Mechanics

MY 91 350TBI MISS UNDER LOAD?

1991 Chevrolet Silverado • 81,000 miles

Misses under load (truck empty)
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Baines48
December 7, 2011.



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

Saturntech9
Dec 7, 2011.
Im thinking camshaft. Plugs, wires, rotor have been replaced and distributor cap

Tiny
Baines48
Dec 7, 2011.
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?

Saturntech9
Dec 7, 2011.
The truck backfires through throttle body (TBI) when under load. Don't know what to check next? Cam etc.

Tiny
Baines48
Dec 9, 2011.
Have you checked the ignition timing yet?

Saturntech9
Dec 9, 2011.