09 Corvette with heavy modifications including a Harrop Hurricane 8 throttle body intake manifold making about 700 HP. It is running a speed density tune. It was running fine after many many hours of modifications to the tune to get the car dialed in. Then it started backfiring and or hesitating on acceleration, then it started missing, then dying under hard acceleration, Now it is missing and dying under light acceleration and it is almost not drivable. There are no codes other than a MAF code which it has always had but does not set the light. During this time from running good to not running good I have changed nothing in the tune just been trying to trouble shoot it. The problem was intermittent and at times it would run fine now it is all the time. It shuts off, I loose all communications with the computer, it will only restart after I turn it off and restart it.
I have replaced spark plugs, injectors, crank sensor, o2 sensors and now the computer. I have tried multiple troubleshooting ideas and nothing seems to work. Does anyone have any new ideas?