Hi all.. I had my evo garaged for around 1yr. I drove it for 3 day's no issue's at all. I came to turn it on, it starts but you have to keep pressing the accelerator all the way otherwise it turns back off . Even when driving it up the road, as soon as you stop acceleration it turns off. What could the issue be? I topped it up e85 and still the same. Any suggestions?

 

Could be a failing IAC, there is a how to test it video around if you search it.

I also had some stalling issues that were tied to a vacuum leak so I'd probably start with those 2 things.