BMW E30 won't start? Step-by-step guide to diagnosing an E30 no fuel/no spark issue!

So your BMW E30 won't start? Here's my step-by-step guide diagnosing a no fuel/no spark issue on your E30! There are a number of reasons an E30 may not have fuel or spark, all of which are easily diagnosed by following this step-by-step guide. We cover several areas (12 to be exact), including the most likely culprit, a faulty crank position sensor. But we also cover the relays and fuses that may cause this and how to test them easily as well as the coil and ignition system and many others! If this video doesn't get your car running again feel free to drop a comment and I will respond asap to help remedy your issue. For more E30 content and a bunch of variety when it comes to builds and flipping cars, subscribe to the channel! I upload multiple videos per week.
#e30 #e30wontstart #e30nostart

[@kenobistyle]

Great video mate. Really helpful. Spot on about people needing a visual guide.

[@jayvalentin018]

Great video. Really appreciate the easy to comprehend and straight forward lesson. Made the 15 min worth the watch 🤝

[@adriangourlay]

you my mate are an absolute legend... this video helped me fixed the no start problem on my e30 and get her home without needing a tow. thank you so much for your time and effort in making this video... a visual is better than the haynes manual all day long every day!!!

[@CARSTUDIOYT]

Glad i could help!

[@bimmerlife5452]

Your video is amazing bro thanks I been fighting my e30 2 days none stop it’s driving me crazy and I’m still in love with it

[@quinnritter5800]

Dude thank you so much! Turns out my connector on my fuel pump was loose but this helped me save money before I started getting relays and new pumps! First Bmw I’ve owned and definitely learning lol

[@CARSTUDIOYT]

Glad my video helped!

[@hippieJOSH420]

I just bought a crank no start and this is going to be a very helpful video. Thank you!

[@adamtaylor4627]

DUDE! This was an EPIC way to track down my "out of nowhere" no start issue after installing my suspension and brakes! It ended up being spark for me because I'd forgotten that the hood slammed down on the car while it was in the air and there was a board resting on top of my coil wire. When the hood slammed down, it broke the cable off of the coil cable going to my distributor and I didn't even realize it until I went to press down on the coil wire and realized it was broken off inside of the boot and I could feel it. I repaired the wire and it started right up! Thanks for the tutorial!

[@CARSTUDIOYT]

No problem man glad I was able to help!

[@wadeunder3681]

love the video going to pick up a no start e30 that’s not getting fuel definitely will be watching this video again!!

[@angelbalaguel6743]

Great video and very informational!!!

[@Codyboii]

Thank you for this video man! I just picked up an 87 325i with a no start issue and after watching your video and doing what you said it ended up being the fuel pump relay! So thank you again sir!

[@CARSTUDIOYT]

glad i could help!

[@Texasalf]

All the replies you do they’re great. YOU are really GOOD PERSON GOD BLESS YOU...!!!!!!!!!

[@stevebaron424]

Good, helpful video. Had the no-start situation, turned out to be the main relay. Thanks for your help.

[@lesleyavery7166]

Great informative visual video that is very helpful and well presented Thank you for sharing. Currently I am looking at an older E30 with a 7 Pin Fuel pump Relay !!

[@CARSTUDIOYT]

Let me know if you have any questions! Its our duty to keep these dinosaurs on the road

[@gottobemcneedy9402]

Awesome trouble shooting session. Thanks a bunch

[@corbana4743]

Great info , thanks for sharing

[@babyjuju4411145]

Excellent video.

[@georgesbouchakra]

You just may have saved my life thank you so much ❤

[@tinaishemunyukwi8343]

thanks mate, this is a good video Helped alot

[@CARSTUDIOYT]

Glad to hear it!

[@ant7741]

oh my god this video is straight forward and exactly what i needed! THANK YOU!!

