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Previous Thread Next Thread Print Thread Rate Thread Jeep won't idle smooth #861045 01/18/08 10:18 PM Joined: Nov 2007 Posts: 7 New Jersey 9 93jeepcher OP Need a Spot I have a 1993 Jeep Grand Cherokee V6 4.0, that idles rough. When i put it in gear the rough idle is felt even more. I recently had to put a new CPS in when it stopped running. Now it runs, but not smooth. People told me that a cps either works, or doesn't. I also did plugs, rotor, cap, wires, and fuel filter. There is no check engine light on either. I am out of ideas. Any advice would be greatly appreciated. Thank You Re: Jeep won't idle smooth [Re: 93jeepcher] #861046 01/19/08 12:04 AM Joined: Oct 2003 Posts: 7,768 Central Texas BigJim Web Wheeler What you have is an inline 6 cylinder...NOT a V-6. That said the idle is mostly controlled by the IAC (idle air control) This is at the throttle body. It is usual to clean both the IAC and the throttle body to improve the idle.. You MAY need another IAC if the idle doesn't improve. Do you have the stock air cleaner on that Jeep? The cold air kits usually cause idle problems as they allow too much dirt to enter the engine. Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" /> professional bovine relocation specialist Re: Jeep won't idle smooth [Re: BigJim] #861047 01/20/08 02:25 AM Joined: Jan 2007 Posts: 353 playinmud Mudrunner ever have the injectors cleaned? that smoothed up my rough idle, along with a cleaning of my throttle body and IAC WHEN THE ROAD ENDS, THE FUN BEGINS 97 sahara, 4in skyjacker lift, 33in tires, borla header & catback, 10in subs Re: Jeep won't idle smooth [Re: 93jeepcher] #861048 01/25/08 09:04 AM Joined: Dec 2005 Posts: 66 R rvdjr Getting the Wheeling Fever check for vacuum leaks, or better yet replace all vacuum lines. the factory ones are probably getting a little old. an easy check it to plug all vacuum ports well and then test it. if it was a vacuum leak this will prove it. Moderated by  4x4Wire  Hop To Mitsubishi Forums ------  Mitsubishi 4x4 and SUV Tech  Mitsubishi Diesels  Mitsubishi ArchiveToyota Forums ------  Early Toyota Trucks  Toyota 4Runner, FJ Cruiser &...  T100 & Tundra Forum  Tacoma Forum  Toyota Tech ArchiveJeep Forums ------  Jeep Talk  Jeep TechIsuzu Forums ------  Isuzu 4x4 & SUV Talk  Isuzu 4x4 & SUV Tech  Isuzu DieselsKia Forums ------  Kia Talk  Kia Sportage & Sorento TechOff Topic Chat ------  4x4 Gallery  Off-Topic Chat  Recreational Access & Land ...  Politics4xForums ------  Outdoor Gear  General 4x4 Discussion  Tools and Fabrication  General Communications  Amateur Radio  GPS and MapsParts Bin ------  Private Party - Garage Sale  Private Party - Items wanted  Vendors, Hot Deals, Group Buys4x4Wire Back Yard ------  Suzuki Forum  AZ Crawler Crew  Cal-Nev Crew  General Ford 4x4 & SUV Forum  General Dodge 4x4 & SUV Forum  General Chevy 4x4 & SUV ForumFeedback & Testing ------  Problems, Questions, Suggestions4x4Wire Staff ------  Forum Moderators  Problem Threads Print Thread Switch to Threaded Mode 5 Excellent 4 Good 3 Average 2 Bad 1 Terrible View Profile Private Message Follow User Forum Posts View Profile Private Message Follow User Forum Posts View Profile Private Message Follow User Forum Posts View Profile Private Message Follow User Forum Posts

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