p300 random missfire
02-04-2012, 06:01 PM
#2
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Join Date: Nov 2010
Location: In the middle of Minnesota!
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Year: 1999
Model: Cherokee
Engine: 4.0
Look for a "common cause" for random misfire code (P0300)
1. First thing I do is to verify exact fuel pressure with a gauge
2. You should also perform a comprehensive search for a large vacuum leak
1. First thing I do is to verify exact fuel pressure with a gauge
2. You should also perform a comprehensive search for a large vacuum leak
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