[@Texasalf]

You good on how to Splaine to look for a problem and find it appreciated this video and look forward to see if I can get help to start my E30 1988 thank you, been parking for a year and a half no clicking that all. Any help I appreciate it. 🙏🙏🙏. This video a help me 90% to be close to start my E30. Thank you again...-:))

[@real-timeupdatestv4767]

Great video

[@twesttv]

Great video thanks

[@donfromcornerbrook]

thank you so much! really helpful

[@Supercarlsunday]

Good video, thank you 👊👍

[@jancarlosmorillo5207]

You the men thank you for your help A1 🙏❤️

[@CARSTUDIOYT]

Happy to help!

[@danielc6816]

Thank You!!! Luckily mine started after jumping the fuel pump and main relay. Wish I would've known this when mine stalled while driving, it could've saved me $150 I paid for a tow truck... sigh, but now keeping the wire in my glove box in case it happens again.

[@ceeker4210]

My e30 m20 ran prior to replacing the head. Engine and ign timing confirmed. Installed a 284 cam. I have no start. I swapped the tps plugs to rule out mix up. I guess time to use your diagnostics..thanks for this vid..will report back with findings.

[@CARSTUDIOYT]

Good luck, id check spark first and then compression for sure since you did a head job.

[@franciscorobles3973]

Chingon video 👌👌👏👏👏

[@net55588]

thanks 👍 very helpful

[@CARSTUDIOYT]

You're welcome!

[@nickdavis7732]

GOOD MAN

[@luislemus6873]

Thanks bro

[@vinnystvincent9788]

Great video! Question is the cps senser on # 6 spark plug wire ring around

[@CARSTUDIOYT]

Nope cps is on the front of the engine right above the crank pulley. It does plug into the same spot right beside the plug youre talking about

[@Walterzondi-zg5ku]

Thanks a lot

[@krutonsurfing]

Hey dude nice video. I’m having a starting problem with my 1987 325i. I’ve had the car for 20 years and just replaced the head from a failed timing belt. I got it all going and was driving about 2 miles and the engine shut off. I wired the fuel pump relay and it works. Got a new fuel pump relay and it worked for a full day (50 miles) then erratic high idle (2000 rpm) and it shut off again. Wired the fuel pump relay again and it has been running for a few days like that. When I wire the fuel pump relay the fuel pump doesn’t come on like yours did in the video when you wired the fuel pump relay. It does work though cause it fires right up with it wired. I also have a three blink check engine light come on that means the coolant temperature sensor is faulty. New one is on the way. Ohm meter wasn’t consistent on the cts on the thermostat housing. Been a three month journey getting this Beamer back together and she runs good just a few things to be addressed. I hope I don’t have the camshaft and crankshaft position sensors backwards like you talked about. The metal clip facing upwards and positioned on the drivers side of the two connections is the crankshaft sensor yah? It’s raining so I’ll check them first thing. Any help would be awesome.

[@CARSTUDIOYT]

Yes that is the crank position sensor and induction sensor, if they are swapped it wouldnt run at all so thats not your issue. I would inspect the wiring to the fuel pump and all grounds. Its also possible that the fuel pump itself is going out and that would explain it working intermittently and could also cause the erratic idle.

[@goldmember504]

Thank you so much! Just got an e30 this helped!

[@CARSTUDIOYT]

Glad it helped!

[@goldmember504]

Yes and no. Waiting on my oem crank position sensor. Found a new meyle brand with .940 ohms. May I fb messenger you?

[@CARSTUDIOYT]

@@goldmember504 sure

[@goldmember504]

@@CARSTUDIOYT can you search me Lee Dang New Orleans, la. There are a million car studios. I’ve replaced my cps just now it started. Then when I pressed the clutch it died… wouldn’t start… then it started… pressed in clutch… didn’t die… turn in a/c, pressed in clutch it died. Now it won’t start. Changed fuel pump relays, dme relay, cps. Help!

