1989 Questions for all other cars loss of power,motorhome

1989 ALL OTHER MAKES ALL OTHER MODELS
36,000 MILES • V8 • 2WD • AUTOMATIC
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DUNESPIT
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1989 motorhome,dolphin,chevy 458,automatic transmission--i have an intermittant problem.Usually when the engine is warm.usually when I press the gas pedal to the floor for passing gear..sometimes it feels like gas flow has stopped.the engine feels as though it is going to die..it will surge a little,then no response from the gas pedal.I have changed:fuel filter,carb filter,new fuel pump,new spark plugs and wires,new distributer,new air filter.It did pass smog test today.just feels like an on/off switch to the fuel delivery system..any suggestions would be greatly appreciated
Mar 20, 2009 at 12:14 AM
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KHLOW2008
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Hi dunespit,

You mentioned carb so the problem could be due to a bad carb accelerating pump or power jet.

Have you tried servicing the carb ?
Mar 20, 2009 at 10:05 AM