hey all.
ive got a 02 750 ss with DP exhaust,DP airbox,stock ECU and a power commander 3. i get a misfire at 4.2 thru 4.8 RPM's. (its not backfire as it originates from under the tank in the engine.) i suspected an ECU fault and thought the power comm. would correct it but it didnt. actually it made it worse from 4.4 to 4.8 rpm's! mileage is at 4200 so its still under waranty.
anyone out there have any sugestions? i just dont want to turn it over to a dealship and not have at least a couple ideas what to expect.
thanks.