MY 91 350TBI MISS UNDER LOAD?

1991 Chevrolet Silverado

Tiny

Baines48

December, 7, 2011 AT 7:37 PM

Misses under load (truck empty)

FOUND 2123 RELATED QUESTIONS

Mis Fire -

17 ANSWERS
11 IMAGES

5 Answers

Tiny

saturntech9

December, 7, 2011 AT 8:14 PM

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

Tiny

Baines48

December, 7, 2011 AT 9:32 PM

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

Tiny

saturntech9

December, 7, 2011 AT 9:48 PM

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?

Tiny

Baines48

December, 9, 2011 AT 8:47 PM

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

Tiny

saturntech9

December, 9, 2011 AT 9:35 PM

Have you checked the ignition timing yet?

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