Backfiring through my throttle body on warm up? help me please!!
10-27-2010, 10:08 PM
#1
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Year: 1998
Model: Cherokee
Engine: 4.0L
Backfiring through my throttle body on warm up? help me please!!
Okay so here it goes... I have a 98 xj and it backfires and loses power then gains it if i mash the pedal but also backfires until its up to temperature! And it did it once before then stopped for a long time but just recently started to do it again... I have heard and read u bunch of different theories but I wanna see what everyone here has to say before I start digging in on Saturday so please help me out its driving me insane thanks a million!!!
10-27-2010, 10:13 PM
#2
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Year: 87-99
Model: Cherokee
Engine: 4.0
My 97 has this same problem, I've run scanner after scanner on this issue, the only thing I can come up with is the 02 sensor wiring. Haven't had a chance to trace the wires back and look for a break, but my suspect is a faulty ground somewhere in there.....
10-27-2010, 10:29 PM
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Year: 1989 Laredo
Model: Cherokee
Engine: 4.0 Inline 6 Renix
Sounds like you are running WAY too RICH, I would say O2 sensor, let us know if you figure it out. Good Luck.
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