4.3 vortec

1997 GMC SONOMA
180,000 MILES • 6 CYL • 2WD • MANUAL
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CHRISTESTER
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  • 1 POST
THE TRUCK RUNS BUT HAS NO ACCELERATION I HAVE REPLACED THE MAP SENSOR AN THE CAMSHAFT POSITION SENSOR AN ALL THE INTAKE MANIFOLD GASKETS PULLED THE FRONT TIMING COVER OFF AN CHECKED THE TIMING CHAIN AN GEARS THERE ALL GOOD NEW SPARK PLUGS AN WIRES AN CAP AN BUTTON WHEN U ACCELERATE IT GOES WOOM AN BOGGS DOWN THEN SLOWLY ACCELERATES???
Aug 1, 2011 at 3:54 PM
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JDL
  • ✓ASE Certified Mechanic
  • 16,098 POSTS
  • ASE Certified Mechanic
Use a gage and check fuel pressure.
Aug 1, 2011 at 4:04 PM
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JDL
  • ✓ASE Certified Mechanic
  • 16,098 POSTS
  • ASE Certified Mechanic
Just to add, with the spider fuel system, 60--66psi key on engine off. Also, take a look at the throttle position sensor.
Aug 1, 2011 at 4:11 PM
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