[@goldmember504]

@@CARSTUDIOYT I figured it out. Bet you never heard this one. I just revamped my entire ac system… how does this relate to an ecu problem? The low side line in the glove wasn’t insulated. Opened up the ecu and had water damage. I have wrapped the line and ordered a new 173 ecu upgrading from 153 so I can have a stomp test and idle loop!

[@gmzysq]

I change both fuel pumps, fuel filter. Check fuses and relay. Relays have power but fuse 11 have no power at all time. Need advice were too check and fixing problems. Thank you.

[@TaigaFukuyama]

What part # is the CPS sensor? Got an 85' 325e cranks, no spark with all relays good and spark plugs/coil/distributor new so I'm thinking CPS. I can't find the genuine BMW sensor online and was wondering the part #. Online seems confusing with crankshaft and camshaft.

[@CARSTUDIOYT]

ETA cars are a little different. most if not all of them have the cps on back of the engine and use the flywheel for reference rather than the crank pulley like I cars. I dont have a part number for one but fcpeuro or pelican parts are good sources for oem parts.

[@chgotbanned]

Going through this shit right now, New cps, new fp relay, gonna try to jump the main relay tomorrow and see if she fires

[@CARSTUDIOYT]

Good luck! let me know if I can help.

[@mimik0201]

Do you know if the e30 318i has a cps sensor? It has the 4 cylinder m10 engine. Can locate the cps on this engine and i cant find anything on it online.

[@PeterTata-yo7ji]

Please tell me how you rerouted the CPS wire over the top! thank you !!!

[@Knowheaux]

What’s the part number for the inline fuse? Is it 50 amp?

[@richardwebb9400]

What is the small connector box between the shock tower and the fuse box

[@thisisyaren]

man whats your part number on that fuel pump relay and how do I get one? also the mains relay how do I also source one??? I have a 1987 e30 euro spec... I sorta seem to find the fuel pump relay but that Mains one how man?

[@grahamparker9470]

Please do a e24 no start video

[@ilkkak3065]

And get rid of the after market car alarm of 90's before you spend a lot of money to changing parts. Worked for mine E30...

[@rodolfoandrade4343]

I got a after market alarm and I need help taking the alarm off did you just trace and start unplugging

[@rodrigolezama1378]

My engine crank but there is no spark at the spark plugs … but the bobine does work …. Is there any possible issue with the rotor or smthing ?

[@ludwig_der_grobe]

Very good video and helpful. I did all the tasks shown here, but mi E30 is still having hard to start only and only in a particular weather condition; when is humid in the morning. After it starts, anything can´t prevent it to start normal again. In a dry weather it starts relatively normal, even in the morning. But it went to worst by the years, because I remember that a few years before, it started very fast. I even changed the battery to test the fuel pump; with 12.7 Volts, and anyway, is still starting very hard and after cranking a long time, before killing the starter motor or the battery, weakly the combustion appears from low revolutions increasing to normal. Still I can hear that not all cylinders are working. After around 2 minutes since it started, the engine begins to run normal, without the sensation that one spark plug is gone or a cylinder is not combusting. Very weird.

[@CARSTUDIOYT]

The fact that the weather has an affect on how it starts has me thinking you need to check 3 things: Your distributor cap and rotor button, moisture can settle inside if the seal is deteriorated which would cause a rough cold start til it evaporated. I would also check your coolant temp sensor, an easy test for it is to just unplug it on a cold start and see if it starts easier, or after it has started and is idling rough you can unplug it and see if the idle smooths out. It is the blue sensor on the thermostat housing, very easy to get to.

[@jorgela3322]

Same happens to me! But my car actually stops after a while!

[@user-vb7tj5pz1q]

Trying to find a diagnostic plug cap for my 1987 BMW 325 automatic coupe

[@Romechode]

Im having an issue with my 84 318i, none of the injectors are firing. Would you happen to know what could be causing it?

