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07-13-2012, 08:35 AM
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
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(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.
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Do you have a header?
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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)
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