1993 Jeep Laredo

1993 JEEP GRAND CHEROKEE LAREDO
100,000 MILES • 6 CYL • AWD • AUTOMATIC
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TECHNOHIGHLORD
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when i give it gas it studders. when i get going the engine studders when i give it gas but smooths out when you let off. i notice that the exh. has a put put sound i gave it a tune up but it didnt help
Jan 24, 2009 at 6:09 AM
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MASTERTECHTIM
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sounds like a engine misfire. did you replace cap, rotor and wires wiuth new spark plugs? if so thn next you need to do a compression test to make sure all cylnders have compression
Jan 24, 2009 at 6:40 AM
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TECHNOHIGHLORD
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yes replaced cap wires plugs and rotor compression is good
Jan 24, 2009 at 4:46 PM
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MASTERTECHTIM
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the putt putt sound makes me think its a misfire but you said compression is good in all cylinders? next step would be try doing a slight brake stand and short out each cylinder by using a short piece of rubber vacuum hose on the dist cap between plug wire and cap and i use a test light and lightly touch the rubber hose to short out each cylinder and find the cylinder that does not change when shorting it out and then you knbow what cylinder is misfing then you need to check for maybe a broken valve spring, or rocker arm loose or fuel injector spray
Jan 24, 2009 at 4:56 PM