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1988 Chevy Silverado Fuel System (?)

Tiny
219JASPER
  • MEMBER
  • 1988 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 225,000 MILES
Truck will not accelerate cold. As engine warms up, will gradually be able to give it more gas until finally can run at highway speeds. Even once warmed up, do not have full power for a hard acceleration, as if running out of gas or on less than all cylinders. Have changed: fuel pump, fuel filter, ECM, catalytic converter, exhaust, engine temp. Coolant sensor. Have checked vaccuum lines, plugs, wires, cap and rotor. Do occasionally get a "lean" code. Completely stumped on this one.
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Tuesday, December 30th, 2008 AT 6:53 AM

3 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Have you checked O2 operation? If faulty will run lean causing cold run problem
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Tuesday, December 30th, 2008 AT 8:36 AM
Tiny
219JASPER
  • MEMBER
  • 3 POSTS
O2 sensor or relatively new, doesn't necessarily mean it's not faulty. Will replace and try again. Thanks.
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Tuesday, December 30th, 2008 AT 10:37 AM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Try this get a timming light shoot it at the TBI see inj spray pattern if not even 360 deg that will cause problem
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Tuesday, December 30th, 2008 AT 1:30 PM

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