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Old 03-11-2009, 08:43 AM   #14 (permalink)
chiefpontiac
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At low load under part throttle you may be noticing teh 4 cylinder mode of AFM. If you can duplicate it at various steaedy state speeds under 76 mph and it always goes away when you step on it then that's what you feel, it is normal, and the only way to make it go away is to buy an aftermarket tune that turns off AFM.
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