Ilding Problems

[tbs1015]

Dear Jeep enthusiasts,
I own a 97' Wrangler 6 cylinder, 5spd. My problem is this. When I go to crank the jeep in the morning it cranks fine, but i usually let it warm up before I start driving. In the warming up process or idling process, the jeep starts to idle really rough. It will sputter while idling like it is fixing to turn off and then every now and then will rev itself up and idle normal. When I don't warm it up and just drive it, it will do the same thing down the road. It will act as if it is fixing to die until I rev it up or shift gears. Its not the temperature sensor because I replaced that. Its not the alternator because I tested it is fine. I have tried cleaning the throttle body plate, fuel injector, and nothing has helped it. Any help would be very nice thank you

 

[TerryMason]

Is the check engine light on?

 

[Bounty__Hunter]

I recommend removing the throttle body (4 bolts at the base) and removing all sensors from the throttle body. Give the throttle body a good bench cleaning with carb cleaner and an old tooth brush. Pay special attention to the IAC housing attached to the side of the throttle body with 4 tamper-proof torx bolts. This IAC plunger is what controls the idle speed.

Could also be the TPS (throttle position sensor) attached to the back side of the throttle body.

 

[tbs1015]

No the check engine light is not on

 

[JPNinPA]

Re: Idling Problems

Dear Jeep enthusiasts,
I own a 97' Wrangler 6 cylinder, 5spd. My problem is this. When I go to crank the jeep in the morning it cranks fine, but i usually let it warm up before I start driving. In the warming up process or idling process, the jeep starts to idle really rough. It will sputter while idling like it is fixing to turn off and then every now and then will rev itself up and idle normal. When I don't warm it up and just drive it, it will do the same thing down the road. It will act as if it is fixing to die until I rev it up or shift gears. Its not the temperature sensor because I replaced that. Its not the alternator because I tested it is fine. I have tried cleaning the throttle body plate, fuel injector, and nothing has helped it. Any help would be very nice thank you

Besides cleaning the IAC and TB as mentioned you could have a failing O2 sensor. You will not get a cell for this. It will cause rough idle until O2 temp is reached. Usually the down stream O2.