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Unread 04-08-2013, 09:26 AM   #1
jeepdawg3
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1982 CJ7 
 
Join Date: May 2012
Location: Clermont, GA
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How to make amc 360 motorcraft carb stop running rich?

I have an 82 CJ7 with an AMC 360. It has the factory motorcraft carb. I have rebuilt carb and all adjustments seem correct. Still runs rich. Any ideas? Thanks.

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Unread 04-08-2013, 09:35 AM   #2
revelc
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1985 FSJ Wagoneer 
 
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By replacing it with a Holley
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Wag Rebuilt 360, 260H, 727, Locked 44, AMC 20, 208, 31" M/T's, 4" Rustys, 2.5" Duals. SOON:SOA SF, 496, T400, Doubler, D60's, 37" M/T's <-TOY
Cherokee Rebuilt 360, 2" Duals, mostly stock. SOON: Hot Street 401, 4'' Rustys, 33" BFG A/T's maybe a T-case to get rid of Q-Track <-TOW RIG
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Unread 04-08-2013, 09:36 AM   #3
Matt1981CJ7
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When does it run rich, idle, partial throttle, WOT, or all of them?

Matt
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Unread 04-08-2013, 09:46 AM   #4
jeepdawg3
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Pretty much all of them. I have the mixture screws down to about one turn. It is better but still rich. I thought about replacing but from reading around the forums, these carbs get a pretty good rap.
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Unread 04-08-2013, 10:21 AM   #5
Matt1981CJ7
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I assume it's a MC 2150.

It could be a bad needle and seat, or misadjusted gas-soaked floats. When was the last rebuild on the carb?

Lastly, depending on the year of the engine, and what it came out of (a 360 wasn't a factory option for a CJ), the carb may be set up to have "controlled vacuum leaks". For example, a charcoal canister is a controlled leak because it doesn't hold vacuum. Therefore, the leak adds air to the A/F mixture, by design. If you, or a PO, disconnected and plugged this "controlled leak", the carb would run rich.

Hope this helps,

Matt
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