I have a Hahn turbo set at 9 psi been fine for over a year & 10,000 miles. Also have aem failsafe. Yesterday after driving for a while it would start to sputter when you gave it gas and would see the afr drop down in 11 range then all of a sudden shot up. So got home pulled all vacuum lines and checked, also checked every hose and connection on the turbo. Pulled the plugs they look nowhere like the old plugs i changed out before winter no black what so ever. So changed anyways since they were out. This morning went for another ride everything was perfect until after about 20 mins and it starts it again. Turned it off and restarted still there. I seen the aem gauge hit up at 17 while in the throttle while it just sputters. I also used camera to look inside while plus were out and didn't see anything odd. So where should i look next to find the issue? Why would it cut out once it gets hot? My water temp is holding between 200 and 220.
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