1997 backfire issue
Thread Starter
Newbie
Joined: Jan 2017
Posts: 2
Likes: 0
Model: Cherokee
1997 backfire through intake and exaust over 1500 rpm
Hi, I have a 1997 grand cherokee Laredo 4.0 4x4 that idles great, but won't rev over about 1500. It backfires through the exaust and intake when I try. I've tried new cap, rotor, pick up coil, crank sensor and new pcm I love the jeep, but it's driving me crazy trying to figure this out any help would be much appreciated!
Last edited by bosshoss; Jan 7, 2017 at 07:39 AM. Reason: more info
CF Veteran
Joined: Jan 2012
Posts: 2,208
Likes: 5
From: Ocean County, NJ
Year: 1998
Model: Cherokee
Engine: 4.0L
Have you done any actual diag besides throwing parts at it? Dave gave great advice, check the TPS. A faulty TPS can cause similar issues to what you're experiencing.