Low fuel pressure with new pump
#1
Low fuel pressure with new pump
I have a 1967 Cutlass Supreme. I've recently replaced the motor with a 350. The fuel pump has only two lines. There is no fuel in the carburetor when I park it for the night (in the morning) and no fuel is being pumped when I turn the motor. When I prime the carb with gas, it will start on the second crank and then there is sufficient flow of fuel to the carb. If I accelerate it, it will not provide enough fuel.
I have replaced the fuel pump with a new fuel pump. Any idea what can be causing this?
Cheers,
I have replaced the fuel pump with a new fuel pump. Any idea what can be causing this?
Cheers,
#7
Thank you once again for the wonderful replies. It's like, I go to bed and when I wake up it's a new day!!! Complete with new replies and new support for my yesterday's problems.
Does my fuel filter have *the ant-drain back valve? My carb mech thought to leave it out as unnecessary because they sometimes stick.
I'm going to do my testing today: check the fuel pump by placing fuel containers before and after the pump. Visual all my lines.
I will report back.
Cheers,
Does my fuel filter have *the ant-drain back valve? My carb mech thought to leave it out as unnecessary because they sometimes stick.
I'm going to do my testing today: check the fuel pump by placing fuel containers before and after the pump. Visual all my lines.
I will report back.
Cheers,
#8
After replacing the rubber hoses at the fuel tank if you still have the same problem it could be due to the carburetor leaking. Q-jets are notorious for leaking fuel under the primary jets. This can be fixed by rebuilding the carburetor and sealing the bottom of the primary jets with epoxy.
#9
Note, pay particular attention to the hoses between the tank and the hard line above the rear axle. I've had this problem before on several cars at that point.
After replacing the rubber hoses at the fuel tank if you still have the same problem it could be due to the carburetor leaking. Q-jets are notorious for leaking fuel under the primary jets. This can be fixed by rebuilding the carburetor and sealing the bottom of the primary jets with epoxy.
#10
Kind of like this?
Edmonton-20130908-00218_zps1e0e3d5a.jpg
This is what I added,
Edmonton-20130908-00220_zps49b9f420.jpg
I tried to take a video, this is while the car is running. The bubble only fills to 1/8th so yeah, still drawing air. Next I'm gonna drop the tank (yuck).
Cheers,
Edmonton-20130908-00218_zps1e0e3d5a.jpg
This is what I added,
Edmonton-20130908-00220_zps49b9f420.jpg
I tried to take a video, this is while the car is running. The bubble only fills to 1/8th so yeah, still drawing air. Next I'm gonna drop the tank (yuck).
Cheers,
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November 18th, 2014 05:14 PM