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I found my leak. I was looking for cracks on the backside of the intake and found a nipple that I did not know existed.. I feel like an idiot.
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I will ask my tuner to post one. I will also start looking for that vac leak. Thanks for the help so far guys.

Would that also cause the VEH to go in and out of closed loop? My brakes also feel pretty hard. Maybe the booster or line is leaking. I need to take a good look at the intake too this engine has been...

This is an LS swap in a 91 Corvette.
specs:

built/forged 5.3 347 iron block with 241 heads

MS3 cam
237/242, .603"/.609", 113 LSA

LS6 Intake

Great info..This is my first post .. I'm subscribing :)