1995 Chevy 2500 5.7 runs fine for 15 minutes highway speeds then starts backfiring and stalling until i let it sit for 15 minutes

Asked by Syed Bilal Dec 28, 2016 at 01:20 AM about the 1999 Chevrolet Silverado 2500HD LS Extended Cab LB 4WD

Question type: Maintenance & Repair

1995 Chevy 2500 5.7 runs fine for 15 minutes highway speeds then starts backfiring and does not go over 30 miles per hour then stalling, until i let it sit for 15 minutes then its ok again for 5 to 10 minutes of running at 70 miles per hour speeds and as it gets warmed up it then gets sluggish and back fires. Its not over heating. oil is good, plug wires and rotor are only 2 months old.
On the cold morning starts right up and drives perfect for 15 to 20 minutes at 70 MPH but then problem gets worst and it gets slowed down and stalls.

220,815

Rowefast answered 7 years ago

First thing that comes to mind is fuel pressure. The internal regulator in the TBI, the spring inside may be getting weak. Should try checking the fuel pressure at this time, fuel pressure should be 9 to 13 lbs. There are rebuild kits available. Also what fit the symptom could be the control module in the distributor under the rotor. Once warmed up they start to cut out.

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1995 Chevy 2500 5.7 runs fine for 15 minutes highway speeds then starts backfiring and stalling until i let it sit for 15 minutes

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1995 Chevy 2500 5.7 runs fine for 15 minutes highway speeds then starts backfiring and stalling until i let it sit for 15 minutes

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