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03OrangeSVT 07-31-2009, 07:36 PM After I cleaned up the tune on the Mustang I've noticed that the car seemed to run better at a richer than stoich AFR.... for example It was running in the 13's and the car felt great (at constant highway speeds) now that its at 14.7(ish) it just doesnt feel as good. Is it possible that the car needs to be a little richer than stoich??? 1turbofocus 07-31-2009, 10:03 PM Many things could be going on , very small exh leak ,vac leak , placement of o2 , have you tryed both sides for AF If 13`s feel better then leave it in the 13`s Tom 03OrangeSVT 08-01-2009, 05:12 AM Many things could be going on , very small exh leak ,vac leak , placement of o2 , have you tryed both sides for AF If 13`s feel better then leave it in the 13`s Tom Right now the wideband is in the downpipe so it should be getting a good, clean signal. I think I'm going to drop it back into the high 13's and see how it feels. I've check for leaks and havent found any. its just weird... when driving down the road at around 55mph the car feels gutless but the AFR is dead on 14.7..... if you give it a tiny bit more throttle(staying out of boost) it goes from wimpy to beastly. | |