[@01AudioVideo01]

Followed all your steps to check why my 1990 E30 would not start. Seen that I didn't have any fuel flowing so I used the jumper wire to get the pump to run and it worked but the power wires to the pump were loose so it only worked part time. I had to wiggle them to get a connection. Checked the CPS, checked the DME relay and everything was good but still no fuel. Even with the wires contacting the pump. The last owner said "the filter was clogged" so I pulled it. Still no flow. Come to find out the wires to the pump were crossed! It would get power but the flow was backwards.

[@CARSTUDIOYT]

Thats awesome! Glad thats all it was

[@chancejohnson3460]

Hey bud, I recently pulled the motor on my 1986 325. When I put the motor back in it wants to crank with no fire. The relays are getting power along with the fuel pump but the injectors are not. Just wondering if you have any guesses except CPS

[@deshaunsc920]

Hey did you ever figure this out same issue

[@bimmerlife5452]

I got it fired up it’s running now cps wire was disconnected for some reason don’t know why

[@aidsla7591]

Gotta send this to my mechanic he says he workes on bmw but has had my car for 10 months

[@gurcanali]

The main relay you say jump them 38 and 87 i check but i dont see 38 only 30 and 2 x 87

[@garrettcampbell4790]

My fuel pump is wired to a flip switch and not the the fuse doesn’t work but the fuel pump dose but I still reserve so spark could that be a problem

[@Dprill95]

Blew my fusible link and fixed the short. Is there any reason i shouldnt replace with just a normal fuse?

[@CARSTUDIOYT]

nope, as long as its the same amperage you will be fine.

[@thisisyaren]

how many prongs is your DME relay???? what exactly is it??? on my 1987 E30 235e I don't see this type of setup... I see a 4 pin 30a on the DME I see a 5pin 30a on the fuel pump and then a 4 pin 30a on the oxygen .... do you understand what im getting at man????

[@rebeccasteiger1140]

Thank you good info.

[@antoniomontana4582]

I have a problem with my 325e 86 it only starts accelerating at half or full throttle if I stop accelerating it turns off install a new fuel pump from the tank and the fuel pump from the outside new fuel filter clean inyectors. check everything in your video but I can't get it to stay on without accelerating could you help me

[@antoniomontana4582]

The crankshaft and camshaft sensors check connections if I disconnect them they do not turn on when I connect them they turn on again

[@michaelroberts5644]

What about the box under the driver steering

[@nateavila7619]

Is it 30 and 87 on the dme relay

[@ghettodwella]

When I try jumping my fuel pump relay - fuel pump not engaging, it remains silent. When jumping fuel pump directly from a battery - it works. Any idea where to look at to fix this? Could it be ECU related problem?

[@CARSTUDIOYT]

If youre jumping the relay that would bypass the dme. Are you getting constant power to your relay? I would check the fuse first then wiring to your relay and also wiring from relay to the pump.

[@ahmedibrahem2305]

Awesome video...could u help me with my m42b18 engine it has no spark or fuel pump not working issue

[@CARSTUDIOYT]

Id start with checking relays then i would check the crank position sensor, make sure you replace with oem only. A bad cps will cause no spark or fuel on an M42 as well

[@ahmedibrahem2305]

@@CARSTUDIOYT i did replace crank sensor ..and did the test for relay as ur video connect no 87 and 30 with wire and i heard the fuel working ...does it mean that relay is not working ?

[@CARSTUDIOYT]

@@ahmedibrahem2305 not necessarily, something else could be telling the relay not to kick on. Did you try to start it with the main relay bridged like that? If it doesnt have spark or fuel then it would be you main relay thats the issue or cps or dme. If the relay is good then something else is not telling it to kick on.

[@ahmedibrahem2305]

@@CARSTUDIOYT okay i will try another dme ..how i bridge main relay?

[@stickshifthappens4636]

Great vid! My 325 eta cranks, has fuel, but no spark. Measured 12V at the coil w/ ignition on. Coil resistance is within spec. What could be the issue? CPS? Main relay?

