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fuel pressure
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85_trans_am
My first time was in a Chevy
| Posts: 240
| Joined: 05/09
Posted: 06/21/09
04:54 PM
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I have this fuel problem that I just can't figure out and need some help.
I have a chevy 383 motor and on top is a 750 demon carb. Feeding it is a Mallory Comp Pump Series 140 pump with a fram canister filter behind it, -6 braided line and a matching mallory regulator. The problem that I'm having is a fuel pressure loss. When everything is cool the presure is at 6psi after I take it for a drive the pressure drops to 2.5 to 3 psi and it feels like there is bubbles flowing through the lines.
I have already did the mod on the pump and did away with the bypass in the pump now that its on a regulator with a bypass.
getting fed up with chaceing this fuel problem any help will be nice. Thanks
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waynep712
I have an SS396 tatoo
| Posts: 358
| Joined: 12/07
Posted: 06/21/09
10:14 PM
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where are you pulling the fuel from....
through the stock pickup that has an electric fuel pump on it??? with a strainer on the end of that....
what happens when you free flow the electric fuel pump???? does it put out a lot of flow????
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panther66613
I love my Chevy Chevette!
| Posts: 3
| Joined: 06/09
Posted: 06/22/09
01:53 AM
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im with you stroker, do i need a fuel cell and fuel injection just to feed the carb or what. im getting mad too, because my last 2 mustang gts were injected and never gave me any trouble...and dudes with vortec motors never break down and roast the tires...what about us, huh
evil is live
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panther66613
I love my Chevy Chevette!
| Posts: 3
| Joined: 06/09
Posted: 06/22/09
01:55 AM
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how do i shake the chevette line ...im a former chevelle owner and i resent that
evil is live
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85_trans_am
My first time was in a Chevy
| Posts: 240
| Joined: 05/09
Posted: 06/22/09
12:17 PM
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The fuel tank was moded to work just like a fuel cell. Has no pickup just a sump, a return, a vent, and a float. The tank is baffled as well.
When it free flows before I drive it its fine. After driving for a while and the pressure drops there appears to be bubbles on the pressure side.
some help would be cool.
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