so when the car is cold and i start it the idle bonce up and down and when i un hook the vacum line that goes to the map sensor it idles fine and when the car i warm i plug in the vacum line and it runs good so this is probly and dumb ??? does that mean that the map sensor is bad any input will help
No, but there will be a CEL. If you're willing to open up the ECU there's a way to convert it(depending on ECU it could just be moving a resistor, jumping a resistor, and/or removing a resistor).
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