01 every cylinder missfire.

[jbb421]

My buddies 01 gp is misfiring on every cylinder, but is only throwing a code for cyl 1 misfire it also stops missing as soon as you apply any throttle. Also here is this hope it helps. plugs are also factory gapped, and has a new reman injector on cyl 1... I checked all the valves when i put headgaskits on it they seemed to be fine, no signs of burning and didn't leak at all. Thanks! hope y'all can ease our headache.

 

[BillBoost37]

Have you triple checked the firing order and ensured the coils if labeled are in the proper places?

 

[jbb421]

Yup firing order is good. I've checked it probably 20 times, and even put a new coil temporarily in place of the 1&4 coil to see if that was the issue. Even though 4 isn't missing as much as 1.

Thanks for the reply.

 

[FordMan77]

Have a spare ICM laying around?

 

[mskram1]

how long after head gasket change did this happen??? improperly sealed gasket??? just suggestions but compression test may be in order

 

[jbb421]

wouldn't it be loosing coolant if it was a head gasket? and im sure we can get one try it and return it fordman... Guess ill do compression test tomorrow... what #s should be expected?

 

[BillBoost37]

~180psi. =/- about 5% is acceptable.

You know.. I have seen something screwy like this in the past. Try a crank learn. aka case learn.