Thanks for the quick reply. I have now used an OBDI coder reader (glorified jumper). I simply get code 12 (the handshake code), but nothing else. My idle continues to flucuate primarily when I've been driving the vehicle for a number of miles and have shut it off. When I restart, the idle "hunts" from 200 to 1000 RPM and will settle but the engine still sounds like it is surging mildly. I've had several vacuum leaks repaired, leaky injector cover reparied, and replaced nearly every sensor but MAP sensor. I'm stuck!
Wednesday, September 8th, 2010 AT 9:02 PM