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Old 07-25-2007, 06:50 PM
onefastmustang's Avatar
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Join Date: Jun 2005
Location: Fairfield, ca
Cobra Make, Engine: CRII with a Stroked Windsor
Posts: 976
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Default Make it run lean
Good evening fellow cobra enthusiasts.... I need some guidance..

I have procured 2 different motorcraft 4300 carbs, both remanufactured from Holley.. Neither of them has been able to be dialed in lean enough to pass smog. Is this a crap shoot to get one that works or is there something I can do to assist them in achieving the right AF ratio. My mechanic friend told me today to just keep returning them as only 1 in 4 usually good but what a PIA...
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