Have to at least get it on a wideband O2 to check the Air Fuel Ratio, you wanna see 11.5 to 1 with about 20 degrees of spark advance!
does 2004 Mustang cobra need retune for smaller pulley
looking at buying an 2004 cobra with smaller supercharger pulley but owner says engine computer hasnt had a new tune for smaller pulley does it need one? thanks
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I wouldn't trust a canned Predator tune when running Forced Induction!! Like I said before at the very least check your Air fuel and spark advance!
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