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Old 07-02-2009, 01:10 AM   #19 (permalink)
ZYUL8R
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Quote:
Originally Posted by racerxj17 View Post
just to clarify, cooler air (denser) will make the A/F go leaner, and hotter air will make the car run richer.
Yes, the ECU gets a hot Intake temperature it cuts fuel to keep the A/F ration in place, which robs performance.

With cooler Intake temperatures it doesn't do that.

Ever notice your car running good on a cold day...its the ECU giving more fuel to burn with the denser air.
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