1993 Lexus ES 300 6 cyl Front Wheel Drive Automatic 180000 miles
Hello. I have a 93 Lexus ES300 with about 180,000 miles. Before you groan, it is in pretty good shape; completely tuned up, new wires, etc. Recently it started having a problem idling. It would start ok, but you had to hold the gas pedal down a little or it would stall. Driveability was ok otherwise. It has worsened to where now if you are driving along and take your foot off of the gas it will stall out. I readjusted the throttle stop screw, no change. I took apart the IAC valve and cleaned it and lubed the motor. Tested it and it works fine. No change. The codes 24 and 31 (Intake air temp and MAS) keep coming on. I have tested ECM voltages and resistances of the sensors and they all seem to check fine. Please help. It is my daughter's boyfriend's car and she is starting to give me a hard time about it! Thanks.
Tuesday, February 5th, 2008 AT 10:04 PM