Question about Jeep Grand Cherokee
How did you check the IAC? You have a whole bunch of maybes here. A failing fuel pump or crank sensor can do that, as can a loose connection just about anywhere.(including grounds) Your ignition switch can also give you a similar problem. Fuel pump won't turn the check engine light on. Sometimes the cps wont either 'till it gets worse. The radio works off a different circuit so that's likely why it remained on. If immediately after it stalls and you turn the key on you don't hear the fuel pump, that's a good indication that it may be ready to be replaced. But, make sure the relay is good (both pump and asd relay). As for testing other sensors, you will need to get yourself a chilton or haynes manual and a digital multi meter. There are individual tests you can do for each sensor. It won't hurt to unplug and then plug back in each sensor. If a contact is bad, often that will re-establish contact.
Harness "wiggle test" is a good idea too.
Don't worry about the ignition switch 'till you have tested all else. They don't go bad very often.
Posted on Apr 05, 2011
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Posted on Jan 02, 2017
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