Help me diagnose my problemeo please!

[hail2theTheif]

So I have the most random issue going on with my motor. It's a ej20g top end with an 04/05 STi shortblock, 550cc inj, and power fc.


The car is stalling after driving around a bit after warm up. So starts up great and idles great. Drive around but during that first 10 min when I go into neutral coming up to a stop light the car will just die when I take it out of gear. Only happens during first 10-15 min of driving. Smells like lots of fuel after starting right back up.

Car pulls amazing and drives totally normal after first 10-15 min and doesn't do the stalling if I were to go park somewhere run errands and then start it back up. Basically only in the morning or after not driving for a long time. Could it just be my ecu map?

I have noticed that totally randomly sometimes the idle sitting will hunt from normal (850) down to around 3-400 up and down, up and down and eventually go back to sitting at 850.

Any ideas would be great. Sorry for the long post.

Thanks!

* Registered users of the site do not see these ads.