lost throttle response from 351W
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Junior User
Joined: Jan 2005
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lost throttle response from 351W
i had to replace the fuel pump and went with a holley electric pump. i'm showing around 5.5psi of fuel pressure at idle. if i ease into the throttle, it's fine, but if i stomp it, it just boggs and will even cut off. what gives?!
Cargo Master
Joined: May 2007
Posts: 2,071
Likes: 36
From: British Columbia
Maybe you've got a clogged filter, or a bit of crud in the carburetor which is partly clogging a main jet.
Are you able to check the fuel pressure reading when the engine powers out?
Why did you use an electric fuel pump?
Are you able to check the fuel pressure reading when the engine powers out?
Why did you use an electric fuel pump?
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Junior User
Joined: Jan 2005
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i went with an electric pump because it was easier than replacing the eccentric and the mechanical pump. i also put on an electric fan at the same time. i know it's not a clogged filter because i replaced that too when i replaced everything else. i've tried it with no filter at all and it's the same thing.
New User
Joined: Dec 2007
Posts: 15
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Hey guys, I have a 79 100 with a 302/ 2 barrel, and it does the same thing. I have a new stock manual pump, and i have cleaned the carb and replaced the filter. It idles like a champ, but if i don't pedal it, it cuts off when I try to pull off. Will weak ignition or bad plugs cause this? I have the duraspark POS ignition system with vacuum advance distributor.
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