HELP!! Holley 4180
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Junior User
Joined: Jan 2004
Posts: 66
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HELP!! Holley 4180
Ive just installed a holley 4180 w/ an edelbrock performer 400 intake on my 79 bronco. i drove it all day yesterday and it ran great. I started it up this morning and it bogged down when i hit the gas. It also decided to backfire out the exhaust and carb
First, how would i tune the carb?
Second, what would cause it to backfire?
First, how would i tune the carb?
Second, what would cause it to backfire?
Elder User
Joined: Mar 2003
Posts: 628
Likes: 0
From: Colorado
Chances are, it's jetted wrong.
A recent thread over a FSP mentions an excellent article on Holley tuning - http://www.bob2000.com/carb.htm.
Holley books recommend that you only raise or drop the jet size by one number at a time, and drive the vehicle for a day or two before re-examining the plugs. Get a can of carb/choke cleaner to clean up the plugs each time - 'til you get it right.
A recent thread over a FSP mentions an excellent article on Holley tuning - http://www.bob2000.com/carb.htm.
Holley books recommend that you only raise or drop the jet size by one number at a time, and drive the vehicle for a day or two before re-examining the plugs. Get a can of carb/choke cleaner to clean up the plugs each time - 'til you get it right.