[@CARSTUDIOYT]

I would start by jumping the main relay like I do in the video and with it jumped, try to start the car. If it starts then its the main relay and if it doesnt I would suspect the CPS. On an ETA however, some if not all are a little different than M20B25 cars. If your cps isnt on the front like mine then its on the back of the block and uses the flywheel as reference.

[@stickshifthappens4636]

Thank you!!

[@mannysierra2047]

Mine having the same issue I did all wat you guys did everything is good I got fuel and everything no spark and there’s no cps on the passenger side there’s one on the driver but not bolted on just clips on to a bracket

[@rainbowfarts117]

I had the same issue. Even replaced me CPS which is on the bell housing. Didn’t work. So I replaced the DME, and it started just fine

[@mannysierra2047]

I replaced my dme but the car still doesn’t wanna start found out my dme was burnt i spray started fluid in throttle body when I have it wide open throttle I crank like it wants to start. But it doesn’t and I’m gettin fuel because I disconnect my fuel pressure regulator and fuel shoots out

[@seramemotaung9199]

My e30 panel lights refuse to come on and does come on without warning and the car starts, where can i start checking?

[@cano_8315]

Hello I had a question !

[@rainbowfarts117]

My 325e did the same thing. I had to replace the DME. I replaced the fuel pumps, relays, coil, wires, cap and rotor. Turned out the be the DME.

[@rainbowfarts117]

The one under the dash in the glove compartment for those who don’t know

[@justinvigueras8938]

Digital Gamer, I have an 86 325es I believe I need to replace my DME also. Could you point me in the right direction as to where I should purchase it from? Also the part number I was given is 12-14-0-008-963 but I also came across a part number 0261-200-027 does any of those sound familiar to you?

[@ethanblum5344]

Hello, I am having a very similar issue right now, my 1987 325e that I just replaced the external fuel pump and filter, and reference and speed sensors, it will start up and idle for a few minutes until it starts bogging down and stalling. It will then start up for a second and then stall again. I still need to test the in-tank fuel pump and fuel pressure, but just wanted to see if you had any input!!

[@LepKraj]

Did you have no crank no start? That's the issue I'm having... lol

[@914sam5]

I need help !!! I have a 86 ES E30 with jumper cables on, the horn, Radeo, lights gauges all work. I know I have fuel 1 line above the valve cover has a hair line crack in the hose lol and it drips fuel while attempting to start it. But all I keep getting out of the car is a slow motion cranks. Car history I’m the 3rd owner purchased the car from a 80yr old man it’s completely stock. I’ve owned it for months I just want to hear it turn on !!!!!!! Please help.

[@CARSTUDIOYT]

Check for spark first and then if it has spark see if a little starting fluid will get it to fire then you know its just lacking fuel. But be sure to inspect timing belt before starting if it has sat for years.

[@Jack-qs1es]

Hi I bought a 1992 318i Convertible it's been sitting since 2010 PO that I bought from said he had it running, it did not start when I bought it Fuse 11 does not pop Swapped all relays from a running e30 (even tested my old relays in my running e30, '90 325is it starts up no problem with both sets) Swapped in a new fuel pump 2x (I never hear it prime) --> I don't hear the fuel pump when I jump the relays either --> There was pressure in the fuel pump line when I swapped fuel pumps the second time Swapped DME from a running 318is no start from me New Crankshaft Position Sensor, same issue Also swapped back to old CPS in case new aftermarket one was not running well PO put too much oil in the car but I drained it and did a compression test Compression Test, all 4 cylinders ~218-226psi It doesn't leak oil either I didn't think it was the fusible link since it cranks and has spark. Any leads would be helpful thank you!

