Question about 1995 Jeep Grand Cherokee
Your idle speed is controlled by the computer which reacts to signals from the engine sensors . You need to test the sensors with a digital multi-meter to determine which one is not giving proper readings.
both haynes and chilton manuals have good test procedures but I prefer chilton for better wiring diagrams.
Aside from sensors, I would clean the throttle body using carb cleaner inside, around the throttle plate to make sure it is sealing properly when closed. The device next to the tps should be your idle control solenoid. that too needs cleaning. If you remove it, don't turn the plunger on the end and do not loose the o ring. Good testing is necessary to determine what is wrong. get the manual and do it. No good shop could possibly tell you what's wrong without doing the exact same thing. If you have any stored fault codes, have any of the larger parts stores check them for you. Most do this free and it can be helpful to give you a starting point for tests.
Not necessary to rate this answer because aside from advice, I can't tell you exactly what is wrong.
Posted on May 13, 2010
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Posted on Jan 02, 2017
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