Question about 1996 GMC Sierra
Does fine under acceleration or deceleration but at even keel she backfires. changed plugs rotor cap wires cleaned out fuel system?
Check for leaking injectors and vacuum leaks as there is fuel getting into the exhaust system and igniting. check ignition timing as it may be retarded too far.
Posted on Mar 23, 2014
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Posted on Jan 02, 2017
SOURCE: no power when hit the gas
The fuel presure should be at least 60- 66 psi key on engine off, and then drop some when started, if it doesn't go any higher than 50 psi that would explain your backfire concern. If it is low then the fuel pump is weak. I have also seen soot on the little wires inside the Mass Airflow Sensor cause a concern like this.
Posted on Nov 18, 2008
SOURCE: 95 GMC hesitation
By "OVERDRIVE '' . are you meaning the TCC ( torque converter clutch ) is engaged ? and if so, when you increase RPM's to accelerate, it should disengage otherwise causing a noticeable hesitation. Hope this helps
Posted on May 07, 2009
By module do you mean computer? There's nothing wrong with it. Yea, replace all ignition components with new ones. New cap, rotor, wires and spark plugs.
Posted on May 18, 2009
that is a tricky one you have almost replaced everything. that is fuel injected if you dont have the right fuel pressure when you step on the gas it will fall on its face you need to take a fuel pressure reading and also it could be as simple as the fuel filter which is often over looked it could be cloged restricting the flow. also check the MAP sensor
Posted on Sep 02, 2009
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