How to check if your B58 Injectors are stuck open *Super Easy*

[@kern417]

How to replace your injectors: kzbin.info/www/bejne/oKfVlmpop7t6ha8

[@Domas64]

Awesome, very good idea. We need to learn how to watch and read the logs. And diagnose issues.

[@larsloopmans7280]

Bought a 2018 140ix drive last week(coming from a 500whp n54 that i sold 3 weeks ago) and i’m so glad there are people like you bringing al this info to the platform, love watching your videos man!

[@kern417]

Appreciate the support

[@Jmay6907]

I feel so much better knowing I have an easy way to check this! Thank you!

[@kern417]

glad to help

[@raymondchen5202]

Extremely helpful, this is a great way to reliably check and confirm the injector is closed properly

[@EditCrazeEdit]

It can’t be safe to drive your car when you suspect you have a stuck open injector? You’re just doing damage at this point to the engine

[@m5nut]

That's such a good thing to know, thanks Kern. Always bringing the insights!

[@gibby3820]

appreciate the work you put in for our crowd!

[@TeeZB58]

And thank you as I have gotten so knowledgeable and every time I’m having an issue with the car seems like you post about it covering the topic ! Thanks again!!!

[@maximusisaac3553]

love the new intro!

[@georges117]

Yes ❤

[@alpinweiss3403]

Always dropping knowledge. Thanks man

[@hondake94]

Maybe a good tip. If you find out it's not the injectors leaking check oil level if its to high it is probably the hpfp. Good tip btw from kern and if you are a car mechanic and you have a petrol exhaust gas tester and it can measure HC do it like this instead of smelling because you will have a visual confirmation because it will skyrocket with the leaking injector

[@johnnygarcia8252]

Just the video I needed!!! Thank you

[@devriesetom]

Hi kern, Have been doing this check regularly. Noticed the speed at which it raises is alot slower then it used to. Also used to go past 1700 whereas now it only goes up to 1600 slowly. Should i be concerned?

[@Кирилл-ф5й2б]

Thanks for usefull information!

[@pavelovcear1274]

Awesome life hack

[@MrRickstarrr]

Hi great vids im having issue with my 330e 2017 misfiring changed plugs and coils still doing it drive train warning present so thinking to change fuel injectors, do you think it could be them that’s causing issue? Thanks

[@john.connor1]

Awesome man! I recently found out about the injector fail problem and how catastrophic it could be. I'm installing a racechip GTS Black into my 2017 M240i tomorrow, the car only has 50k kilometres or 31k miles, should I be concerned at all?

[@john.connor1]

And would fuel injector cleaner be a good idea every few thousand miles?

[@vividmotion66]

Thanks for sharing

[@BorNtOrIdeE1]

Hello Kern, Thank you for uploading these valuable videos. My 2016 340I was having a hard time starting up and after it did start up and get warmed up to operating temperature, after I shut off the car, I would have to wait until the engine is completely cooled before I attempt to start the car again, otherwise, it would not start, just crank and fail to start. I notice that it starts better when I have the battery hooked up with jumper cables to another car. I also got a little better after I changed my spark plugs recently. The car starts up faster now but still lags a little bit before starting up not nearly as bad as before changing the spark plugs though. It is at 97K miles. I am confused if battery replacement will fix this, or starter motor or do I need to change my coil packs as well as injectors? I have not scanned the car for codes since I don't have the scanner. Any advise would be greatly helpful.

[@kern417]

scanning for codes is always the first step

[@b_checkmeout9974]

I found filtered rail pressure actual value which mine toggled between 13 14 mpa. When i turned it off it was toggling 16 17 mpa

[@TheShamanMechanic]

I have a 2016 Mini Cooper S that I'm trying to figure out the misfire on. I did this and the reading when first warming up was around 1700. After running for a few minutes, it jump to 2700. That seems scary high. What could cause that?

[@raphaelperez2478]

This is unrelated to the video but I had a question. Could I install my P.R. PI system with a stock turbo? I do plan on going with a Pure 800 soon but thats when I save up. I have the port injection already and wanted to know if I was able to install it with the stock turbo, would it be beneficial or should I just wait to install everything all at once. I have a TU pump already. Thank you. love the videos!

[@kern417]

You can do it. The main benefit is running higher ethanol content without losing power, and more boost / torque down low than the system can support with just an hpfp upgrade.

