i have 1998 grand cherokee jeep larado, it idles high so i put new water pump,valve cover gasket and fuel pump, and it still goes dead and has high idle, the last time i got it cranked went a block and it went dead and brakes wouldnt catch had to tow it again,,, help
Have it scanned, running like that it must have an engine light on
an engine with a vacuum leak that idle high suggest a bad map sensor. Scan the vehicle for map sensor codes. If codes shows up, replace the map sensor.
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