Hello, I have the moparman Hi idle switch. It is an older model (fits in the cubby and has etched backing plate). The issue I am having is once I turn the switch on regardless of position is that CEL comes on and Temp gauge goes full over into red zone. Truck does not idle up or go into 3cyl mode. I did not have a chance to check what code it throws as result and just wondering if anyone has had this issue or knows what the problem is. Help would be appreciated as winter is pretty here in Canada and it is super nice to have the switch working.
Thanks, Jon