2011 GTM supercharger Nismo forged engine build

fryzia23

So drive over 125 miles total so far and encountered small issues. After installing radium surge tank I can’t get the fuel level gauge to read properly. Since I always had funky fuel level readings I decided just to order new sensors but still nothing. It shows no fuel in the tank. I have to go back in there and do ohm readings and see what’s wrong. Another issue I have which I didn’t notice until I decided to drive the car, shut it off and then restart when hot. I would usually take the car out of the garage, drive it for 20miles and then park it back and recheck. Never restarted it right after. Few days ago I took it out then drove it for 10mins and shut it off. 5 mines later slow crank(did have weak battery) but even with a jumper it had real hard time starting. At 3rd or 4 th try I decided to give some gas and it fired up. It happens every time when I try to start it right after driving when it’s hot. Cold start are very much normal. Replaced the battery with new antigravity which was on my list anyways. Tested it again for hot start, same thing, slower crank and no start until added the throttle then starts. Decided to change the starter thinking when heat soaked could be causing hard starting. Fast forward, with new starter the hot start issues continue but this time the engine turns much faster with new starter so I think it was on its way out anyways. Since I’m running only base tune, my diagnosis it must be the tune, running very rich causing hard start. At least that’s what I’m hoping it is.