running erratic I recently aquired a 1951 Ford Custom 2dr. V8 3spd. The car starts right up, however, it stumbles. It runs better with the choke part way out. Any help would be greatly appreciated.Thanks.
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Re: running erratic Check fuel flow to the carb as the engine is cranked by removing the line from the carb and placing it on a container to catch the fuel. If the flow is low or uneven, there is an obstruction in the line, or at the pickup in the tank. If the flow is good, the carb is the culprit, and will likely need adjustment or a rebuild. If the gas is old or contains particles,
the tank or line is probably rusted. If you have any flexible parts in the fuel line, such as between the pump and carb, the interior of that part may have been compromised by alcohol containing fuel, causing an internal collapse restricting flow. |
Re: running erratic Has the your "recently acquired" car been sitting in storage or unused for a long period of time? After a long winters nap, my '53 was awakened to a nasty fuel delivery problem - terrible hesitation and rough idling. I was going to replace the carb with a spare but decided to use some Chevron Techron Concentrate Plus fuel additive/conditioner that I purchased from O'Reilly's first. The result was impressive as it resolved the problems.... I drove the car around for about 10-15 minutes and the carb cleared right up. Its been running fine ever since. I'm impressed with this stuff....
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Re: running erratic I forgot to mention, the car has an electric fuel pump, and was on the road last year.
I also used two cans of Seafoam gas treatment. |
Re: running erratic if it stumbles, make sure the accelerator pump is working. carb might need to be rebuilt...
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Re: running erratic Quote:
ALSO you may want to look back in the archives BUT with "electric fuel pumps" you "MAY" also look at what the PSI is the electric fuel pump pumping at.....IF memory serves me.....you should be around 3-4 psi from a stock pump and "MOST" electric pumps are 6-8 psi SO that could be an issue as well SO IF you plan on keeping the electric pump in your system then you may want to look at a pressure gauge and/or a pressure "regulator" as well!!!! |
Re: running erratic Thank you for all the replies. I will let you know how this turns out!
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Re: running erratic A new carb swap cured the erratic idle. Now...I cannot get motor to idle down unless I physically move the linkage. I have lubricated ALL the linkage parts/joints. I lubricated the bottom of the gas pedal. The carpet is NOT touching the linkage, The return spring is still functioning on the firewall. I cannot find a location where the linkage may be binding. Any thoughts would be appreciated.
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Re: running erratic try backing off the Idle adj. screw on the throttle shaft where it connects to the linkage, also you may have some mis-aligned butterfly plates allowing the throttle shaft to bind allowing the fuel air mixture to pass through .
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