High rev after lifter swap
07-22-2015, 08:00 AM
#1
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Model: Cherokee
High rev after lifter swap
I just replaced lifters in 2002 grand cherokee 4.0. I put everything back together and when I start it it want to rev to the max. I retorqued intake, checked all electric connections and vacuum hose. Any ideas on what would do this?
07-22-2015, 11:16 AM
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Ive checked all vacuum hoses. When I unplug map sensor. It does not rev high just runs bad. I can control throttle with peddle it just misses bad. This is not making sense at all.
07-22-2015, 11:28 AM
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Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
You likely have a big vacuum leak somewhere, or something is holding the throttle open. Did you pull the injectors? Those lower O rings can leak vacuum. Use water from a dish soap bottle to check?
Also, I'm not sure how fast it would go with the IAC stuck open.......
Also, I'm not sure how fast it would go with the IAC stuck open.......
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