(Nissan Altima) P0300 Multiple Cylinder Misfire

[@ProphetsAmongUs]

I had oil only in one cylinder and put new spark plugs and ran it for a while and no oil has gone in it yet it’s still dry, do you always have to change that gasket if it doesn’t put oil there again?

[@EliTheOBDTech]

It depends on the situation. For example, if your problem is external oil leak inside the spark plug bore, then yes. In that case you have a bad spark plug seal. If your oil leak is internal causing the spark plug tip or threads to be wet with oil, then no. In that case you have either bad piston rings, bad valve stem seals or valve guides.

[@johncasey4310]

@@EliTheOBDTech no oil at the moment.after 3 differant valve covers and numerous oil seal kits.but running wores than ever.just changed o2 sensor and camshaft sensor.no vaccuum leaks yet

[@kathleenowen5524]

Hopefully you can respond quickly for me, I have an 07 nissan altima 2.5 s it started to shake on me while driving after I bought it a week before. I cleaned the throttle body, changed the air intake hose, new spark plugs, new pcv valve, checked the ignition coils, no oil leaks. I finally was able to run codes p0300 and p0303. Still runs rough I'm kinda stumped on this one. Any suggestions?

[@EliTheOBDTech]

Faulty or dirty injectors, faulty intake manifold gasket, mechanical problem. Sometimes a glitching crank sensor can cause misfire codes. Don't overlook a weak coil pack. Under heavy stress inside the cylinder it can fail. Worst case scenario, head gasket issue, without symptoms of overheating yet.

[@kathleenowen5524]

After I posted this I went to recheck that 3rd coil and found probably the smallest imperfection on it. So I switched it with the 4th one and found the code changed to p0304 so I replaced it and running better than before now. Thank you for the help in your video.

[@juniorotero9030]

@@EliTheOBDTech I have a question too I have 03 Nissan Murano changed the spark plugs had the slightest amount of oil on one of them had a miss fire on cylinder 2 changed that now the p0300 code came up do u possibly think it’s that one coil that had a bit of oil other then that the truck runs perfectly I daily it everyday

[@EliTheOBDTech]

@@juniorotero9030 Possibly. You can also swap that coil on cylinder 2 to another cylinder and drive vehicle to see if it triggers a code where you placed that coil. You can also use a spark tester the one you adjust the gap and see if the spark can jump the gap without any glitches.

[@TheRebuilt1]

Nissan ecu and programming is piss poor. It should be codes 301 and 304 instead of 300. Its not random if in this case its two specific pistions missfiring and think that 300 is produced for cam position sensor isnt getting good reading since two pistons are missfiring.I have worked on nissans and hate when I get p0300 and operate as if i have no scan device and do your basic check of wiring and connectors along with spark plugs. Nissan engineers from this erra should be fired.

[@EliTheOBDTech]

I definitely agree with you with programming issue, not being able detect specific cylinder misfires.

[@jrsblogs]

So cam position sensor is failing?

[@XenomorphLV426]

I have p0300 that comes and goes. No oil leaks. Going to replace my coil packs, since they're 15 years old now.

[@EliTheOBDTech]

Perhaps spark plugs as well.

[@ronniefletes92]

I changed the valve cover, ignition coils, and spark plugs, now my car is randomly jerking when I’m stopped, no light pops up but I just know that jerking isn’t good

[@EliTheOBDTech]

@@ronniefletes92 Possibilities can be fuel delivery problem, such as weak fuel pump, dirty mass air flow sensor or vacuum leaks. I would also check for dirty throttle body.

[@christhopherlasher2828]

Multiple misfires can also be caused by knock sensor very curious on where that location is on this car i know it has to be in the back of the motor but all the videos are for different models

[@EliTheOBDTech]

When I get a chance, I'll look it up. Year, make and model?

[@christhopherlasher2828]

@@EliTheOBDTech 2002 nissan altima s 2.5 liter

[@EliTheOBDTech]

@@christhopherlasher2828 The knock sensor seems to be just below the exhaust manifold, bolted to the cylinder head.

[@EliTheOBDTech]

@@christhopherlasher2828 my bad, after further review, it's actually on the rear of the engine. Almost next to the power steering oil pressure switch. Rear right side, almost next to the right drive shaft axle boot. The 2001 model has it beneath the exhaust manifold.

[@mb1636]

Its a valve cover gasket...its simple work replace fix.

[@AdD-nr3cx]

Good video..I have the same exact issue in cylinder 1 and 4..how did you get the oil out and did it clear the p300 code

[@EliTheOBDTech]

@@AdD-nr3cx I used a fluid extractor, such as the Mityvac MVA6851

[@bda7dd30]

Eli TheOBDTech i have a question i have a 05 nissan altama the problem i am having is the car will run ok then the service engine light came on and i am getting the engine code p0303 engine misfire cylinder 3 and the car shakes in park and reverse

[@EliTheOBDTech]

You might a faulty ignition coil pack that's not firing.

