Fuel Pump Problems!
Tuned
Joined: Sep 2005
Posts: 331
Likes: 1
From: Charlton, NY
My vehicle has recently developed a problem; often during cold start it will fire but die prior to a full start. I have to reengage the starter to get it it to fire and run. Maybe my FPDM is failing. How do I check? I have torque pro so I can read fuel rail relative pressure. What should it read when the key is on but prior to cranking? TIA
Hotshot
Joined: Jul 2005
Posts: 11,931
Likes: 180
dont jump in on a 6 year old post... Start your own.
The fuel rail should have 30 psi or so after it sets.. If you have a bad check valve, the fuel will run back into the tank and rail will have no pressure.. Then when you crank, you get a momentary start, then die.. Check the rail pressure to verify.. Turn the key ON ( 3 seconds)- OFF- ON ( 3 seconds) a couple times, but do not START.. Pump should build up pressure in the rail and start easier.. See how long it takes to bleed off.
The fuel rail should have 30 psi or so after it sets.. If you have a bad check valve, the fuel will run back into the tank and rail will have no pressure.. Then when you crank, you get a momentary start, then die.. Check the rail pressure to verify.. Turn the key ON ( 3 seconds)- OFF- ON ( 3 seconds) a couple times, but do not START.. Pump should build up pressure in the rail and start easier.. See how long it takes to bleed off.
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