4 Barrel Holley Carb Issues HELP!!! - MustangForums.com



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Old 06-17-2010, 11:49 PM   #1
jaxen
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Default 4 Barrel Holley Carb Issues HELP!!!

I've got an 83 GT 5 spd. Im new to this whole carb thing so dont hate me if this is a dumb question. So on a 4 Barrel, the car runs on two barrels until it reaches a certain rpm then the other two kick in? I used be able to mash the pedal and the car felt like it would switch gears, almost like an automatic, and take off like a turbo. Im assuming thats the two other barrels opening? After my carb rebuild the car just slips like crazy when I do this and hardly accelerates. It doesn't feel like it wants to engage anymore unless I lightly let off while its slipping. Could that be something wrong with the other 2 barrels opening or is my transmission or rear end now messed up? If those are messed im going to be uber pissed because there was nothing wrong with the car before the carb rebuild. Any help with this would be awesome.
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Old 06-18-2010, 03:39 AM   #2
67mustang302
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Are you saying the transmission is slipping?
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Old 06-18-2010, 08:58 AM   #3
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Originally Posted by 67mustang302 View Post
Are you saying the transmission is slipping?
I guess thats my question, Im not sure. Is it possible for the carb to studder / slip like that when the 2 other barrels engage.
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Old 06-18-2010, 03:44 PM   #4
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If you're having signal issues with the carb the engine can stumble at WOT at lower rpm.

You're going to have to describe exactly what's happening and when it's happening.
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Old 06-19-2010, 03:37 PM   #5
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It happens when I accelerate hard, not necessarily WOT or low rpm. Just when the other two barrels seem to engage, if thats whats going on. When I accelerate hard it really almost feels exactly like when you floor an automatic. It feels like its switching gears within the gear I'm in, if that makes any sense. I know the car has an upgraded rear end but I'm not sure exactly what it is. The original owner upgraded it and I bought it from the second owner who didn't know. It always worked fine before the carb rebuild and now its messed up. If its the rear end then the idiots who worked on the carb must have beat the **** out my car. Its also idling real low and sluggish. Do they make rear ends that "switch" gears within a gear on a 5spd?
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