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GreenBrick · Mar 31st, 2024, 21:34

I know you have tried the blocking off the IAC, but are you sure it hasn't stuck? Only a 10 minute job to clean it out and pop it back in.
I had this all 3 of my 900s. The IAC gets sticky and once warmed up the RPMs don't drop.
I used carb-cleaner to flush it out then a drop of engine oil to lubricate it. Don't use any silcone based oil like WD40 as this can contaminate the cat.
It should be free enough to rattle back and forth if you rotate it.

Feel free to ignore this, but don't overlook the obvious, I have in the past and wasted a lot of time, and some dosh.

Mar 31st, 2024, 21:34	#3
GreenBrick SilverBrick Lives! Last Online: May 7th, 2024 12:24 Join Date: Apr 2015 Location: Poynton, Cheshire	I know you have tried the blocking off the IAC, but are you sure it hasn't stuck? Only a 10 minute job to clean it out and pop it back in. I had this all 3 of my 900s. The IAC gets sticky and once warmed up the RPMs don't drop. I used carb-cleaner to flush it out then a drop of engine oil to lubricate it. Don't use any silcone based oil like WD40 as this can contaminate the cat. It should be free enough to rattle back and forth if you rotate it. Feel free to ignore this, but don't overlook the obvious, I have in the past and wasted a lot of time, and some dosh. __________________ Jeep ZJ, 960, Past:- Mazda2, Jumbuck, V70 (2002), 945 (1995), Hyundai Coupe, Golf Mk4, Previa, Carina, 2 x Corsa, 4 x Astra, 944 16v (1991), Espace, Escort, Audi 80, Renault 21 Savanna, Polo, Mini Clubman/Pickup, Standard 8, Capri, Maxi.