[@bundazliga9618]

Kern, firstly thank you for the useful content as always. I wanted to ask if a bad fuel injector could be causing throttle lag/power surging. I have an issue with my B58 M240i and other in forums seem to be experiencing it and they either title it as throttle lag or pier surge when accelerating from standstill. Are you able to release a video on this issue?

[@kern417]

It's possible but it could be other things too

[@136videos]

What year is your vehicle? 2016 or 2017?

[@AlexDamian21]

Hi Kern! I love your stuff. So I've just installed a TU pump and I'm having some issues. Just did the test you do in the video and after I shut off my car , the rail 1 pressure drops immediately from 1450 psi at idle to 650 and going down from there in like 15 s . I can't really see any fuel dripping from the fuel lines . Do you think the pump is mounted badly? The car did not misfire once , the horsepower is there also .

[@AlexDamian21]

The first red flag was this code 11B501 : pressure too low after engine start . I have a b58 first gen

[@AlexDamian21]

@kern417

[@khalidalahmed2109]

I have a 2016 B48 engine that cuts while driving, slight vibration in the engine, and an exhaust smell while accelerating without any codes.

[@JohnDoe-nm9et]

Fuel vent valve maybe? Idk

[@TeeZB58]

Okay so I’ve been having this low pressure issue at cold start. Pretty much only issue I have in the car, I’d there anyway to get more pressure in the lines to avoid to over cranking ??

[@kern417]

Sounds like a lpfp issue

[@HH-g80]

same low pressure issue. they replaced my lpfp a year ago but did not fix it. It happens when ambient temp gets warm recently. Dealer basic could not do anything since no cel. The hard crank happens every morning. It now starts like a tractor.

[@kern417]

No tune or anything?

[@f30diff]

W info appreciate it

[@terryevans1956]

As always. 👌🏻

[@elrockamaster]

Injectors stuck open = excessive white smoke smell like fuel and possible fuel in the muffler

[@ObamaBinLaden.]

How long does it take for a leaky injector to cause catastrophic damage? Will a leaky injector cause immediate engine failure or would you be able to catch the issue in time?

[@kern417]

you should be able to catch it

[@b_checkmeout9974]

Can you use the any of the bimmer software tondo this

[@ambientsounds1416]

But I don't have any spark plugs on my diesel common rail.

[@xcashinx7370]

Seen you got a rk v2 manifold 👀

[@kern417]

🫣

[@stev204en]

Kern, any idea what parameter in ECUtek to watch for the fuel rail pressure drop? Can't seem to find it

[@kern417]

Maybe rail pressure. Some also label it "hpfp."

[@catman41155]

I was wondering if you know which sensor I would use on Bootmod3 for fuel rail pressure? Would it be HPFP Actual psig? I'm not seeing anything specific called Rail Pressure

[@kern417]

Yep hpfp actual

[@catman41155]

@@kern417 Thank you!

[@mrjpz]

Overall my rail pressure is building but i lose like 2psi every so often while its going up. Is that a cause for concern?

[@kern417]

no, there's some variation since it's just a sensor reading the data. an upward trend is good.

[@mrjpz]

@@kern417 okay that makes sense thank you

[@Cmatt1299]

May have been answered before but basically the injector would be stuck open because of buildup on the injector itself not allowing it to close properly?

[@kern417]

It could be a lot of things. Electrical or mechanical failures

[@wavy9234]

Using clean gas like mobil or sunoco can prevent this from happening?

[@kern417]

Typically a station with a lot of business has good quality fuel but it really just depends

[@BAZZERBAZ]

The issue with injectors going, washing out the walls and blowing engines....Will this method identify that? Or is that just a momentary issue and instant failure?

[@kern417]

yes it can help catch it before it causes damage. just do a check every once in a while.

[@BAZZERBAZ]

@kern417 brillant. Once again thanks for the info 👍

[@rahimammar9265]

Is there a way similar to this to check ur fuel pump? I randomly get the starter system fault error but after pressing the start button again the car starts up so I’m not sure

[@kern417]

Lpfp? The car has a lot of monitors for fuel delivery and will usually throw a code if your low pressure pump is bad

[@wingedhussar5528]

I take it on BM3 this is listed under HPFP?

[@kern417]

Yes HPFP Actual

[@wingedhussar5528]

@@kern417 thanks

[@pppeter8749]

It raises pressure only when the engine is super hot. After normal driving it loose the pressure slowly, even I drive 20-30 mins. I checked all plugs and 2 and 6 smell of gas, but tip looks clean. Does it mean a minor leaking?

