Right Carb?
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Freshman User
Joined: Dec 2011
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Right Carb?
I have an autolite c8zf-g on my 78 F150 custom 400cid. I was pretty sure it wasn't original & started checking it out. seems to be off of a mustang. it runs great at idle but hesitates & is hard to start when the fuel tank is low or it's warm. anybody know if this carb is not good for this application? or maybe a weak fuel pump?
Cranky Old Guy
Joined: Mar 2008
Posts: 3,562
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From: Raphine, Virginia
Hesitation off idle is usually the accelerator pump. Here is some info on the carbs: https://www.ford-trucks.com/forums/1...eral-info.html
Fleet Owner
Joined: Dec 2009
Posts: 20,678
Likes: 82
From: NorCal
I have an autolite c8zf-g on my 78 F150 custom 400cid. I was pretty sure it wasn't original & started checking it out. seems to be off of a mustang. it runs great at idle but hesitates & is hard to start when the fuel tank is low or it's warm. anybody know if this carb is not good for this application? or maybe a weak fuel pump?
If it's a 4100, look on the right side of the carb body for 1.08 or 1.12. The former is around 480 cfm and the latter is 600 cfm.
2x.. a bog is usually the accelerator pump. There is an arm to the pump that can be relocated to the inboard hole if it needs a stronger shot. If i's maxed out, you might as well throw a $25 rebuild kit at it.
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