Idle Issue (Not The Typical Mitsu Idle Stepper Issue)

[Jayz-1]

Howdy all...

I have a quick question about how my car idles...

Basically I have disconnected my idle control valve as its the good Mitsubishi stepper motor type that always dies.
I adjusted the cars idle screw so that the car idles at 800rpm (this was done on a 30deg - 35deg day)
Now the car idled fine, air con on and the revs would drop to 750rpm, drove nice, never hesitated or carried on etc etc

As the outside temp goes down the idle comes up to the extent that on a 20 deg day the car will idle at 1500rpm.

The car is running a Motec and the air temp compensation tables have all been configured, thinking that they might be slightly wrong I put the air temp compensation table all to 0% just to see what would happen, and the exact same idle issue happened.

Next thing I tried was spraying CRC around the inlet manifold while the car was running to see if there were any air leaks, but none were to be found

Does anyone have any idea what could be causing this?
Could it be the tune some how? (I have also changed the timing and fuel around idle to see if it helped but no luck there either)

This has been an issue for quite some time and no one that i have spoken to knows, so trying the forums is my final hope

Thank you in advance

Jason

 

[Entaran]

You have some of bubba's earwax in yoru FIAV. Plug it

 

[Jayz-1]

lol Entaran...
Thank you for the reply...

I thought I would do some more research what you said, it still doesn't make sense to me that Mitsubishi would use this "wax" to control idle, as it just seems dodgy to me..

For those that aren't familiar with this system my understanding is that there is another air bypass at the bottom of the throttle body where the water lines are connected, and there is some "wax" that when the water is cold it's hard, and lets air past (higher idle), then as the temperature comes up, the wax melts and covers the hole and reduces the idle...

So I pulled the throttle body apart and have blocked that up and it seems to be working

Thank you again for pointing me in the right direction Entaran...

Jason