Top Issue- 02-05 Ford Thunderbird Ignition Coils COP

I have been following the forums for a couple months since getting my 2002 end of September. Very informative. Since then I read about top care and bought the recommended care kit. I read with horror about the exploding spare tire and immediately pulled my original out of the trunk and replaced with a new tire for about $60... quick easy fix. I had the car put on a lift and had the brace bolts torqued to 46. One bolt turned 1/2 turn, anotherturned 3/4 turn. Car with top down went from Feeling like it would fold in half when it hit a bump, to feeling tighter than with hard top on. All tips from different posts. Many thanks to you all.

I also read with great interest the posts about The coils and plugs and bought all the recommended parts and tools to try to tackle that job one day soon. Mine did have an issue while under top gear slight acceleration, a skipping that was probably a sign of a coil or plug that was needing replacement. Then about a week ago, I finally got the check engine light that I had been anticipating. And it was running especially rough. So here’s what I might be able to share that might help someone else....Autozone let me use their code reader to plug in and then bring inside to them to print out cause. It said small leak, evap system. They kinda scratched their head and said that could be about anything, and they couldn’t turn off the light for me. But this really nice lady at the desk pulled me aside and said buy a $16 gas cap, take the gasket, really an O ring, off the new one, put it on the one tethered to the car, and wait 100 miles and like magic all would be well. I figured $16 was not a bad investment to see if she knew her stuff. So far so good. No light, the car runs better than it has since I got it. No missing in top gear. I’ll still replace the plugs and coils at some point just to know they are fresh, but maybe an 18 year old O ring is causing someone to have an issue. Hope it helps someone and I can pay it forward like that nice lady at Autozone did for me.
 
Hello, Just purchased an 03 with 51k miles. The engine light came on and the scan showed cylinder 7 misfire. In the process of replacing all of my coils and plugs, i noticed the spark plug for cylinder 7 was dripping with oil. I believe this is evidence of a leaking gasket somewhere. My question is should I bother continuing to replace the coil packs and plugs knowing I haven't fixes the root cause?

Also does anyone know why there would be oil on just the one plug?

This a great community and resource to have. Thanks in advance.
 

tbird.blue

Well-Known Member
Hello, Just purchased an 03 with 51k miles. The engine light came on and the scan showed cylinder 7 misfire. In the process of replacing all of my coils and plugs, i noticed the spark plug for cylinder 7 was dripping with oil. I believe this is evidence of a leaking gasket somewhere. My question is should I bother continuing to replace the coil packs and plugs knowing I haven't fixes the root cause?

Also does anyone know why there would be oil on just the one plug?

This a great community and resource to have. Thanks in advance.
Hello, this will likely be the valve cover gaskets. They get less flexible with the extreme heat of the engine. There are o-rings around each of the spark plugs which will be the source of the leak. New valve cover gasket set is the only answer,not expensive but a bit of labour involved, particularly on the driver's side and involves the fuel line to be depressurized and split at the connection above the valve cover. Try Rock Auto where you have a choice of gasket brands. I've just done mine on both sides. Good opportunity to replace the o-ring at the base of the oil filler tube too. It's not a hard job, just a bit hard to get to some bolts. Good luck Ian
 
Original replacement parts number begin on page 216 of the owner’s manual. (I have original manual but I’m taking that page number from the pdf version.). Original motorcraft number is AGSP-32F. Years ago, Before platinum and iridium plugs, I remember having to change them, and the distributor points, pretty often. But you could access them pretty easily then too. Nothing like the nightmare packaging under hoods today.
 
I would definitely replace all the coils and all the the plugs too. Make sure you use never-seize on the plug threads and di-electric grease on the coil end that slips on the plugs. I usually watch you-tube videos on any project that I'm about do myself. It saves a lot of of grief.
I'd also like to say even if a spark plug looks fine there can be something wrong or weak on the inside. It happened to me on a one cylinder Kohler motor and cost me weeks of useless work and replacement parts I didn't need. I took the motor to an expert and he did everything he knew and couldn't get it started. Baffled, he just put a plug in as a last resort and it ran perfect.
That plug probably cost me a grand or so. It must have come apart inside with no signs of trouble.
Needing to replace coils on my 05. Any recommendations for a decent coil would be appreciated. Have seen them priced all over the place and am at a loss ..... Thanks!
 

biddle

Forum Moderator
Staff member
Needing to replace coils on my 05. Any recommendations for a decent coil would be appreciated. Have seen them priced all over the place and am at a loss ..... Thanks!
The bold type words are links that go to the recommended products.

 
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