ever get this solved??? I cannot get my truck to quickly fire up after it sits for ~45 min to almost 2 hours later. It will crank for a few seconds consistently before it slowly comes to life.

**noticed you on hptuners forum also.

 

Since I started this thread, my set up is completely different. But with my old 408, the issue persisted until I pulled the engine. That can just didn't like hot starts for some reason. I did get it really close to firing every time but it was never perfect.

I have a 4.8L in my truck now with a tiny cam and it fires first piston up every time.

 

NP had done my tuning and would never start after it got hot...i decided to buy HPTuner and do 2bar os upgrade and went from there no issues with hot start or surge...tune is in the refinement stage