Hey guys, Kevin here and I'm having a problem with my stang. As all of you well know I'm getting an error code of P0351 along with a major loss of power and a funny sounding car. My code reader says igniton coil A primary/secondary circuit. I was wondering if it is something I can fix or the dealer has to fix this? Is it costly? And generally what I would have to do to fix it. Thanks in advance guys.

 

Easy fix. Your reader should also tell you which cylinder # is misfiring, that way you can pinpoint the exact coil that's bad. The new coil costs around $50 at most parts stores, install is about 5 minutes.

 

Ok cool, so is there a special kind of grease the coil packs need on them before I install because I didn't put any on them, but I will check, I just bought those coil packs. I thought it was something more serious then a coil pack tho when it said ignition coil A.

 

Here's what the shop manual says about P0351, the #1 cylinder is frontmost on the passenger side.

If the connector is solidly plugged in then it is most likely a bad COP, or possible a problem in the PCM.

Read the COP "sticky" to find out more about COPs and how to test them, etc.

In theory there is nothing about your car that the dealer "has to fix", and realistically very little other than a few things where expensive tools are needed. The only things separating you from the dealer are KSAs (Knowledge, Skills, and Abilities).

The basics of the knowledge part is the easiest. Buy (and read of course) some books about engine fundamentals, and then get the factory shop manual for your car. The skill and ability parts require only that you exercise your new found knowledge--baby steps at first.

However if you do exercise your knowledge and bolster and expand it (and gain skills and abilities) with practical experience, in no time at all you will be capable of telling the dealer how to do things right...

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"I saw a man start a fire once by rubbin' two sticks together, I reckon he weren't no smarted than me."
-Jeremiah Johnson ca. 1840

 

Great responses guys I really appreciate all of your help, this next couple if questions would totally help me fix the problem. Ok let's say it's the PCM? How do I go about fixing it?!? And is there some kind of grease I need to put on the coil pack boots when installing.

 

Im having the same problem with my vic. But the code I get is. P0352 Ignition Coil Primary B / Secondary Circuit Malfunction, all the cops are new about 8 months old and the spark plugs were replaced a year ago. I starts fine, its when its idling in drive(in park its ok)it will go rough. But when I start driving it will drive rough until about 40 mph, then snap out of it and drive fine and have full power again. Also it doesn't do it when its cold, but when the motor gets to full operating temp, thats when it all starts, and it wont do it with a/c on.

No you dont need any grease for the boots, but I wouldn't hurt to put some on the end that meets the plug.

 

You will need a new PCM, or send it off to a shop that specialises in repairing them. But don't assume the worst case yet--pull off the COP and do the simple resistance tests ststed in the COP sticky...

No grease is needed, or recommended, though some do put a small amount of dielectric grease on the plug end of the boot.

BTW--here's what a COP looks like, with the boot removed...

 

The first thing to do it pull and examine the plugs, then when you put it all back do two things--put the plug that came from the #2 bore onto another cylinder (keep track of where of course) and then mark the #2 COP and move it to a different cylinder (not #2 and not where ever you relocated the plug--if the problem moves you have found the cause.

How many miles on the plugs ("a year ago" means nothing), what type are they?

 

They are standard motorcraft plugs with about 9000 miles on them. I'll start moving the coil and plug to see if it moves with them. God I hope so, I really dont wanna dish out for a PCM.

 

Here's an update to my problem, I did move the plugs and the coils, and the error message is still at the same spot, i also pull the coil pack plug on spot A, and in fact the same one,with a different plug and coil , still makes no difference when unplugged. So is it my PCM nos that this test has been done? what is the technical name for pcm ?