So my daughter bought a 1998 Grand Cherokee Laredo 4.0L with a bad engine. I was able to start it a couple times before realizing that they (previous owners) had ruined the engine. It was idling fine when I was able to start it.. So anyway, I changed the engine with one that had only 130k. Here's the main problem... When I first started the engine the quickly ran up to 4000RPM, when I touched the gas pedal to get it to go down, it went up to 5000RPM. I don't let it run any longer than about 45 seconds.
What could it be ?? ANY help would be greatly appreciated.
What could it be ?? ANY help would be greatly appreciated.
4000+RPM Idle
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