I took a 2015 lfx camero short block engine and put in 2011 camero. I changed heads and oil pan all accessories to 2011. I know 2015 has differt crank. I also know it changes compression with the different pistols. It starts and runs but after it warms up it runs like shit. I try to restart it cranks very slow like it is out of time. I do not have hptuners I was wondering if I can use hptuners to fix the problem. Everyone I talk to say u can not do this. It run fine untill it warms up. Please any ideals