paran0id Posted February 10, 2005 Report Share Posted February 10, 2005 My 97 deville has been having problems recently. sometimes while idiling (like at a red light) the RPM's drop below the normal 625-675 range and the car will stall. It will usually start right back up again and may or may not continue to act up, and then it might be fine for the rest of the day. I have also noticed that it does it sometimes when i am decelerating to come to a stop. Usually if the behavior continues, I can keep it running by shifting to neutral and stepping lightly on the accelerator to keep the RPM's up while shifting into drive, but I know this is not good for the engine or tranny. In addition, the car will occasionally require three or four cranks of the ignition before it will start. The starting problem doesnt seem to matter as to whether the car is hot or cold, sometimes it does it, sometimes it doesnt. I dont know if it is related to the stalling or not. Here are my trouble codes, (all are history codes) any help as to where to begin looking is much appreciated. PCM P1377 IC Cam Pulse To 4X Reference Pulse P1599 Engine Stall or Near Stall Detected P0372 IC 24X Reference Circuit Missing Pulses P1520 Transmission Range Switch Circuit P1579 P/N to D/R at High Throttle Angle - Power Reduction Mode Active IPC B2710 PASSKey Open/Shorted Pellet U1255 Class 2 Communication Malfunction (Serial Data Line Malfunction) PZM B1971 Inadvertent Power Link to comment Share on other sites More sharing options...
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