My 1991 chevy blazer 4.3L is starting and idling fine, but while driving the...

  • Thread starter Thread starter skizzyp_skippynutz
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skizzyp_skippynutz

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...engine seems to rev up and down? I'll start it, and it runs and idles fine, but when I drive it, the engine seems to rev up and down. What could it be? I have put a new fuel filter, fuel pump, flywheel(cause it wouldn't start), spark plugs, oil, oil filter. The distributor was caked w/ corrosion, so I cleaned off the points. Should I buy a new cap? Would that make it do what its doing? Or is it the Throttle body injection needing rebuilt?
please no stupid answers like by a ford
 
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