Question about 1989 Chevrolet C1500

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Will not idle

New plugs, filters fuel and air , throttle sensor, fuel pump , will run at speed but braking to stop will die

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Hi lanzmick,

A few questions:

  • Is it difficult to start too? Need to keep your foot on the pedal?
  • Carb or FI?
  • Did this just start happening? Gradually? Correspond with some other event or part replacement?
  • I believe your vehicle has an option for OBDII diagnostics. If so, stop by an auto parts store and ask if they can do a code reading. Most will do it at no cost. This will hopefully give a definitive reason for the problems.
In the meantime, check for vacuum leaks. Inspect for loose or cracked hoses.
I know this can be difficult, but try keeping it running while listening for a sucking sound that isn't the intake.

If it's carb'ed, check the choke and its associated linkages.

Check the timing.

Get back to me with the results, we can pick up from there.

Posted on Aug 20, 2008


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