rev's up to redline at startup
#1
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Year: 1999
Model: Cherokee
Engine: 4.0
rev's up to redline at startup
I have a 99 cherokee with the 4.0. I replaced the intake/exhaust gasket yesterday. After putting it all back together, as soon as it starts, it immediately rev's up. I have to shut it off b/c it will overrev if left running longer than 3 sec's. All the electrical connections are good, I have recently replaced the TPS/IAC. The only thing of note is that I scrubbed the block when I had the intake off and I replaced the O-rings on the injectors while I had the fuel rail off. I wiped each injector off and cleaned the accumulated varnish around the tips of the injectors with some carb cleaner and a rag. I am stumped as to what is causing this. Any ideas?
#3
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Year: 1999
Model: Cherokee
Engine: 4.0
Is it possible the new intake gasket is leaking? I don't have a torque wrench but I tightened the bolts down like I would've on any of the other motors I have worked on. I worked center out, tightened them incrementally, and got them pretty damn tight. The only thing I can think of would be TB gasket. I did reuse the old one.
#7
Caracticus Potts The Mod
I even saw once, where the guy tighten the heck out of it when it was hung up on the pins, cracked right through between cylinder 4 and 5
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#9
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Year: 1999
Model: Cherokee
Engine: 4.0
Problem solved. The intake was sitting an 1/8" low causing it to be propped up on the dowels. Very difficult to see without a big flashlight and really looking HARD. Thanks for help!
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