[@Ggg-ef6vb]

P0420 nice.

[@robertwalker9211]

Great job sir 😊

[@yessicastro7236]

2.5 2008, had the same code and same issue with oil in the spark plug wells. Changed the gasket and cover but didn’t clear the misfires. After searching for vacuum leaks it ended being cyl 3 fuel injector.

[@EliTheOBDTech]

Some it's multiple issues. I'm glad you fixed your problem.

[@occckid123]

I have multiple cylinders misfire but the car runs smooth. I have 2016 altima with 420k miles. I changed the spark plight the ignition coils and the fuel injectors for 3 and 4 cylinders. Was good for 3 months then the codes came back.

[@sarcastic_2uNY]

Mine don't have any oil on them, how else can you tell what coil is bad? Without any oil. Curious

[@EliTheOBDTech]

Hi Doreen. You can unplug the connector for each coil pack and see which one doesn't make any rpm change, that's the faulty one.

[@sarcastic_2uNY]

Thank you very much! 😉👍

[@walidamran]

Thanks a lot 😊

[@johncasey4310]

What if it keeps happening evan after replacing valve cover and seals

[@EliTheOBDTech]

You will need to verify that your ignition system is working find, such as your Coil on plugs and spark plugs. Perhaps injectors, etc....

[@motovibeminnesota7955]

John Casey, did you resolve your issue? I'm currently experiencing this. The car has no vacuum leaks/oil leaks. Replaced, spark plugs, coils, cam sensor, valve cover gaskets, throttle body, accelerator pedal, MAF Sensor, injectors, fuel rail, o2 sensor.

[@TRCustomAirbrushTumblers]

Thank you Sir

[@EliTheOBDTech]

You're welcome!

[@georgen7489]

I have 2007 Nissan Maxima when I turn on the car the car starts shaking and the rpms on the engine keep going up and down idk what to do ? Can someone please help ? Thanks

[@EliTheOBDTech]

Is the check engine light on?

[@lur3950]

Great video! Mine has rough acceleration coming from an idle stop at a light (also sometimes engine stalls coming to a stop). It smokes iddling, stutters taking off til some point. At regular speed on the highway gives no problems Changed 2 coils, 1 injector, spark plugs, air filter, fuel pump & fuel filter are fine, oxygen sensor. Keeps giving p300 code

[@EliTheOBDTech]

It could be many things. You may have a MAF sensor that can be contaminated causing these performance issues. Sometimes, if you have oil pressure problems it can affect your VVT system, such as your variable valve timing solenoid, VTC Actuator and that can cause p0300. Worse case scenario, a head gasket issue can also p0300. If you have ascan tool look at your fuel trims and see what the pcm is doing. Keep me posted.

[@lur3950]

​@@EliTheOBDTechOk!! Thank you! I'm going to check that. I'll let you know

[@danielsalinas5654]

So question the same nissan 2.5 your working on if you were to be getting code p0304 but you replaced all spark plugs and coils as well what would be your next step

[@EliTheOBDTech]

Perform a relative compression sound test or compression test with a gauge to rule out a mechanical problem to that cylinder. If that's checks out good, fuel delivery to that cylinder, injector problem.

[@everardocamacho5063]

Great video eli, where are located, what city?Thank you

[@EliTheOBDTech]

In Pomona, CA

[@everardocamacho5063]

Thank you eli for your quick response, cheers

[@Official.Nando317]

Eli TheOBDTech hey I need some help

[@ceeceecb8]

Hi, I have a question. I have a 2017 nissan Altima. My car is misfiring and it jerks even at a stop light. I just had a tune up with new coils and spark plugs. Do you have any suggestions?

[@EliTheOBDTech]

It can also be a VVT issue, faulty vvt solenoid or low oil level causing valve timing issues. It could be many things, it's hard to say without being able to see scantool data.

[@EliTheOBDTech]

Forgot to mention, fuel delivery issue or cam/crank sensors

[@BlackWhite-ru8gm]

Did you ever figure out what was wrong with your vehicle? Mines is doing the exact same thing.

[@Elphxdav]

Doesn't help me. Mine are all dry

[@EliTheOBDTech]

What codes do you have?

[@Elphxdav]

@@EliTheOBDTech p0300

[@EliTheOBDTech]

@@Elphxdav start with your basics, check for spark by using a test light connected to ground. Do visual inspection on your sparks plugs. Fuel delivery, perhaps dirty or restricted injectors, dirty fuel filter. A faulty intake gasket can also cause a p0300.

[@EliTheOBDTech]

Forgot to mention, a faulty crank sensor can also cause a p0300.

