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    medic5983's Avatar
    medic5983 Posts: 5, Reputation: 2
    New Member
    		  
    #1

    Dec 4, 2011, 08:43 AM
    Jeep problems
    I have a 1991 jeep wrangler YJ with the jeep 2.5L motor. I just rebuilt it and now when you start it it runs rough idles very rough at first then dies. When driving as you first take off from a stop it isis very rough until your rpm gets above 2000 it is very rough once it tachs above 2000 it runs great. I have had checked and rechecked and taken it a mechanic who has also checked and rechecked everything. So far it has new plugs wires, distributor
    odinn7's Avatar
    odinn7 Posts: 7,691, Reputation: 1547
    Entomology Expert
    		  
    #2

    Dec 4, 2011, 09:09 AM
    Well, without checking it myself, I can only throw a guess out there at you. It sounds to me like there is a vacuum leak there somewhere. Usually the symptoms you describe are caused by vac leaks. It could be a hose, it could be intake... check everything.
    medic5983's Avatar
    medic5983 Posts: 5, Reputation: 2
    New Member
    		  
    #3

    Dec 4, 2011, 06:27 PM
    Replaced all the van lines and have already checked for leaks by hand and by gauge there isn't one. Intake, timing, injectors are all good, I have 142.6 lbs pressure exactly in all 4 cyl. I've replaced all the sensors. All hoses and lines have been replaced
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
    Uber Member
    		  
    #4

    Dec 4, 2011, 07:46 PM
    I would replace the Ignition Control Module (ICM). Super easy and cheap on that vehicle. Only use the called for Champion spark plugs (no substitutes).
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