[@CARSTUDIOYT]

If youre not hearing the fuel pump prime its is more than likely a cps issue. I had an e36 one time with the m42 (same as yours) and had the same issue. You CANNOT use an aftermarket cps, 9/10 they do not work. Put the original back in and just run straight power to the fuel pump and see if it starts. It could just be a wiring issue.

[@Jack-qs1es]

@@CARSTUDIOYT Yeah I have the original back in I'll try to get the pump some power this car has been a headache haha

[@irishfarrell7966]

Hi, I have crank no start issue. I put a jumper wire in the fuel relay slot like in this video and my car starts up. So I went and replaced my fuel relay with a brand new one but the car still won't start. What should I check now. Would really appreciate any help from anyone. Thanks

[@carterlukow7085]

I recently bought a e30 325e, and it starts and runs but has a rough idle. There was bad fuel in it but I cleaned it a little. Today it would start but then when I hit the gas it stopped working. Any advice?

[@bmwethirty5901]

Make sure you positive terminal is fully connected, clean out the icv(idle control valve)

[@CARSTUDIOYT]

check for vacuum leaks, also as mentioned maybe clean out your icv and it doesnt hurt to spray a little wd40 into it.

[@jhayrpusay9557]

what cause of no spark on sparkplug bmw 735i??

[@joseclara1068]

Last week my car just randomly turned off and didn’t want to turn over, I came back to it a couple days later it turned on but after a couple of minutes It just shut off, so I think it might be fuel pump

[@CARSTUDIOYT]

It could def be the fuel pump starting to lock up

[@donmarthahancock9397]

Great information Is there a phone number to speak with you in person regarding my project. Engine hasn't been running in 15 years.

[@CARSTUDIOYT]

[e-mail] thank you! send me an email with any questions and your contact info in case if it cant be resolved through email.

[@joheinemichaels3781]

What if you get fuel and no spark I have checked for spark but haven't got any coil is dead tried a spare it still doesn't give spark

[@supermansteve32]

@ 7:08 what is connected to the second 3 prong wire harness? Mine is just dangling there bc the previous owner removed what it was connected to. Can't find this info anywhere. Thanks

[@CARSTUDIOYT]

If you are talking about the identical plug beside the cps, that is the inductive pickup. It looks like a spark plug wire and goes to the number 1 plug wire, its supposed to aid in firing the injectors but several have said it doesnt affect the way the engine runs at all except possibly less mpg. If you look at a used set of plug wires on ebay you will see what it looks like, it just has a little plastic ring that wraps around the plug wire.

[@supermansteve32]

@@CARSTUDIOYT thank you. I was able to figure this out on a random BMW forum a guy had this same plug in that had fallen off. Many thanks for the reply

[@supermansteve32]

After researching this non stop for 3 days

[@austinpruett8987]

I replaced both relays coil, cap, rotor I tried the jump wire the fuel pump kicks on but when I turn the key over the fuel pump shuts off while using the jump wire

[@CARSTUDIOYT]

You may have a cps issue, I would run 2 jumper wires straight from the battery to the fuel pump and then try to start it and if it starts you may have a wiring issue. If it still doesnt, I would replace the cps with an oem one.

[@austinpruett8987]

@@CARSTUDIOYT thanks man I will definitely try that

[@austinpruett8987]

It’s a wiring issue! Thank you for the tip man I really appreciate it !! Keep up the good work

[@hamzahqadri5279]

Can anyone tell me where the CPS is on my 1985 325E! I can’t find it !

[@hamzahqadri5279]

What if my ignition coil has no power? And I replaced the dme relay with a new one

[@CARSTUDIOYT]

Check to see if your fuel pump also has no power. Of thats the case then its your crank sensor

[@hamzahqadri5279]

I checked the terminals on the ignition coil it has 12Volts. I don’t hear the fuel pump prime- how do I check if it has power?

