1995 Sierra 5.7 Help
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?
could be a bad catalitic converter.
Ignition timing, and/or vacuum advance on distributor
How long since your last major tune up? (Plugs, wires, fuel filter, air filter, ect.)
It's been quite awhile since the last tune up
I would probably start there if it was mine.
Looking for a Used Sierra 1500 in your area?
CarGurus has 61,544 nationwide Sierra 1500 listings starting at $1,295.
Search GMC Sierra 1500 Questions
GMC Sierra 1500 Experts