1991 Chevy Camaro Fuel Pump....or connections.

1991 CHEVROLET CAMARO
89,000 MILES • 6 CYL • 2WD • AUTOMATIC
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RAYBO777
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  • 3 POSTS
Fuel pressure at rail is 42...while at idle. Push on gas easy and no pressure increase.....Push on gas hard and pressure falls to 20....car will lose power and shutter...Replaced fuel pump 5 months ago....pressure would rise when you push on gas pedal...now it falls...If you push hard goes to 20-10lbs and car shutters....could it be the filter? the pump, or bad connector to harness losing volts...Please help.
Nov 20, 2009 at 5:22 PM
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ERNEST CLARK
  • ✓ASE Certified Mechanic
  • 1,730 POSTS
  • ASE Certified Mechanic
Your pressure decrease could also be the cause of a failing fuel pressure regulator, or a sticking injector.

If the fuel pressure regulator is faulty, it won't allow fuel pressure to build up correctly. (Bleeding it back to the tank)

If an injector is sticking, it'll spray too much fuel and decrease pressure in the rail.

The best bet is the regulator.
Jan 8, 2010 at 9:33 PM
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