freeze frame data shows ltft -14 at 1100rpms,scan data shows -2 AT IDLE THEN BACKS OFF TO -14 WHEN FANS COME [...] RETURN TO -2 WHEN FANS STOP. RAISING THE IDLE BETWEEN 1100 TO 1800 RPMS DROPS LTFTS TO -18 ON BOTH [...] PERGE HAS NO AFFECT,FUEL RAIL PRESSURE P... Login to read more.