Question about 1998 Chevrolet K1500

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98 chevy 1500 loses power

98 chevy 1500 pu loses power when it warms up, new coils new ignition module new plugs new wires no change, runs great when you first start it, when it warms up, idles ,no power,bogs down at 2000 rpms

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  • bigsuede Oct 25, 2008

    exhaust seems to be open no restriction

  • tmg812 Dec 22, 2008

    Same problem, removed converters and still bogs down at 2000. MAF???

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Initially it sounds like a coolant temp sensor problem to me. You could also check EGR function. If it's sticking open then you might have that problem. The (TPS) throttle position sensor may be bad, if you are experiencing an off idle "bog". Hope this helps.

Posted on Nov 02, 2008

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This sounds like the exhaust is the prob. My guess is the convertor! Frankster016

Posted on Oct 25, 2008

  • frankster016 Oct 26, 2008

    You will need to check this with the engine warmed up. Some shops have a pressure testing unit. A small hole is drilled an tapped at the front of the convertor, after the test a pipe plug seals it back. Have seen where the exhaust pipe got a 'bubble' inside it! Frankster016

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SOURCE: 1998 chvy 1500 loses power

check the intake gaskets. in the middle front and middle rear. If they are oily, it more than likely sucked part of the gasket in. When it warms up the leak gets bigger. The easy way to check is to get some carb cleaner and spray all around the intake while idling and warm. DO NOT SPRAY ANY EXHAUST PARTS , carb cleaner is combustible. The truck should stumble or even shut off when spraying with the carb cleaner if there is a leak.

Posted on May 03, 2009

alicantecoli
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SOURCE: 98 chevy 1500 loses power

sounds like an ECU fault.one of the chips is breaking down when the units warms up

Posted on Nov 04, 2008

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1998 chvy 1500 loses power


check the intake gaskets. in the middle front and middle rear. If they are oily, it more than likely sucked part of the gasket in. When it warms up the leak gets bigger. The easy way to check is to get some carb cleaner and spray all around the intake while idling and warm. DO NOT SPRAY ANY EXHAUST PARTS , carb cleaner is combustible. The truck should stumble or even shut off when spraying with the carb cleaner if there is a leak.

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98 chevy 1500 loses power


sounds like an ECU fault.one of the chips is breaking down when the units warms up

Oct 26, 2008 | 1998 Chevrolet K1500

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