1990 Chevy Truck

1990 CHEVROLET TRUCK
140,000 MILES • 6 CYL • 2WD • AUTOMATIC
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CHEVYMAN549
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  • 1 POST
I just bought 1990 chevy truck with v6.
It will start with a very high idle, then idles down and cuts off. I have replaced throttle body gasket, control valve on the throttle body. Still does same.
Any ideas??
Feb 25, 2010 at 7:10 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Check and test the fuel pressure, clean out the idle air control valve and test the throttle position and manifold absolute pressure sensor-to include the EGR valve-
Feb 26, 2010 at 3:26 AM
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