[@terrencewilson4618]

When I use the wire from pos side of coil to pos side of battery the air flow meter hums and the car starts. I put my hand on it to feel it, and it was humming away, and the car starts right up. When I pull that wire off, the car will not start. The CPS is new, wires and plugs are new., I changed out the chassis ground, new ignition switch, and borrowed a good CPU from friend. Still no start. Do you know why the jump wire is igniting the airflow sensor and starting the car?

[@CARSTUDIOYT]

Are you saying the car starts on its own when you connect that jumper wire? it sounds to me like you have a relay sticking. Also make sure its not your idle air control valve thats humming. I had the main relay sticking on my car years go and with the key off the idle air control valve was humming.

[@terrencewilson4618]

Please help.

[@terrencewilson4618]

It starts when I turn the key and have the jumper wire connected. But the air flow sensor immediately comes on when I connector the wire, then turn key and it fires right up. Also thank you for the fast response.

[@CARSTUDIOYT]

No problem, you need to check your main relay and all fuses

[@curtissmith2764]

I have an 85 bmw325e there's no spark the crank sensor is at the rear of the engine. I have replaced both sensors there, replaced coil,distributor cap and rotor button. Replaced both fuel pumps. And now it still has no spark.

[@CARSTUDIOYT]

Did you use an oem crank sensor? Have you checked the main relay as mentioned in the video? Do you have access to another car with a known good crank sensor you can try?

[@curtissmith2764]

@@CARSTUDIOYT I replaced both the fuel pump relay and the mce relay. I forgot to mention that. I haven't checked the timing or changed plugs or wires.

[@real-timeupdatestv4767]

I need your help bro....... We are facing the same problem with E34 m20b23.........

[@CARSTUDIOYT]

sorry for the delayed response, if you followed everything in this video and are getting fuel and spark then you should check your compression. If you followed all of these steps and still not getting fuel or spark then I would check the ignition switch, wiring, and ecu.

[@real-timeupdatestv4767]

@@CARSTUDIOYT okay.. Please can u give me any contact that I can use to reach you.......

[@RALLIARTslyboy]

My e30 I’ve had for years never once started I want to be pointed on the right direction 325es!

[@CARSTUDIOYT]

Inspect the timing belt for cracks/dry rotting first and foremost

[@JoseOrtiz-hb9gx]

So are there two CPS connectors or one? There are two connections and I only ordered one…🤦‍♂️

[@CARSTUDIOYT]

The cps is only one connector but it is identical to the tach sense connector beside it. If you accidentally swap them the car just wont start, it wont hurt anything.

[@bimmerlife5452]

It still has awful idle when I press the gas turns off I’m thinking it’s maf on 100

[@CARSTUDIOYT]

Thats great you got it running, have you figured out why its dying? I would start at fuel pressure. Could be a bad high pressure pump.

[@santosreyna1523]

I have a 1985 Bmw 535! With a no spark issue anybody know what could be wrong?

[@djc6394]

What happened when you crossed the connectors for the CPS and the adjacent connector? Do you know what the other connector controls? I have been chasing down a no start on my 88. Fuel pump works and in fact if we try to start long enough we get fuel backing up into the intake and back to the air box.

[@CARSTUDIOYT]

Nothing, it just wont start. Do you have spark?

[@djc6394]

@@CARSTUDIOYT thought I did. Had to sideline this project to work on others. Today I put the battery on a trickle charger. Tomorrow I will check spark. At one point it acted like it was going to start for about a second. Then nothing. Cranks fine and we definitely have fuel.

[@CARSTUDIOYT]

@@djc6394 check your timing marks on your timing belt also. You can inspect cap and rotor button at the same time.

[@djc6394]

@@CARSTUDIOYT you mean check timing? As part of our refurb effort we did replace the belt and tensioner. This car has been off the road for at least 8 yrs and the owner died so I can’t get info about why it was parked.

