1999 Buick Century Repair Question
High idle issue and intermittant shifting cause IAC, TPS?
What is the exact code number its setting now?
Will relay later. Also disconnecting IAC DOES NOT change idle issue
If you unplug it it cant change the idle keep me posted.
But how long does it take the computer to respond to the idle setting's return to normal?
Shouldnt take that long.
I'm looking for a good diagram for the vacuum lines and don't see one. Besides the one on the hood of the car, is there another one?
when I check the idle with the car being cold the idle is ok,just rumbling, however when the car temp heats up, it goes high. I can't find a leak in the vacuum system unless the leak is at the vac line that runs from the solenoid to the canister, and the canister is in the back of the car... I did a ohms/resistance check of the IAC valve and it checks good unless the valve is just plain worn out.
See if the canister purge solenoid is stuck open?
One other has me wonder bout the solenoid, fuel gage doing weird stuff and heavy fuel fumes. Can you tell me exactly how many hoses are connected to the solenoid?
There should be the vaccum source from the engine and another hose that goes back to the canister.