I recently purchsed a 1988 Chevy G 20 conversion van with a 5.7l TBI and TH
400 tranny. When I bought the van it was idling high and a friend of mine hooked it up to his Snap On scanner and got 4 codes, 15,22,44 and 45. I replaced the Idle Air Control unit, the ECT sending unit, the O2 sensor, and the idle is unchanged. What else could it be ? Please help, I have to drive this thing to Florida soon !- posted
18 years ago