Originally Posted by clean4.6gt
98 gt. I just started using 93 octane. The car runs so much better on it I could definitely feel a difference. But now my idle hangs at a high RPM when I'm driving and If take my foot off the gas it will still hang and if I push in the clutch it will still hang for a while and then slowly come down as well. Any ideas on why. The car idles perfect at a stop. Thanks
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Would it make a noticeable different using 93 octane even without a turner?
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99 Mustang GT F.R 3.73s, MGW Short Shifter, BBK Cai, BBK 70mm Throttle Body, Mach 1 Chin Spoiler, SR Lowering Springs, Koni shocks and struts, Mach 1 Grill Delete, Black Billet Fuel Cap, Trick Flow 75mm Plenum, Raxiom Smoked Tail lights, Magnapack Mufflers