1989 GMC Truck running poorly

1989 GMC TRUCK
124,000 MILES • 7.4L • V8 • 4WD • AUTOMATIC
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BRANDONRU1
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  • 1 POST
While driving (especially after start up) the truck bogs and misfires and runs like crap. No power and is tough to keep speed and is impossible to haul a trailer. After a while it will smooth out and start running better but still does not have power to haul a trailer like it should.
Jun 12, 2015 at 10:32 AM
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HMAC300
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  • 48,601 POSTS
scan for codes and check fuel pressure with a gauge auto parts rent it if it has a tbi unit you may need adapters
Jun 12, 2015 at 12:10 PM