[@Elphxdav]

@@EliTheOBDTech thanks

[@lashan4636]

I gotta 05 that stalls and die after long drive. Oil on the coil. Could it be same issue and I’m also getting the same code

[@EliTheOBDTech]

Perhaps, but it also depends if coils are coated with oil fully. A p0300 could also be triggered by a faulty crank sensor.

[@jaquelinesapien1818]

I have a 2014 Nissan Altima s, only give out p0300 code no other code. Check engine Comes and goes. Car vibrates and I changed all coils and spark plugs. Recently changed fuel pump couple days ago. Car has now acquired a knocking noise. Any idea what it could be???

[@EliTheOBDTech]

Hi Jaqueline, have you checked your oil level? These newer cars that have VVT systems, oil level is very critical for the Variable Valve Timing to operate properly. Secondly, maybe one of your Variable Timing solenoids might me acting up/dirty filter screen. Check your oil level and let me know.

[@jaquelinesapien1818]

@@EliTheOBDTech I checked and oil looks good. Would the best option be the vvt?

[@EliTheOBDTech]

@@jaquelinesapien1818 Not necessarily, since oil level is ok, but I wouldn't rule out a VVT problem. Another possibility would be fuel injectors being dirty/restricted or leaking. Would you by chance have a scantool? I would really like to see fuel trim data.

[@JTabor1976]

Ty for this video. I hope this is the issue with my car. I'm gonna have my mechanic replace mine asap.

[@roadstar499]

I switched plugs and coil packs 2 and 4 and still get misfire code in cycl 4 . So it can be a bad injector? What else could cause? Thanks..very good video...

[@EliTheOBDTech]

It can be a bad injector, harness issue or mechanical problem on cylinder 4. Let me also add, a faulty intake plenum gasket on that cylinder.

[@roadstar499]

@@EliTheOBDTech well I will install new packs and plugs and hope it solves issue..thanks

[@utubeu-ru4cc]

​@@roadstar499 wat happened

[@utubeu-ru4cc]

​@@roadstar499 did it solve it

[@sallyletherman2082]

Thank you! Seriously. :)

[@stephanieellis7495]

If I take my ignition coils out and the top of the spark plugs have no oil & the ignition coils have no oil on it but the bottom of my spark plugs have oil on it. Does it mean it is the pistons and not the valve seal?

[@EliTheOBDTech]

Hi there, four possible causes that come into mind: 1. Defective or worn valve guides 2. Defective piston compression rings. 3. Faulty head gasket 4. Broken piston head.

[@arturohernandez3872]

Thanks dude

[@notav6134]

Even if you see a little bit of oil on the ignition coil you still look a the valve cover for being the problem ????????

[@EliTheOBDTech]

It can, but I would still check for spark with a test light to see if the component can still produce strong Kilovolts.

[@EliTheOBDTech]

Moisture and spark do not get along.

[@christhopherlasher2828]

I just replaced that valve cover do those codes reset . i took it to a shop because it was that giving me problems starting after it has been driven... And they said multiple misfires.. so i was wondering if the code was old...

[@loweyes6457]

Did you get it checked out I got the code p0300 as well doesnt idle ruff I do notice sometimes it starts a little harsh tho

[@christhopherlasher2828]

@@loweyes6457 i did take it this week they didn't really look at it that well but they did reset the codes and i got it home and it didn't want to restart almost immediately i gave it gas and it chug started and then it runs just fine.. i have not tried to rerun the codes because i've been busy.. but i believe the multiple misfire is gone and it's just running lean but i replaced the map sensor a year to year and a half ago.. and replace the camshaft position sensor about 3 year ago.. and i thought i did the crank shaft position sensor a year ago once the codes were popping. I believe it may have to do with pressurization of the gas tank because that's where it started giving us issues.. other than the sensors the car is basically new.. everything under the hood except for the power steering pump has been changed within a year to a year and a half, even a full suspension job has been done. I bought this car with a blown head gasket that somebody had doctored with sealant.. so even the head gasket has been replaced and the heads have been shaved and inspected

[@nicoperez7809]

I changed out all my spark plugs because it wouldnt start . It ran perfect i started it up about 4 times. did a test run and everything. i tried to start it again 20 minutes later and its doing the same thing it was before i changed the spark plugs. what should i do?

[@EliTheOBDTech]

It almost sounds like a crank sensor that is glitching at moments. These sensors when they start to go bad, they tend to behave this way. Worst case scenario, maybe a fuel pump that's going bad. But it can be many things....

[@nicoperez7809]

@@EliTheOBDTech should i start with the crank sensor or fuel pump? I bought a coil and replaced each one individually and nothing

[@EliTheOBDTech]

@@nicoperez7809 Do you have a crank no start or no crank no start?

[@nicoperez7809]

Yes it cranks it just won't turn over.

[@EliTheOBDTech]

@@nicoperez7809 can you hear your fuel pump prime with ignition on?