I'm in the process of chasing a surging idle. I unpluged the map sensor and the engine runs perfect. It's a newer map sensor, and had same problem with the old one. I'm getting 5 volts to it. Has anyone come across this and found a solution?? I hooked up a scanner and the scanner shows under 1 volt on the return wire to the ecm and the highest I can get it to go is 2 volts with throttle. Any help would be great, thanks
