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1988 Chevy Camaro

Tiny
JMSENOIA
  • MEMBER
  • 1988 CHEVROLET CAMARO
Engine Performance problem
1988 Chevy Camaro V8 Two Wheel Drive Automatic

i was in touch a few days ago. Car will run awhile and then shut down. You said to start with fuel pressure check. Fuel pressure is at 13 psi. Car is cranking right now but I suspect it will do the same thing as I really haven't done anything to it except to check the fuel pressure. When I shut the car off the fuel pressure drops to zero. Shouldn't it remain constant? Help!
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Thursday, June 18th, 2009 AT 7:56 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
When the pump is turned off or stops running, the system should hold residual pressure for several minutes (look up the specs to see how much pressure drop is allowed over a given period of time). If pressure drops quickly, the vehicle may have a leaky fuel line, a leaky fuel pump check valve, a leaky fuel pressure regulator or one or more leaky fuel injectors. Low residual fuel pressure can cause hard starting and vapor lock during hot weather.
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Thursday, June 18th, 2009 AT 8:02 PM

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