Trying to help a buddy out since I have a V2 Scan/Tune to get his Denali up and drivable after he did a complete DOD delete and LS9 cam swap, lifters, ect... The correct cam, cam gear, front cover and sensors(spliced according to kit) are installed and correct. It also took the crank relearn just as it should. AFM is turned off in the tuning as well as matching the DTCs to disabled to match an ls3 Camaro in terms of cam sensor and the afm solenoids to not reported. It will crank and idle fine and drives well with no issues but once he goes to put gas in it (takes cap off even though not running and tries to refire after pumping) it will struggle to crank. The purge solenoid at the intake is then going crazy. You can take the hose off the intake and it fire perfect every time as it should. Am I missing something in the tuning somewhere? This is just to get him going without a hiccup till he can get it tune a dyno and a tuner. Also, its just intake, exhaust and DOD delete/LS9 cam. factory manifolds and cats.