[stevepatfred]

Hi folks. So this one has me stumped. You may recall I was talking in a thread a few weeks back about running lean under boost, and determined I would need an adjustable WUR and solenoid.

Well after that I went away on business for 12 days, parked the car in spec, great idle, smoothe hard pull, just a little lean at very high RPMs.

Came back, took the car out, and it was immediately extremely RICH, at idle and all thro if I the range, RPM at idle had jumped to 1500 and on boost AFR in the 9’s (was previously 11.5-12. Tried adjusting mixture and idle and it’s all out of spec. Idle now 13.5-14 and on boost still in the 9’s, and bucking.

What could have changed? The car was in a dark garage untouched. Could it be an air leak? Or WUR? I’m stumped, and a little frustrated to be honest. Engine is 500 miles into a complete rebuild, every line and hose changed, WUR rebuilt also. At thoughts??