Just purchased a 2000 Jeep Cherokee and I think I'm screwed. Check engine code P0303.
01-20-2014, 01:00 PM
#31
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Location: Edmonton,Canada
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Model: Cherokee
Engine: 4.0 H.O
I would replace coil pack, put new plugs/ wires in and refresh all the grounds. I had a similar problem, random misfire. One of my plug wires was arcing because they were really old. Replaced the above and it fixed it.
01-20-2014, 02:20 PM
#32
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Year: 1998
Model: Cherokee
Engine: 4.0
I believe he has tried swapping plugs and coils, and it doesn't have plug wires.
01-20-2014, 04:26 PM
#33
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Year: 2000
Model: Cherokee
Engine: 4.0
Had the same code on my 2000 xj 4.0. I noticed once I removed the power wire from the injector there was some corrosion on the injector pins. Once I cleaned that up cleared the code I haven't seen a return for a least three weeks.
* noted you changed the injector, but check for corrosion at the injector plug.
* noted you changed the injector, but check for corrosion at the injector plug.
Last edited by peelman; 01-20-2014 at 04:29 PM.
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