I am having a problem on a 2002 honda accord. The idle is up and down. When i plug the map sensor in and bolt it down the idleing problem starts when i plug another one in with out it being in the location its suppose to be in it runs fine but for some reason its like the air in the throttle body sensor is not right any reason why this would happen?

 

check the coolant level. some time the IAC valve do sent open completely because need the coolant temp to operate properly. Disconnect the IAC valve plug and the engine shud go to idle. if not replace the IAC valve

 

He shouldn't need to replace the IACV first just take it off and clean it.

Coolant level is a good idea though, I would also check for a vacuum leak too.

 

ok thanks guys!!! I will try these tips and let you know what happens

 

I forgot to say that the coolant should be burped which means the air has to be purged from the system... but there should be no air in the system unless you have a leak or just recently added coolant.

 

I apperciate all the info. She is running beautiful now guys i owe yall one It was the iacv