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Old 12-17-2009, 05:46 PM
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Default Fuel pressure regulator?

OK here's my dilema, fuel pump crapped out and installed a new one. Had good fuel pressure with new pump 43psi for about 2 minutes. Took the car off jacks and went to start back up agian. No start, checked fuel pressure, read about 10 psi. Pump is getting power, its running. Installed new relay, the FSM has nothing about troubleshooting, now I'm lost and frustrated.

The fuel pressure regulator is located on the return side of the fuel lines, would this low reading indicate a bad regulator? It makes sense to suspect this but i'm not 100% sure before I throw more money at it.

I could not get a definate look inside the elbow for fuel because in the proces of connecting and disconnecting the fuel pressure gauge I've made a mess. ANy input would be greatly appreciated.
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Old 12-17-2009, 06:17 PM
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Did you change the in-tank wiring for the FP when you installed the new one? The connectors have a bad habit of melting and making poor contact.
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Old 12-17-2009, 06:25 PM
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The original wiring looked fine. I purchased an Airtex wiring harness but the wiring on it was wrong and I broke it while trying to re arrange it.
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2004 Suburban...What was I thinking...
1996 Fleetwood Brougham, Rear Disks, It handles now, tastefully modified
1984 Coupe DeVille, Budget Lowering Springs, 9C1 3.23 Posi/Disk Rear end, 18 and 20" Coys, awaiting 383/700R4 transplant.
1980 Malibu Coupe, Grandma fresh 100K original owner New Mexico rust free
1978 Pontiac Catalina Safari, old guy fresh 83K original owner New Mexico rust free
1996 Caprice Wagon SOLD

Happiness is driving a Wagon.
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Old 12-17-2009, 10:17 PM
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trust me do what gold master said. i use to yank on the fuel harness under the back of the car and the fuel pressure would climb back up. after droppin the tank the harness looks fine but wasnt.

my fuel pump work i can hear it and the pressure would be around 10psi.

go to ur car and yank the wires a lil give it a few bang and have ur buddy check the fuel pressure while priming the car. if the pressure climb replace the harness.
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Old 12-17-2009, 10:48 PM
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Quote:
Originally Posted by defdaboss View Post
trust me do what gold master said. i use to yank on the fuel harness under the back of the car and the fuel pressure would climb back up. after droppin the tank the harness looks fine but wasnt.

my fuel pump work i can hear it and the pressure would be around 10psi.

go to ur car and yank the wires a lil give it a few bang and have ur buddy check the fuel pressure while priming the car. if the pressure climb replace the harness.
Well. I guess I'll be dropping the tank agian and buying another harness.

I wish I had some friends to help me, it sucked getting the tanks back in by myself.
__________________
2004 Suburban...What was I thinking...
1996 Fleetwood Brougham, Rear Disks, It handles now, tastefully modified
1984 Coupe DeVille, Budget Lowering Springs, 9C1 3.23 Posi/Disk Rear end, 18 and 20" Coys, awaiting 383/700R4 transplant.
1980 Malibu Coupe, Grandma fresh 100K original owner New Mexico rust free
1978 Pontiac Catalina Safari, old guy fresh 83K original owner New Mexico rust free
1996 Caprice Wagon SOLD

Happiness is driving a Wagon.
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Old 12-17-2009, 11:21 PM
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Quote:
Originally Posted by RollinSlow84 View Post
Well. I guess I'll be dropping the tank agian and buying another harness.

I wish I had some friends to help me, it sucked getting the tanks back in by myself.
i know man. i done it 4 times already. twice with my girlfriend and she wasnt very helpful since she didnt know what tools i was requesting while i was down there or when i ask for a small hand working the jack for me.in case you dont do it the way i do it, here's my step by step making the job a bit easier (one man job).

put a jack under the tank (center). and loosen the bolt. get out from under there and bring the tank down slowly with the jack. i would unbolt everything out and pour all the fuel into a clean empty trash bin so the tank would be so much lighter and easier to put back on. getting the bracket and the bolt thru could be troublesome but i place a jack right under the bracket near the bolt and lift it up. thus press the bracket a bit more higher so i can slide the bolt thru. once that's done i pour the gas back in from the license plate.
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  #7  
Old 12-19-2009, 03:00 PM
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Problem solved, new wiring harness did it.

Check out this thread http://www.impalassforum.com/vBullet...d.php?t=235178
__________________
2004 Suburban...What was I thinking...
1996 Fleetwood Brougham, Rear Disks, It handles now, tastefully modified
1984 Coupe DeVille, Budget Lowering Springs, 9C1 3.23 Posi/Disk Rear end, 18 and 20" Coys, awaiting 383/700R4 transplant.
1980 Malibu Coupe, Grandma fresh 100K original owner New Mexico rust free
1978 Pontiac Catalina Safari, old guy fresh 83K original owner New Mexico rust free
1996 Caprice Wagon SOLD

Happiness is driving a Wagon.

Last edited by RollinSlow84; 12-19-2009 at 06:17 PM.
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