The truck idles fine until you step on the brakes. Then the idle drops and fluctuates badly. No vacuum leaks. Once you unplug the brake switch the problem dissappears. It only does it when the brake lights come on at idle. ECU checks OK and all grounds are good and the harness seems to be in good shape.
Am stumped on this one.
have the same problem?
Tuesday, February 26th, 2008 AT 12:11 PM