stumbles on acceleration


Old 01-19-08, 08:11 AM
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stumbles on acceleration

88 chevy 3/4 ton 5.7 , friend bought truck it needed flywheel (never heard it run,sat for 5 months) we installed new flywheel started it up ran ok now it stumbles on acceleration we installed new cap/rotor/fuel filter, checked plugs ok replaced coil wire arching sprayed rest of wires with water ok no engine light on checked for vaccuum leaks none found
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Old 01-19-08, 08:24 AM
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I would start by replacing the all the plug wires and put in fresh fuel if you haven't already. Five months sitting could have given you bad fuel.
Old 01-19-08, 08:46 AM
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Stumbling on acceleration with carb engines always indicated an accelerator pump prob back in the day.

Yours has TBI, right? Does throttle body fuel injection use an accelerator pump?

I love the reliability of most new cars, but GAWD I hate working on them.
Old 01-20-08, 07:37 AM
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When my '93 Silverado stumbled badly on accelleration, I first thought of fuel pump, fuel filter, etc. Changing the plugs and wires solved it before I looked any further. Running like a top ever since.

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