This 2003 Nissan Altima misfire diagnosis. Lesson for this video, never diagnose without a visual inspection.
Пікірлер: 99
@lur39502 ай бұрын
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
@EliTheOBDTech2 ай бұрын
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.
@lur39502 ай бұрын
@@EliTheOBDTechOk!! Thank you! I'm going to check that. I'll let you know
@XenomorphLV4263 жыл бұрын
I have p0300 that comes and goes. No oil leaks. Going to replace my coil packs, since they're 15 years old now.
@EliTheOBDTech3 жыл бұрын
Perhaps spark plugs as well.
@JTabor19763 жыл бұрын
Ty for this video. I hope this is the issue with my car. I'm gonna have my mechanic replace mine asap.
@mb16363 жыл бұрын
Its a valve cover gasket...its simple work replace fix.
@christhopherlasher28283 жыл бұрын
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
@EliTheOBDTech3 жыл бұрын
When I get a chance, I'll look it up. Year, make and model?
@christhopherlasher28283 жыл бұрын
@@EliTheOBDTech 2002 nissan altima s 2.5 liter
@EliTheOBDTech3 жыл бұрын
@@christhopherlasher2828 The knock sensor seems to be just below the exhaust manifold, bolted to the cylinder head.
@EliTheOBDTech3 жыл бұрын
@@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.
@ProphetsAmongUs3 жыл бұрын
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?
@EliTheOBDTech3 жыл бұрын
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.
@johncasey43103 жыл бұрын
@@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
@yessicastro72364 жыл бұрын
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.
@EliTheOBDTech4 жыл бұрын
Some it's multiple issues. I'm glad you fixed your problem.
@occckid123 Жыл бұрын
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.
@ronniefletes92Күн бұрын
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
@EliTheOBDTechКүн бұрын
@@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.
@robertwalker92115 ай бұрын
Great job sir 😊
@kathleenowen55243 жыл бұрын
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?
@EliTheOBDTech3 жыл бұрын
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.
@kathleenowen55243 жыл бұрын
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.
@juniorotero90302 жыл бұрын
@@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
@EliTheOBDTech2 жыл бұрын
@@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.
@bda7dd302 жыл бұрын
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
@EliTheOBDTech2 жыл бұрын
You might a faulty ignition coil pack that's not firing.
@Ggg-ef6vb3 жыл бұрын
P0420 nice.
@TRCustomAirbrushTumblers3 жыл бұрын
Thank you Sir
@EliTheOBDTech3 жыл бұрын
You're welcome!
@sarcastic_2uNY3 жыл бұрын
Mine don't have any oil on them, how else can you tell what coil is bad? Without any oil. Curious
@EliTheOBDTech3 жыл бұрын
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_2uNY3 жыл бұрын
Thank you very much! 😉👍
@TheRebuilt15 жыл бұрын
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.
@EliTheOBDTech5 жыл бұрын
I definitely agree with you with programming issue, not being able detect specific cylinder misfires.
@jrsblogs5 жыл бұрын
So cam position sensor is failing?
@walidamran Жыл бұрын
Thanks a lot 😊
@ceeceecb8 Жыл бұрын
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 Жыл бұрын
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 Жыл бұрын
Forgot to mention, fuel delivery issue or cam/crank sensors
@BlackWhite-ru8gm5 ай бұрын
Did you ever figure out what was wrong with your vehicle? Mines is doing the exact same thing.
@jaquelinesapien18182 жыл бұрын
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???
@EliTheOBDTech2 жыл бұрын
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.
@jaquelinesapien18182 жыл бұрын
@@EliTheOBDTech I checked and oil looks good. Would the best option be the vvt?
@EliTheOBDTech2 жыл бұрын
@@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.
@johncasey43103 жыл бұрын
What if it keeps happening evan after replacing valve cover and seals
@EliTheOBDTech3 жыл бұрын
You will need to verify that your ignition system is working find, such as your Coil on plugs and spark plugs. Perhaps injectors, etc....
@motovibeminnesota79552 жыл бұрын
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.
@danielsalinas56544 жыл бұрын
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
@EliTheOBDTech4 жыл бұрын
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.
@georgen7489 Жыл бұрын
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 Жыл бұрын
Is the check engine light on?
@everardocamacho50636 жыл бұрын
Great video eli, where are located, what city?Thank you
@EliTheOBDTech6 жыл бұрын
In Pomona, CA
@everardocamacho50636 жыл бұрын
Thank you eli for your quick response, cheers
@Official.Nando3175 жыл бұрын
Eli TheOBDTech hey I need some help
@sallyletherman20824 жыл бұрын
Thank you! Seriously. :)
@stephanieellis74955 жыл бұрын
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?
@EliTheOBDTech5 жыл бұрын
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.
@lashan46364 жыл бұрын
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
@EliTheOBDTech4 жыл бұрын
Perhaps, but it also depends if coils are coated with oil fully. A p0300 could also be triggered by a faulty crank sensor.
@roadstar499 Жыл бұрын
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 Жыл бұрын
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 Жыл бұрын
@@EliTheOBDTech well I will install new packs and plugs and hope it solves issue..thanks
@utubeu-ru4cc Жыл бұрын
@@roadstar499 wat happened
@utubeu-ru4cc Жыл бұрын
@@roadstar499 did it solve it
@christhopherlasher28283 жыл бұрын
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...
@loweyes64573 жыл бұрын
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
@christhopherlasher28283 жыл бұрын
@@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
@notav61345 жыл бұрын
Even if you see a little bit of oil on the ignition coil you still look a the valve cover for being the problem ????????
@EliTheOBDTech5 жыл бұрын
It can, but I would still check for spark with a test light to see if the component can still produce strong Kilovolts.
@EliTheOBDTech5 жыл бұрын
Moisture and spark do not get along.
@arturohernandez38725 жыл бұрын
Thanks dude
@Elphxdav4 жыл бұрын
Doesn't help me. Mine are all dry
@EliTheOBDTech4 жыл бұрын
What codes do you have?
@Elphxdav4 жыл бұрын
@@EliTheOBDTech p0300
@EliTheOBDTech4 жыл бұрын
@@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.
@EliTheOBDTech4 жыл бұрын
Forgot to mention, a faulty crank sensor can also cause a p0300.
@Elphxdav4 жыл бұрын
@@EliTheOBDTech thanks
@nicoperez78093 жыл бұрын
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?
@EliTheOBDTech3 жыл бұрын
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....
@nicoperez78093 жыл бұрын
@@EliTheOBDTech should i start with the crank sensor or fuel pump? I bought a coil and replaced each one individually and nothing
@EliTheOBDTech3 жыл бұрын
@@nicoperez7809 Do you have a crank no start or no crank no start?
@nicoperez78093 жыл бұрын
Yes it cranks it just won't turn over.
@EliTheOBDTech3 жыл бұрын
@@nicoperez7809 can you hear your fuel pump prime with ignition on?