i posted previously the problem with the hunting idle for my 925.0. i replaced the iac and the problem still occurs. i was told to check for a vacuum leak from the map sensor vacuum lines from the upper or lower plenum. does anyone know where i can find the lines and what should i look for to know if they are bad and that is the problem?

 

If your car is a '89+........ the MAP sensor does not use a vacuum hose, it's a BP sensor..... suggest to check the system for failure codes, run the DIY KOEO/KOER/Cylinder Balance Self-Test and verify what might be wrong with the EEC system. LUK