Fuel Trouble (E-Pump/ Carb)

[o ARC ATHEISTxX]

The El Co has a 5-9 PSI Electric Fuel pump that runs straight to the holley 650CFM carb. i don't have a regulator on it yet. It started to bog at idle, regular RPM is 900/800 and it would drop down to 400. If i gave it gas, it would stay on but if I didn't it would turn off. I installed a fuel pressure gauge and the pump seems to be at 8 psi constantly. Now the car is idling good but now it has hesitation when i give it gas to accelerate. any help is welcomed.

P.S. I have a regulator that im going to install today or tomorrow.

 

[Pontiac455]

max fuel pressure for that carb is 7psi

 

[o ARC ATHEISTxX]

max fuel pressure for that carb is 7psi

I know that, ... my gaskets are thrashed due to the pressure?

 

[Pontiac455]

Check yer float level. When u install the regulator set it ot 6 1/2, if problem sitll exsits with acceleration yer gonna have to try differnt squirters and cams untill u have a clean crisp response. Make sure the accelator pump overide spring is adjusted correctly. Another note if the idle mixture screws are not set properly it will play hell with yer throttle response as well. They take a bit of playing around but worth it in the end....

 

[o ARC ATHEISTxX]

Check yer float level. When u install the regulator set it ot 6 1/2, if problem sitll exsits with acceleration yer gonna have to try differnt squirters and cams untill u have a clean crisp response. Make sure the accelator pump overide spring is adjusted correctly. Another note if the idle mixture screws are not set properly it will play hell with yer throttle response as well. They take a bit of playing around but worth it in the end....

I narrowed it down to a bad accelerator pump, just dont know if i should fix it, get it rebuild, or use it as an excuse to get the new 670 avenger

 

[CHRIS.O]

Either way you go, buy a quality regulator and set it properly for whatever carb you use. Over pressuring a carb will mess it up in short order.

 

[Pontiac455]

Hey man, check the bushings in the throttle for play and the base of the carb for truness. If both are fine yer good to go. Get the list number of the carb off the choke horn and grab a kit and install and clean er up man. Kits r only cheap and ya will learn some as well. Holleys are the best as far as i am concerned, easy to work on.

 

[o ARC ATHEISTxX]

The accelerator pump actually looks. Good. I'm gonna keep tearing it down. I think I am going to buy the rebuild kit.

 

[o ARC ATHEISTxX]

Turned out to be my rotor, but i still went ahead and rebuilt the carb, changed over to accel wires and put a stock coil, switching back to my MSD coil tomorrow. The car still has to get the air/fuel regulated but it snaps my neck like crazy when i gun it at 3000+ rpm in first gear.