spark and fuel but no start
#1
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Join Date: Jul 2009
Location: Bremerton
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Year: 87
Model: Cherokee
Engine: 4.0
spark and fuel but no start
Heres one for ya. I have an 87 with a new 4.0 and it starts when it wants to. It cranks good, plenty of fuel, and good spark. Tested the cps and its good. I have spark at all six plugs. Heres the kicker even with spark and starting fluid it wont start. I couple others and I think it may be the ecm? Just seeing if you guys have any ideas?
#3
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Join Date: Mar 2011
Location: fort collins CO
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Year: 93
Model: Cherokee
Engine: 4.0 HO. aem induction
check the TPS, and IAC. they might be sticking, or your throttle body might be super dirty/carbon deposited. check those and see. I had the same issue for a bit. if none of those things fix it, check to see if your coolant temp sensor is bad-if it reads a low temp, it will overfuel itself to get up to operating temperature and too much fuel will cause starting issues.
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