I have a 1997 Plymouth Breeze for a work car, and for the last six months or so it has been idling too slow, to the point of ALMOST dying. First thing I did was change plugs. I also changed the idle air control valve motor... to no avail.
I also have a pretty good OBD II code reader, but there are no codes set in the ECM. My reader will give real time readings of various sensors that can be observed during a drive cycle(engine running) . Only problem is that I don't know what the values should be at any given time. The maintenance manual does not offer this information.
Does anyone know where I can learn about what the sensors should be sending to the ECM in real time? I have searched the net for all I can think of. This has Nothing to do with the code reader function.
Bottom line is there is something wrong with my car's idle that does not set an ECM code. I don't want to just arbitrarily change various sensors or catalytic converters. So if anyone knows where I might look for guidance, I would appreciate the help.