hey all, so my truck threw the #7 cylinder plug a while back, i bought a cylinder head repair kit as well as a new ignition coil to go with it. i got everything installed and put back together, but cylinder 7 is still misfiring upon start up and im still getting exhaust leak from the cylinder head. any advice on how to stop that?

 

or any ideas as to what might be causing these persistent problems?

 

What is the misfire code? A 307 or a 357?
Tell more about an exhaust leak, where is it and what have you done.
Good luck.

 

can't remember the code, had it run at AutoZone. and when it originally threw the plug it was leaking exhaust through the open cylinder.now that i put the cylinder head repair kit which rethreads the cylinder head and comes with a new plug and wiring its running and idling fine but accelerating and constant speeds are still causing it to leak exhaust through the repaired cylinder head.

 

Using a TIMESERT repair correctly should have resulted in a good repair.
Technically, if the cylinder is losing combustion pressure the crank will sense it as low rotation time and can report it as a misfire since it cannot determine what has caused the lower rotation time so reports as a 307 code.
The 'outside world' has to determine the cause.
Leaking exhaust can burn and deteriorate the coil boot and apply extra heat to the coil.
Hope this helps in understanding what the cause is.
Good luck.

 

well ive now replaced the cylinder plug a second time, this time using a thread locker, by the sound i can tell its worked itself out again and that the threads are not biting, so rather then continue to spend money on cylinder repair kits and coil packs, do you by chance know where i might be able to find a replacement for the *object (my apologies im no good for a lot of automotive terms) that houses the cylinder plugs? i figure it will be cheaper in the long haul if i just replaced the entire cylinder plug manifold ( for lack of better term), and get all new plugs and coils versus trying to just save the one faulty plug since its not working and just costing me money

 

It's called a cylinder head, and you can look it up on rockauto or other car part websites for a price. Replacing a chain-driven overhead cam cylinder head requires a lot of careful work with all the right tools, and is not a simple "take old one off, bolt new one on" type of job.

Bluegrass mentioned the Timesert repair, which is the only Ford-authorized method of repair, IIRC.

Timesert's website:
++ TIME-SERT Threaded inserts for stripped threads, threaded inserts, thread repair stripped sparkplug's, Ford sparkplug blowouts, threaded inserts threaded, repair stripped threads, stripped threads, inserts threaded inserts, Ford spark plug repair,

Timesert for Ford modular engines:
++ Ford Spark plug Repair ++, ford spark plug blow outs, blow out spark plug ejection blow out, blown out sparkplugs, ford stripped spark plug, ford sparkplug blow outs, spark plug blow out ford, ford defects, ford spark plug repair ford, ford spark

They have an installation video you can play to see how it works.