MY 91 SILVERADO 350TBI MISS UNDER LOAD?

  • Tiny
  • Baines48
  • 1991 Chevrolet Silverado
  • 81,000 miles

Misses under load (truck empty)

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Wednesday, December 7th, 2011 AT 7:37 PM

5 Replies

  • Tiny
  • saturntech9
  • Expert
  • 29,419 posts

Miss under load first thing I would suspect is plugs and wires.

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Wednesday, December 7th, 2011 AT 8:14 PM
  • Tiny
  • Baines48
  • Member

Im thinking camshaft. Plugs, wires, rotor have been replaced and distributor cap

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Wednesday, December 7th, 2011 AT 9:32 PM
  • Tiny
  • saturntech9
  • Expert
  • 29,419 posts

If it only misses under excelleration I wouldnt suspect a cam shaft that should effect at all different rpms. Usually when it happens under excelleration its a igniton issue. Is it worse with the ac on?Also how about your coil?

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Wednesday, December 7th, 2011 AT 9:48 PM
  • Tiny
  • Baines48
  • Member

The truck backfires through throttle body (TBI) when under load. Don't know what to check next? Cam etc.

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Friday, December 9th, 2011 AT 8:47 PM
  • Tiny
  • saturntech9
  • Expert
  • 29,419 posts

Have you checked the ignition timing yet?

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Friday, December 9th, 2011 AT 9:35 PM

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