Hello all! I've looked through some previous posts about this subject, which has been helpful, but I could still use some help. I have a 2001 F150 Super Crew (5.4L/2V, 2 wheel DR, automatic transmission) running a little rough (especially when cold) and after checking with a OBDll scanner got a P0302 code(misfire number 2). Had to drive the ruck on a couple of short trips for medicine over the last few days, but finally got some time to take a look at the truck yesterday. Went to start it to move the truck to a better place to work on it and the truck ran great - NO Misfire at all? Right now the truck starts/runs great so I will clear the codes and wait for the misfire to happen again. In doing some research on the internet, I came across some info that this could be caused by a loose/broken COP connector pigtail. I guess they can get brittle after a while and the tab that holds them on to the cop breaks. Anyway, I will check for that but I am wondering if anyone here has repaired and/or changed out these pigtail connectors, and if so - how? I saw a YouTube video where a guy does a repair on a bench - but not in the truck. Anyone know of a video where the repair/replacement for these pigtail connectors are replaced on a 5.4L? Also, I came across 1 pigtail replacement for $25.49 at AutoZone - for 1 connector!! Anyone know a source for these connectors that isn't so expensive? The reason I'm driving old cars & trucks, and trying to fix them myself, is because I CAN'T afford to send it to a mechanic. As always, any and all help is greatly appreciated!

 

I would not assume the problem is the pigtail. I'd check the plug(s) and swap coils with another cylinder first. It could very well be either. My 02 has 170,000 miles on it and no problem with the pigtail yet.
Is this what you were talking about?
https://www.rockauto.com/en/catalog/...connector,2592

 

Here's 8 pigtails for 9 bucks.

https://www.ebay.com/itm/282075618614

 

Wait! The pigtails, if they fail, are not likely to cause a P030X DTC - they'd cause a P035X code due to an intermittent electrical circuit.

The most common reasons for a P030x code is a faulty spark plug, a degraded COP boot, or the COP itself is breaking down internally when it fires I don't see any indication in your post that you've checked any of these.

 

Thanks, bettter than the $25 bucks a piece at AutoZone. Ever changed any? Also, ! I have a spare COP so naturally I expect the problem to be with what I don't have handy/ready (story of my life) either the connector to the COP or the spark plug itself. . I will see if I can get a Motorcraft spark plug in case that looks bad when we check out the COP. Any sources for some Motorcraft plugs (or equivalent) for this truck?

 

Before buying anything, it would be advisable to do some simple troubleshooting. Swap the COP and the plug ONE AT A TIME, with an easily accessible cylinder and see if the misfire moves or stays.

Local auto parts store should have the plug9s). Call and ask them. Otherwise, any Ford dealer's parts department will have them.

 

Spark plugs: https://www.rockauto.com/en/moreinfo...7212&jsn=10609

Coils: https://www.rockauto.com/en/moreinfo...7060&jsn=10657

Boot and spring kits: https://www.rockauto.com/en/moreinfo...0150&jsn=10670