Ok well my car has been sitting for about 3 months now due to me needing to replace my DP.

During the down time I've done the following:

1. Replace my heater hoses back by the firewall

2. Switched from a 16g to a 20g

3. Had a stock 3g muffler welded on my 3" exhuast

4. Updated my MS firmware

Now...what happens is I start the car and it will idle fine and if I go to drive it, it will stall out within a minute or 2. If I just let it sit and idle long enough...it will stall out as well.

I datalogged the symptom at idle and there is a point right before it stalls were my map signal and my rpms cross and my rpms go way up and my map signal shoots way down. I will post a screen shot of it tonight. Almost looks like the map does a reflection effect of the RPM if that makes any sense.

Why is it stalling out all the sudden? I didn't do anything out of the ordinary for this to happen. Could my IAT sensor be failing?

Also after the car stalls out, I can't restart the car for at least 5 mins after it stalls. And this is true for everytime it stalls.

I know it has to be MS related.

All help is appreciated!

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- 05 Subaru STi
- 97 eclipse gs (289whp w/ 276tq)