Using a Snap On M2500, the codes were 13, 15, 21, and 25.
21 was the temp sensor. The ohms dropped like a hammer, so it has been replaced. Idle changed, but code still apears.
15 is the TPS and/or the Idle Speed Control. The TPS has issues. The ohm range is off, and off the car appears to have drops throughout the movement (saw that tonight). It will go from 3.7 to a 3.2, and back to 3.7, and at one time dropped from 5.2 to 1.9 and back. The drops are repeatable.
13 and 25 are in the air intake mechanism. The ohms check and signal feed appear normal, but the Baro sensor reads 37.9. My Haynes book says 29.9 at sea level and drops with elevation. I tried a second air intake assembly from a junk yard, and the Baro had the same reading.
Wednesday, July 9th, 2008 AT 3:45 AM