1995 Sierra 5.7 Help
20

Asked by Skettie Nov 23, 2013 at 06:46 PM about the GMC Sierra 1500

Question type: Maintenance & Repair

Engine starts fine and idles fine, when you give it gas to speed up it starts losing power. If
you bear down on it, it backfires and really loses power.  When you let off of it, it picks up
and runs ok again.  It seems to be worse when it is warm.  any thoughts?

5 Answers

DavidH25 answered 10 years ago

Ignition timing, and/or vacuum advance on distributor

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dandyoun answered 10 years ago

How long since your last major tune up? (Plugs, wires, fuel filter, air filter, ect.)

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Your Answer:

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