hey fellas.

heres the story..
i had a check engine light but it went away after a day for some reason about 2 weeks ago. i then started noticing that my idle would go up to 1500 rpm randomly. i noticed that the my boost guage ( set to coolant temp in dsmlink) would go all the way down causing my idle to go up to 1500 rpm to 2000. but i noticed that once in a while when the guage does go to normal temps, that my idle would be perfect at 750.

so im guessing its the ECT sensor or maybe the harness. ima change it sometime this week when i get a free time but i was just wondering on what you guys think is wrong with it. stuck termostat? or any other reasons?

my FIAV is blocked off if tat clear things up.

thanks
ian