Question about 1989 Jeep Wrangler

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Jeep wont hardley idle ..when speed gets up to about 30mi. it runs great. about six months we replaced distributor, s.p.wires, s.plugs, fuel filter, fuel pump, air filter, some vacuum hoses. been fine until about 3 wks. ago it started have trouble idling. thanks, quidox

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  • Anonymous Mar 19, 2014

    HAS 258 INLINE 6 MOTOR. IDLES GOOD BUT WHILE DRIVING CUTS OUT AS IF WERE RUNNING OUT OF FUEL. I HAVE REPLACED PLUGS AND WIRES. NEW FUEL FILTER AND FUEL PUMP. NEW CARBURETOR AS WELL. FRESH FUEL. SEEMS WORSE WHEN ENGINE IS WARMED UP. CARBURETOR IS PROBABLY OUT OF ADJUSTMENT FROM FORMER OWNER.
    I WAS THINKING POSSIBLY THE CAT CONVERTER CLOG.
    IT HAS NO AIR FILTER CANISTER AND THERE IS A FEW VACUUM HOSE NOT PLUG TO ANYTHING. I HAVE AFTER MARKET BOOK FOR IT. BUT NOT VERY DETAILED DIAGRAMS FOR HOSES. WONDERING WHY IT SOUNDS GREAT AT IDLE AND AT LOW RPMS WHILE PARKED. BUT DRIVING IS MAJOR HESITATION AND CUTTING OUT. ON INCLINE AS WELL. AND ITS ACTUALLY 1982. PLEASE IF ANY ONE COULD HELP.
    THANKS SO MUCH!

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Sounds like a possibility of a vacuum leak. Inspect the vacuum tubing for damage or wear or just not being connected. One mechanic's trick is to spray carburetor cleaner on the vacuum lines with the engine running. Use safety goggles when trying this. If there is a vacuum leak - when the carb cleaner hits it the engine will speed up.

Posted on Dec 12, 2009

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