cant figure it out

CHEVROLET SILVERADO
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DADDYOFZAKK
  • MEMBER
  • 2 POSTS
my 1991 chevy 1500 runs real bad at an idle but only some time.ive done the whole tune up thing.and it did not help.and when i floor it,it will spit like it is not getting enough fuel but only sometimes..im pretty good at this i mean its only a 350 v8...thank you in advance for your time
Oct 24, 2007 at 2:20 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Lets find the idle air control valve/EGR and also check the closed and wide open throttle voltages of the throttle position sensor/ to include the MAP sensor.

Might also want to check the exhaust system for restriction.
Oct 24, 2007 at 7:32 PM
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