I am still working on the fuel system in my 69 RS. I currently have -6 braided stainless hose running frome the tank to the carb w/one way valve(to keep fuel from draining into tank after extended storage times--which was the 1st problem), then Summit electric fuel pump(burned the first pump up with the 1st problem--2nd problem), and then a fuel pressure regulator(am on the third regulator and this is the current problem).

The problem is, the fuel pressure is fine when the pump is first on but the longer it runs the pressure just gradually increases. When idling, the pressure gauge will peg out after so long, but as long as it is moving it will level out.

My question is, if I unplug the other port on the regulator and run a line back to the rear of the car, and put a T in the line between the one-way valve and pump, will this cure my problem? I know they recommend using a return line to prolong the life of the pump but will it help me with my problem?

Please help with this, I have only been able to put about 20 miles on my crate motor in 6 months and want to get it broke in for some track time this summer.

Thanks



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69 RS Camaro (383,350t,12-bolt w/3.73s)
79 WS6 Trans Am (406SBC,factory 4-spd,3.23 posi)
87 GTA Pace Car Clone (350TPI,700r4,140k miles)
97 Bonneville SSE 40th Anniv. (3800 V-6, Power Everything, The little woman's car)

Return summits pump and regulator and get a good mechanical one like an edelbrock. Call summit and tell em your problem. It's their unit and I'm sure they will take care of you. You should have done this at first when it didn't work and you still had a guarentee. But either way I've had absolutly no problem with summit yet (knock on wood).

I am currently using a Holley regulator and have used 2 Summit regulators and all have done the same thing. So I don't think it's the parts. I can't use a mechanical fuel pump, I changed motor mounts and it lowered the engine about 1/2" and it is less than 1/8" from the crossmember. That is a little too close for me. That is the reason I went with the electric setup, I didn't necessarily want to but it was the option I decided to go with.

Thanks

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69 RS Camaro (383,350t,12-bolt w/3.73s)
79 WS6 Trans Am (406SBC,factory 4-spd,3.23 posi)
87 GTA Pace Car Clone (350TPI,700r4,140k miles)
97 Bonneville SSE 40th Anniv. (3800 V-6, Power Everything, The little woman's car)

It sounds like you have a pump that does not have an internal bypass.In that case I would run a return line but you'll need the proper regulator.

Where is your electric pump located? It sounds from your post like it's up front - if so, that's part of your problem - electric pumps are designed to push, not pull.

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JohnZ
'69 Z28 Fathom Green

The pump is in the rear axle hump and the regulator is in the engine bay.