Idle normal when cold, but high when warm
Idle normal when cold, but high when warm
Ok, I got tired of looking through idle problem threads. I couldn't find many that were having idle issues only after the car was warm. So anyway, when I first start the car in the morning, it goes to 700rpm and stays there (emissions and cold start assist removed) Anyway, once I pull through the gears once...the idle comes back down and settles at about 1500 rpms. Pretty darn sure it's not a vac leak. What else would cause it to have a normal idle at startup, but a high idle after the car is warm?
If you have the thermo-wax & it's cold start fast idle cam, the cold start idle should start at 1500.
Then it should ease back as the coolant warms up.
My guess- The fast idle cam is not working at all and your throttle is sitting on the hard stop.
Then as the engine & oil warms up the internal friction goes down & the revs go up.
The rotary engine idle torque is so low that a cold stiff motor will stall without some help.
My car has no thermo-wax or fast idle cam or AWS, but I still have the BAC & the air bypass solenoid.
Then it should ease back as the coolant warms up.
My guess- The fast idle cam is not working at all and your throttle is sitting on the hard stop.
Then as the engine & oil warms up the internal friction goes down & the revs go up.
The rotary engine idle torque is so low that a cold stiff motor will stall without some help.
My car has no thermo-wax or fast idle cam or AWS, but I still have the BAC & the air bypass solenoid.
Last edited by SureShot; Jan 27, 2006 at 03:02 PM.
Originally Posted by X-JaVeN-X
What else would cause it to have a normal idle at startup, but a high idle after the car is warm?
Did you remove all of the linkages associated with the thermowax? Not doing so can result in a high warm idle. Do you still have the BAC valve? If you do what happens if you unplug it? If you don't, and assuming you have no vac leaks, try winding the primary throttle stop screw out.
alright...the car is doing a little bit of a different idle now
it starts up at 700 and slowly rises to ~900-1000rpm, over about a 1 minute time frame. Then after it warms up, it idles at about 1300rpm. Gonna try the above things when I get a chance.
it starts up at 700 and slowly rises to ~900-1000rpm, over about a 1 minute time frame. Then after it warms up, it idles at about 1300rpm. Gonna try the above things when I get a chance.
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