Hello Bosses,

Car jerks at traffic but drive smoothly when foot is on gas. Scan the car and got a misfire code P0300, P0301, P0302,P0303 and P0304.

Plug has been replaced with new one, fuel pump also replaced and TPS also replaced, code was cleared and car runs smoothly but after 2 hours of driving, check enginelight came up again, scan the car same misfire code comes up again.

Gurus kindly advice and assist

CC: Gazzuz, Mayor, Nobody, diportive, kingdrien and all car gurus in the house..

That 2AZ and misfire are like 5 and 6 Oga Gazzuz come and help lol

Did you solve your misfire??

Not yet boss, but car misfire has reduce after I removed and replaced negative battery terminal after 30sec.

Misfire only happen now at cold start, same stops after 3 to 5mins of driving.

Thanks for the concern Boss.

Hi,
Pls I make use of a carmy V6, 04 model. I have been experiencing check engine Light on. I scanned the car it showed p0300,p0301,p0305 cylinder misfire. Have changed the plugs to newer ones, the whole six, cleaned the injector. After doing this I toot on a short trip the Cel light didn't appear, But still after going on the 2nd trip next day, CEL comes up, when I scan, the same code pops on....

I need help in resolving this issue. Kindly assist.

Okoyedavid3:
Hi,
Pls I make use of a carmy V6, 04 model. I have been experiencing check engine Light on. I scanned the car it showed p0300,p0301,p0305 cylinder misfire. Have changed the plugs to newer ones, the whole six, cleaned the injector. After doing this I toot on a short trip the Cel light didn't appear, But still after going on the 2nd trip next day, CEL comes up, when I scan, the same code pops on....

I need help in resolving this issue. Kindly assist.

Since you have changed plugs and still same.
Swap ignition coils, take 1 to 2 and 5 to 6. Clear the code, let's see if the misfire will come to cylinder 2 and 6, if it does your ignition coils is bad but if it still remains on 1 and 5, there is an issue with the cylinder.

Okoyedavid3:
Hi,
Pls I make use of a carmy V6, 04 model. I have been experiencing check engine Light on. I scanned the car it showed p0300,p0301,p0305 cylinder misfire. Have changed the plugs to newer ones, the whole six, cleaned the injector. After doing this I toot on a short trip the Cel light didn't appear, But still after going on the 2nd trip next day, CEL comes up, when I scan, the same code pops on....

I need help in resolving this issue. Kindly assist.

P0300 Causes
Faulty or worn spark plugs *
Faulty spark plug wires or coils *
Distributor failure *
Faulty fuel injector.
Vacuum leak.
Low fuel pressure.
Camshaft sensor defective.
Crankshaft sensor defective.

melviniyke2002:
P0300 Causes
Faulty or worn spark plugs *
Faulty spark plug wires or coils *
Distributor failure *
Faulty fuel injector.
Vacuum leak.
Low fuel pressure.
Camshaft sensor defective.
Crankshaft sensor defective.

Kindly help figure out before I sell the car please.

https://www.nairaland.com/6166411/scan-information-jalopy-written-out

melviniyke2002:
P0300 Causes
Faulty or worn spark plugs *
Faulty spark plug wires or coils *
Distributor failure *
Faulty fuel injector.
Vacuum leak.
Low fuel pressure.
Camshaft sensor defective.
Crankshaft sensor defective.

Thanks... Have managed to get some tools like a multimeter checked the ignition coil and discovered one to be bad...of which I replaced, car now running smoothly, I don't feel any usually vibrations or misfire, car revs fine at idle.. But then again after doing 21miles misfire code comes up.... P0300,p0301 and p0305.

Pls what could be the cause of this, kindly assist as I don't like seeing the CEL on.

Okoyedavid3:


Thanks... Have managed to get some tools like a multimeter checked the ignition coil and discovered one to be bad...of which I replaced, car now running smoothly, I don't feel any usually vibrations or misfire, car revs fine at idle.. But then again after doing 21miles misfire code comes up.... P0300,p0301 and p0305.

Pls what could be the cause of this, kindly assist as I don't like seeing the CEL on.

You are having random misfire. Change the PCV valve, that is a cheap fix

homeboy205:




You are having random misfire. Change the PCV valve, that is a cheap fix

Will check. Thanks

Okoyedavid3:


Thanks... Have managed to get some tools like a multimeter checked the ignition coil and discovered one to be bad...of which I replaced, car now running smoothly, I don't feel any usually vibrations or misfire, car revs fine at idle.. But then again after doing 21miles misfire code comes up.... P0300,p0301 and p0305.

Pls what could be the cause of this, kindly assist as I don't like seeing the CEL on.

Boss na OCV. Bring your car I will fix it.

Dear OP, has the car been fixed?

Okoyedavid3:
Hi,
Pls I make use of a carmy V6, 04 model. I have been experiencing check engine Light on. I scanned the car it showed p0300,p0301,p0305 cylinder misfire. Have changed the plugs to newer ones, the whole six, cleaned the injector. After doing this I toot on a short trip the Cel light didn't appear, But still after going on the 2nd trip next day, CEL comes up, when I scan, the same code pops on....

I need help in resolving this issue. Kindly assist.

Chairman have you also fixed your car?

It's best practice to let us know if an issue on a vehicle has been fixed and what was done to fix it. It completes the learning curve and help persons with similar issues get direction on how their car issues can be fixed.

My 2cent

Mottomata:


Chairman have you also fixed your car?

Haven't got the time yet. Am planning toward next week.

Okoyedavid3:



Haven't got the time yet. Am planning toward next week.

Mech has checked the PCV.. said it in good working condition.