1995 Sierra 5.7 Help

20

Asked by 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

10

could be a bad catalitic converter.

Ignition timing, and/or vacuum advance on distributor

2 people found this helpful.
123,945

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

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20

It's been quite awhile since the last tune up

2 people found this helpful.
123,945

I would probably start there if it was mine.

2 people found this helpful.

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