[@kern417]

most likely yes

[@Slow2.0]

So should I replace injectors in this instance?

[@pppeter8749]

​@@Slow2.0 I replaced them. Plug gas smell gone, but loosing pressure slowly after turn off engine. Lines are not leaking, maybe issue with hpfp...? I have doubts concerning of this check. Anyway, car runs well.

[@ScottPC]

If you’ve ever had one stuck open you’ll know 1000% from the strong strong smell of fuel in the exhaust

[@rich798]

I feel like every once in a while I have a strong fuel smell but I'm also catless. I remember like 15k miles ago we hung out behind my car while it was running and we all smelled like gas. Now I'm tripping myself out because every once in a while the car does smell like gas but sometimes it doesn't. Could it be a warm vs cold start issue? My HPFP is holding pressure after turning off the car like Kern showed

[@ScottPC]

@@rich798 for my mates you’ll be able to tell so easy. Literally dumping fuel into the exhaust and smoking away. It’s very obvious so I wouldn’t worry

[@dannyimp285]

hey does this apply to the gen 1 b58 with a stock fuel pump? im running a stage 1 tune without any upgrades to my fuel pump. Getting an error code: 11AA08 (High-pressure fuel system: pressure reduction too high) rail pressure is going down on the mhd Monitor as well.

[@kern417]

Yes.

[@lucpwg8953]

Hi Danny, did you know what is was? I have the same problem at the moment…. Not sure what is could be…

[@nickmarsden8129]

Having this exact issue. Same code, rail pressure going down after engine shutdown. Then I popped the hood while engine running to check for leaks around the rails, didn’t see any. I just ordered new Bosch OE injectors from FCP euro, I’m going to replace them this weekend and provide an update if it fixes my issue, in case anyone reading is still having the issue. (I am running dorch stage 1 hpfp and stage 2+ OTS flex fuel with bootmod3)

[@tuchilds981]

@@nickmarsden8129did it solve ur issue?

[@nickmarsden8129]

@@tuchilds981 Yes but it wasn’t the injectors, It was the HPFP itself. I guess the it wasn’t installed properly in the first place. I took the whole thing off then reinstalled it, worked fine after. Sounds like a PIA but I’d try that if I were you. In the end I actually replaced it just a couple weeks ago with a DS25 since I might go DAW flowmax soon, so now I just have the spare DS1 sitting around

[@paulprince906]

Hey Kern, I have an issue that I want your opinion on. I have a 2016 340 manual and I'm having an issue where at idle the revs drop like the car's about to shut off but it like catches itself and returns to regular idle. About a yr or so ago it got so bad as to throw a drive train malfunction. Took it to the dealer to diagnose an they said it was the tank vent valve. Bought the part and replaced it myself rather than paying $5-600 at the dealer. Have you or anyone else been having this issue? What do you think could be causing it to happen again an again? Haven't replaced the valve again but thinking about it.

[@KrisGenchev]

I had the issue, and indeed it was the tank valve. I believe it happens if you fillings up your car with gas, without turning it off.

[@kern417]

Do you have any codes

[@paulprince906]

@@kern417 been a min since I checked for codes, only code I remember getting before was a system to lean code or something like that. That didn't register a check engine light though. Been a while since I last checked for codes, will try check tomorrow.

[@paulprince906]

@@KrisGenchev this is interesting because if I remember correctly the issue really started to feel worse after I tried to switch from BP gas to shell. Previously when I started the car it would be a suble stumble like it wanted to die but after I filled up with shell it got worse an I switched back to BP. Not sure if that had anything to do with it but don't think it helped either.

[@ants00]

Can this be done with bm3 I can’t seem to find the parameter?

[@kern417]

Yes, it's called HPFP (act)

[@ants00]

@@kern417 Thank you Kern! After doing what you said I noticed pressure going down right after turn off and to about 200psi from 1400-1500 after about 4 minutes. I did get a cel for misfire but didn’t come back and had some white smoke for the first time the other day. I’m thinking that’s enough of a sign to do all injectors but not 100% sure. Any input is appreciated thank you

[@kern417]

Yes if pressure is dropping on a warm engine then replace them

[@Gasdaddii]

If the injectors are stock does it give a code? (21A02D)

[@kern417]

usually if it throws a code, it'll be related to misfires

[@Gasdaddii]

Thanks my guys

[@fredericdekeyzer9761]

Injector stuck open

[@kern417]

Injector stuck open