CarburetorsCarb discussion and questions. Upgrading your Third Gen's carburetor, swapping TBI to carburetor, or TPI to carburetor? Need LG4 or H.O. info? Post it here.
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Call me an idiot for this but... I am using the stock 3.1 mpfi fuel pump on my carb'd 357. I have the Summit/Holley http://www.summitracing.com/parts/SUM-G3131B/ regulator hooked up with the in-tank fuel pump coming in the right side, the fuel return connected at the bottom and the carb line hooked up on the right side, ( http://www.holley.com/data/Products/...199R7914-3.pdf page 3 figure 2A). I also have a AZ-Mr. Gasket fuel pressure gauge w/max psi of 15. When I turn the pump on by the rocker switch inside the car i am getting fuel leaking by the metal dual carb lines going to my holley 770 St. Avenger. I thought okay maybe I need to adjust the regulator, so, as per the instructions I backed off the pressure almost all the way, made sure ALL lines & fittings were snug. Still getting a fuel leak where the rubber line meets the metal carb feed line, and with the pump on I get NO fuel PSI reading. The gauage is new as is everything else. The carb is deff getting fuel as I can crack the throttle and see fuel spraying...WTF?!?! Please help this idiot, this is one of 2 things keeping me from firing up the engine for the first time and breaking in the cam
Re: Excessive fuel pressure with inline regulator??
You need a different regulator that is a return style, right now your fuel pump is pushing like 45-50 psi to the regulator, which cuts it down, but the excess fuel has nowhere to go.
Re: Excessive fuel pressure with inline regulator??
Okay so that regulator is getting "killed" by the factory V6 pump. So will this mallory http://www.malloryperformance.com/Pr...minselection=4 solve the problem? Is this the only one that'll work for what Im doing? I've looked them up on the major sites but am not sure if others, B&M, NX etc. will do the same job...
Last edited by Rob 97 Z28; 12-08-2009 at 10:54 AM.
Re: Excessive fuel pressure with inline regulator??
supposedly, the one i have http://www.summitracing.com/parts/SUM-G3131B/ Is a return, or atleast the instructions show an aoptional way to hook it up so that it is a bypass regulator. In the item description though it says "Style: non-return", which is what has left me confused bout the whole friggin thing....
Update:
Im an idiot. Called Holley, the guy confirmed for me that the regulator I have is intended for external aftermarket elec. fuel pumps. I assumed I could use it with my stock V6 elec. pump. He said that the regulator I would need would be the mallory 4309. Needless to say it was ordered after i got off the phone with Holley.
Last edited by Rob 97 Z28; 12-08-2009 at 02:46 PM.