[@djc6394]

Tested this morning. Pulled plug on six and got good spark. (Plugs are new). Checked CPS wire and as long as you use the mounting plate it looks like the two wires cannot be crossed as the plugs are oriented 180 degrees. Found plug under intake disconnected and reconnected it. Tried to crank and after a couple revolutions it started to catch like it was going to run but then died. Tried again and the engine spins but nothing happens. Now I smell gas. Makes me think there is something going on with the spark.

[@jacobdonner1242]

I’ve check and or change everything you said to look at and it still won’t start

[@CARSTUDIOYT]

Need to pull the fuel line off the fuel rail and put it into a water bottle and crank the engine over. If you’re getting fuel check your spark next. If you have both of those then check your compression. Its possible the timing belt jumped a tooth or more or snapped.

[@BenPengen]

Hai my name is Ben, i hv BMW E30 MY PROBLEM IS MY CAR CRANK OVER BUT WONT FIRE UP, i hv fuel, i hv spark, i check fuel pressure up to 30 PSI , IM NOT SURE IS THAT ENOUGH FUEL PRESSURE TO EPEN UP FUEL INJECTORS? The only think the car can fire up if i pinched the fuel return line. Can you give me a hints what seem to be the problem?

[@CARSTUDIOYT]

It should have 40-50 psi at the fuel rail but i have ran these cars with a small 8 psi pump before just to test the engine. Check you C101 connector under the intake if its a late model. Id also see if it will run with starting fluid so you can narrow it down to a fuel/injector issue.

[@BenPengen]

well the car is run when i pinched the return line , is that possible my fuel pump dont put enough pressure? because the car only have 29 PSI , ACCORDING TO YOU 40 UP TO 50 PSI@@CARSTUDIOYT

[@BenPengen]

ii spray with starting fluid the car start, do you think the injectors problem? and again if the injector problem why the car start if i pinced the return line? thank you for your time to teply my message i relally appreciated..@@CARSTUDIOYT

[@BenPengen]

what is C101 CONNECTOR? IS THAT SOMETHING TO DO WITH FUEL SYSTEM? @@CARSTUDIOYT

[@rimsathnm]

✌

[@shivasewnath6086]

Hi bro i need some help

[@WithHeroes]

Mine was missing and fuel canister had a hole in it haha

[@gmzysq]

Any one, I need HELP! 1985 BMW 325e automatic, 4 door. Change both fuel pumps, filter, crankshaft position sensors. No power on fuel pump fuse #11.

[@gmzysq]

I found problem by checking power wire from battery. Small black wire on positive post that going under hood on the side of main cable was corroded and not given power to main and fuel relays. I simply connect small wire to mean cable under the hood, and I have power for both relay.

[@mikebeard3630]

I got '2' e28 and '3' e30,,

[@mannysierra2047]

Mines doesn’t start has no spark out of the coil it’s getting power but no spark coming out got the far of a friends family

[@CARSTUDIOYT]

If you have power to the coil but no spark then i would definitely assume the coil is bad. You can buy a new one from an auto parts store for a very reasonable price.

[@mannysierra2047]

@@CARSTUDIOYT I bought already a new coil and still no spark coming out of it

[@lobanov2454]

Ooo man i got true all this problems.. Miss fire 1.3.5.. Test by test..change head gasket..still missfire... ......and bingo ..OC2 SENSOR..56 BUCKS.. I fill like shit after all.....

[@cyberiolooney3430]

My E30 suddenly lost power under fuse 11 😳

[@richardwebb9400]

Where is the crank position sensor on a 82 633csi

[@CARSTUDIOYT]

theres 2, one for position and one for speed. Both are located in the bellhousing.

[@richardwebb9400]

@@CARSTUDIOYT thank you so much

[@real-timeupdatestv4767]

Everything is working but the engine won't start

[@CARSTUDIOYT]

If you have fuel and spark then I would do a compression test next, may have snapped a timing belt or jumped time.

[@Tshaneee]

It’s blown upppppp

[@CARSTUDIOYT]

hahaha