Xj randomly accelerating on its own!!
#33
98 jeep xj
Hello, guys my I am having similar problems with my 98 jeep cherokee xj I just recently changed the cylinder head after I finished putting another one back, i got everything done and then I I fired it up the rps who all the way up its accelerating byitself hard as if I was putting the gas pedal all the way in. I first disconected the cable and then then all the connectors that go to the throttle body and still does that thinking it was the idle air sensor but no, vaccum line either .... what do you guys think it could be.
#34
Old fart with a wrench
Here's something you can check. Disconnect the throttle cable at the TB and try pulling/pushing it. Chevys had a tendency to break wire strands inside the cable cover and cause sticking.
#35
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Join Date: Aug 2011
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Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
If the throttle plate is closed and it's revving, it's getting air from somewhere else. Did you use the same manifolds, and did they go on nice and flush? Maybe you missed something like the line to the power brakes....even the EGR I suppose might be an issue. It can't rev without air.
#36
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Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
Welcome to CF Javier.. Wow a thread from 3/13! Wonder if any of them are still around...
Last edited by DFlintstone; 07-30-2016 at 12:56 AM.
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