No power and backfire
10-21-2012, 11:37 PM
#17
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Join Date: Oct 2012
Location: Central NJ
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Year: 01
Model: Cherokee
Engine: 4.0
start over
your backfire is typicaly going to be a mecanical failure or a timing problem. its pretty clear that if your problem is still unchanged with the parts you put on so, it would be perfectly reasonable to rule out all repairs you have done and now to question the quality of them. start over from the start with simple diag, is backfiring out the intake or exhaust, under what throutle position, does it idle, how often does it backfire and at what rpm?
10-22-2012, 04:27 AM
#18
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Location: Landers, CA
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Year: Several
Model: Cherokee
Engine: 4.0
Whoever told you BOSCH plugs was OEM LIED!
I'm surprised you didn't have trouble with them long ago.
Look at your underhood label to see what the factory used.
I'm surprised you didn't have trouble with them long ago.
Look at your underhood label to see what the factory used.
10-22-2012, 05:37 AM
#19
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Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
Mark the calender, Don agrees with Rich!
Pretty safe bet it is some sort of Cherokee. Guess he said he has more than one 02 sensor, so he's Not Renix, and not 99-02, probably not Diesel or 4cyl.... I'm gonna guess a 91 to 98 4.0 with an automatic? (just a probability stab at the trans). Oh..the problem...I forget....
10-22-2012, 06:43 AM
#20
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Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
Dt>, pretty sure the down-stream 02 doesn't affect the running, it's just a smog thing. That said, it's sensor feed, and heater power might be shared with something that maters, but it's input can only signal a cat problem...I think.
Last edited by DFlintstone; 10-22-2012 at 06:45 AM.
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