1992 Chevrolet S-10



October, 4, 2010 AT 1:22 AM

Engine Performance problem
1992 Chevy S-10 6 cyl Two Wheel Drive Automatic 186294 miles

my 92 s10 4.3 vin z has a proublem, if you tap the gas it will rev then rev to about 2000 rpm then come down slowly it had a m.a.p sensor code a while back so i tightend the intake manifold its the same, i sprayed brake cleaner around the intake no rpm change except at the egr valuve so i replaced the gasket, could it be the intake manifold gasket? Thank you for your time

1 Answer



October, 4, 2010 AT 5:22 AM

It could be vacuum but it sounds like that has been checked pretty thoroughly. You could try cleaning the throttle body and back of the throttle plate with a brush and carb cleaner but judging by the mileage you have, the throttle body may be just to worn out to seal all the aiir out.

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