1992 Chevy S-10 intake leak

1992 CHEVROLET S-10
186,294 MILES • 6 CYL • 2WD • AUTOMATIC
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SHANEOMATTIC
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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[img:13ec99a164]http://www.2carpros.com/forum/automotive_pictures/579595_100_3218_2.jpg[/img:13ec99a164]
Oct 4, 2010 at 1:22 AM
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WRENCHTECH
  • ✓ASE Certified Mechanic
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  • ASE Certified Mechanic
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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Oct 4, 2010 at 5:22 AM
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