P0304 (engine Missfire-cylinder # 4)

neto1978 · April 24, 2009

MY TRUCK IS ONLY 16KMILES ,I USE E85 ,I RESETED 6 TIMES THE DTC P0304 ,WHAT IT COULD BE :

INJECTOR # 4 ?

SPARK PLUG #4 ?

TKS A LOT.

Norseman · April 24, 2009

Check the plug first. Then go from there.

jimbello · April 25, 2009

MY TRUCK IS ONLY 16KMILES ,I USE E85 ,I RESETED 6 TIMES THE DTC P0304 ,WHAT IT COULD BE :

INJECTOR # 4 ?

SPARK PLUG #4 ?

TKS A LOT.

I looked on Alldata but cant find the troubleshooting tree for it. One question, You have a 2008 vehicle, and only 16,000 miles right??? Warrenty should be in effect, Take it to the dealer (if you can that is) and let them deal with the headache of finding the problem

98 Z71 SLT · April 25, 2009

Ignition coil.

Warranty.

Use it.

Zembonez · April 25, 2009

Check the plug first. Then go from there.

+1

Even a low mileage CAN spit up a piece of carbon and foul out a plug. It's the most likely place to start. If that's not it, I'd be off to the dealer for a little warranty visit..

jimbello · April 25, 2009

Check the plug first. Then go from there.

+1

Even a low mileage CAN spit up a piece of carbon and foul out a plug. It's the most likely place to start. If that's not it, I'd be off to the dealer for a little warranty visit..

Not that I'm cheep or anything but with the price of a plug these days and what a royal pain it is to get to them I would let the dealer worry about it and use that expensive warrenty

redvett · April 25, 2009

I second the warranty.

Zembonez · April 25, 2009

Check the plug first. Then go from there.

+1

Even a low mileage CAN spit up a piece of carbon and foul out a plug. It's the most likely place to start. If that's not it, I'd be off to the dealer for a little warranty visit..

Not that I'm cheep or anything but with the price of a plug these days and what a royal pain it is to get to them I would let the dealer worry about it and use that expensive warrenty

Probably an even better idea.