Hey guys quick question I have the sct flasher for 2 yrs now running 91 but I down graded my gas to 87 stock cause I drive to work now but once I put the car to stock I had an engine light code P0455 I cleared it with sct and came back so I tried something using 87 with the custom tune and no engine light why is that
(07-13-2012, 08:35 AM)07focus_st Wrote: [ -> ]Hey guys quick question I have the sct flasher for 2 yrs now running 91 but I down graded my gas to 87 stock cause I drive to work now but once I put the car to stock I had an engine light code P0455 I cleared it with sct and came back so I tried something using 87 with the custom tune and no engine light why is that
Hard to figure - IIRC that's the gas cap code.
If its gas cap then it could be a vacuum leak at the egr, if your tune disables it. (which woul be why it goes away when the tune is back in)