jdab555
Greenie N00B Member
RESOLUTION: PCV valve hose had fallen off. Check your hoses.
I was at an autocross on Saturday, long story short at the end of my second run I came into the paddock and had a really rough Idle, jumping up to 1000rpm and then down to 400. AFRs going super lean at 20+ and boost vacuum is only hitting -6psi ish. Happens cold and warm, no change.
No oil or fluid leakage, no abnormal mechanical sounds in the engine bay.
Datalog is attached, something to note is the car runs better when I give it a little gas, AFRs richen up etc.
Looking for advice on where to start troubleshooting; one of the theories thrown around in the parking lot is that there is a pre-O2 leak at the downpipe to turbo connection, as it is missing a stud, and maybe the gasket finally gave out with the thrashing it got on Thursday?
Hoping to have time to run down and grab my old boost leak tester this week, but also looking for things to check today during my downtime at work.
I was at an autocross on Saturday, long story short at the end of my second run I came into the paddock and had a really rough Idle, jumping up to 1000rpm and then down to 400. AFRs going super lean at 20+ and boost vacuum is only hitting -6psi ish. Happens cold and warm, no change.
No oil or fluid leakage, no abnormal mechanical sounds in the engine bay.
Datalog is attached, something to note is the car runs better when I give it a little gas, AFRs richen up etc.
Looking for advice on where to start troubleshooting; one of the theories thrown around in the parking lot is that there is a pre-O2 leak at the downpipe to turbo connection, as it is missing a stud, and maybe the gasket finally gave out with the thrashing it got on Thursday?
Hoping to have time to run down and grab my old boost leak tester this week, but also looking for things to check today during my downtime at work.
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