Ignition issues
Thread Starter
Newbie
Joined: Aug 2017
Posts: 1
Likes: 0
Model: Cherokee
Ignition issues
Hey guys I got a 2005 grand cherokee 4.7. So driver side front coil pack keeps birning up. This issue has up stumped. Replaced coil and plugs. Had computer checked. Has power going into the coil pack but none coming out. Has anyone had this issue? Plz need help. Thank you
CF Veteran
Joined: Dec 2015
Posts: 2,139
Likes: 93
From: Syracuse, NY
Year: 1996
Model: Cherokee (XJ)
Engine: 4.0L
Do you currently have a check engine light on, or engine codes to mention?
Also, you may have more luck in the Grand Cherokee Section of the forum:
https://www.cherokeeforum.com/f5
Also, you may have more luck in the Grand Cherokee Section of the forum:
https://www.cherokeeforum.com/f5
Old fart with a wrench
Joined: Nov 2010
Posts: 14,398
Likes: 741
From: Manlius, east of Syracuse, NY
Year: 2000 XJ Sport & WJ Laredo
Model: Grand Cherokee (WJ)
Engine: 4.0L
You should check or replace the ignition capacitor on that bank. The coils are hot whenever the key is on and are grounded thru drivers in the PCM. They only spark when they are un-grounded. The capacitors are there to protect the PCM from the backsurge current when the coil's magnetic field collapses. They are mounted between the center 2 coils on each bank.
