Question about 1999 Jeep Grand Cherokee

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After doing sum mechanical repair , Put everthing back together an started up an engine runs wide open with or without giving throttle

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This sounds like part two of your other question....make sure throttle return spring is in place and that the throttle cable is free to move and not holding the throttle open. If you had the intake manifold removed, make sure it isn't leaking. If the idle was fine before you did whatever repair you made, most likely you have something put together wrong or left a hose off somewhere..

Posted on Nov 12, 2010


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1999 Cherokee starts but won't keep running without giving it throttle.

Assuming everything is working correctly, you may have to drive it up to 50 miles for the computer to relearn the basic perimeters.
I think you can also turn the key on, open the throttle to wide open, then close it 2 or 3 times to reset the memory in the computer.
Not sure about Jeeps.

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After i changed the battery in my 98 new beetle the idle wasnt correct and i had driven it so the ecu can relearn the idle and it still hasnt relearned it i had let it set over night and the next morning...

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The only way an engine can run Wide open is if the throttle plate is opened all the way, allowing a large volume of air in to the engine. Check the throttle plate and see if it is hung up or possibly the throttle cable is frayed and holding the throttle open. It is not the injectors, they operate on inputs from the PCM.

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you need to set throttle position sensor .check make sure you dont have a vacuum hose off somewheres to .

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1 Answer

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