Coil Pack

jeep
wrangler

#1

I have a 2004 Jeep Wrangler. This will be my third time to replace my coil pack since June/2010. What can be the root of the problem, causing these coil packs to go bad?


#2

Is it really a coil pack (two or three coils and has spark plug wires going to four or six plugs), or is it a COP (Coil On Plug, one coil going directly to one plug).

If it’s a COP, then it’s either the spark plug or that oil or water is accumulating in the plug well.

If it’s really a coil pack, then you can add the spark plug wires as suspects too.

Anytime you change coil(s) the associated spark plugs should be changed too, every time.


#3

Make sure the correct plugs and wires are installed and check the wires for any signs of leakage (arcing). Make sure the power to the coil is ok also.


#4

It’s a true coil pack. Thank you for your replies.


#5

What engine do you have?


#6

Is the coil pack located in a spot where it might be subjected to excessive heat if there were a heat shield missing, or perhaps an exhaust manifold leak?