Very frustrating fuel or motor problem |
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Very frustrating fuel or motor problem |
hars914 |
Jun 21 2004, 05:41 AM
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#1
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Member Group: Members Posts: 114 Joined: 6-January 03 Member No.: 94 |
I need help on this problem. It happened out of no where.I have a 71 which just
went thru a 3 year resto. The motor is a 4 cyl. 2.0 built up to 2.4 with weber 40idf carbs and about 1200 miles on the new motor. I was having what seems to be a fuel problem. I would take the car out and after about 15 or 20 min. the motor would start stumbling like it was not getting fuel. It would get worse then start to stall. I removed the gas tank and it was spotless on the inside,I removed the screen and cleaned it, I made sure the line from the tank to the carbs is clear. I installed a new Carter pump,I removed the Holley regulator and ran new -6 lines to the carbs. When I fired it up with the new pump it was pumping about 5 or 6 psi and I noticed it would drop to about 3.5 psi after it would start stumbling. Ther are no kinked lines.What am I missing here. I also removed the carbs and cleaned out all the jets. Could this be motor related? |
hars914 |
Jun 21 2004, 10:44 AM
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#2
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Member Group: Members Posts: 114 Joined: 6-January 03 Member No.: 94 |
I added another vent at the cap. I have a Russell micron filter located at the end of
the fuel line right before the tee fitting. As far as the line collapsing at the tank I will have to check it.My main line in the tunnel is a 5/16" hard line. I can hear the pump running all the time even when it starts missing. I installed a painless fuel pump relay kit so I know I am getting good power. As far as vapor lock, my lines are not near the exhaust and my pump is in the front trunk.I also wrapped the line where it exits the rear firewall with heatwrap.This is really a strange problem. Like I said it just started out of nowhere. I never had the problem in the first 1000 miles of driving. |
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