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Your jeep will turn over when started but won't idle what is causing this?
Wiki User
∙ 12y ago
Possible vaccum leak/lean condition. If it is a older model check base of carb for vaccum leaks also check all hoses i.e. pcv, egr, brake vaccum booster. If any of these areas leak vaccum, the engine will run very lean and die. If your vehicle is a newer model, check all the above plus the idle air control valve/ motor. When you check for a vaccum leak, look for the obvious; cracked hose, hose pulled off, etc. After you checked this, have a assistant keep engine running while you take a can of WD40 and spray along the base of the air intake/carb system and spray around the egr valve( which could be sticking open). When you find a vaccum leak the engine will temorarily smooth out until the fluid has been consumed. Remember, if the engine will run at higher RPMS, but wont idle it is most likely a loss of vaccum that is causing the problem. Good luck
AnswerIt could also be the throttle positioning sensor (TPS), I have found it to be more common than not. try this first many times over lookedcheck your battery voltage a low battery can be the problem it can start but it draws the voltage so low cranking it zaps the computer memory and that includes idle easy test hook up jumper cables or booster box and see if it starts and runs goodWiki User
∙ 12y ago
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