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1997 - 2003 Ford F150 General discussion on the Ford 1997 - 2003 F150 truck.

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Old 02-02-2019, 11:41 AM
  #21  
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Originally Posted by Duces2you View Post


feathering in at stages it will rocket away. But even at cruising speed if i jump on it it will hesitates and I’ll have to back off the throttle and then everything starts firing right again.
yep that's accelerator pump all the way. Mine did the exact same thing. when you jump on it that pump is supposed to give the engine a quick shot of fuel until the venturis can catch up. If that is not working, when you jump on it you are essentially causing the engine to lean WAY out, hence the hesitation and popping you hear

I take it this is your first vehicle with a carb?
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Old 02-02-2019, 02:49 PM
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650 cfm is a bit too high for a mostly stock 302. The 85GT had a 550 CFM Holley from the factory, and I put a 650 Edelbrock on it. I had to have my Buddy's Dad re-jet it and mess with accelerator pump to make it run right. The nice thing about Edelbrock carbs is, almost everything is external, and they run really consistent.

Just an FYI....

But yeah, your accelerator pump needs adjusted.
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Old 02-02-2019, 03:08 PM
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Itís my first carb yeah. 1st mustang
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Old 02-02-2019, 03:09 PM
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Originally Posted by white89gt View Post
650 cfm is a bit too high for a mostly stock 302. The 85GT had a 550 CFM Holley from the factory, and I put a 650 Edelbrock on it. I had to have my Buddy's Dad re-jet it and mess with accelerator pump to make it run right. The nice thing about Edelbrock carbs is, almost everything is external, and they run really consistent.

Just an FYI....

But yeah, your accelerator pump needs adjusted.
i have a high duration cam Iím gonna put it Iíll order a rebuild kits for the carb too
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Old 02-02-2019, 06:35 PM
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Unless it's leaking fuel, which is pretty unlikely because all of the gaskets are above the fuel level, you can pretty much re-jet that thing on the car. They don't make as much power as a Holley will, but the trade-off of more predictable driving is what sold me.
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Old 02-07-2019, 12:31 PM
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Changed out the accelerator pump and the jets above the floats and it seems to have helped. Now its not an eternity between jumping the pedal and power hook up up there still is a stall and a popping and grumbling. Iíve changed around the armature points and it all seems to be about the same.

Also found an old invoice on the carburetor. Its a 600CFM
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Old 02-07-2019, 12:33 PM
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Originally Posted by Duces2you View Post
Changed out the accelerator pump and the jets above the floats and it seems to have helped. Now its not an eternity between jumping the pedal and power hook up up there still is a stall and a popping and grumbling. Iíve changed around the armature points and it all seems to be about the same.

Also found an old invoice on the carburetor. Its a 600CFM
check your timing, also your mixture screws might be too leaned out
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Old 02-07-2019, 09:49 PM
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Yeah... sounds like maybe your timing is off. Start at 10 BTDC, then slowly advance it 1 degree at a time. I believe my carbed 85 GT ran best at 12 BTDC, while my 89 GT likes 14 BTDC. Lots of factors there, but 10 BTDC is base timing.
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Old 02-08-2019, 07:55 PM
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Nvm
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Old 02-08-2019, 08:51 PM
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Disregard
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