Customer calls me and so of course, I come out.
The car has a Gen IV 6.2 engine that has supposedly been stroked to a 7.0L. It idles rough and when at temp the driver side of the engine makes a hard "Thud", "Ping" , "Gas belch". I hate to say knock but it's definitely reminiscent of one. When it happens, the knock sensors go wild and pull timing. the engine falls on its face and runs worse, then it will catch a good idle and anywhere from 30-60 seconds later, the hard thud happens again on the driver side and the issue repeats.
The car has an aftermarket 255 LPH fuel pump and fuel regulator setup. The corvette style. I of course, set the injector vs. pressure table to be 42lbs all the way across because it has LS3/LS7 injectors installed, a fast 102mm intake and no FSCM. I disabled the fscm in the tune as well.
The issue I'm explaining only happens when it is warmed up. I am stumped, not your typical tuning issue.
The odd thing is , it seems to idle fine during warmup but once at temp the thudding begins. It more than likely happens during warmup as well, but it's not terrible.
The car has a rowdy camshaft and I'm stumped boys, below I am going to attach the tune file and also the log of it warming up (seemingly okay) and then a log of it hot and acting up.
I coould really use some helpful insight, this definitely is'nt your run of the mill issue and it definitely isn't your typical Ls powered vehicle.
Thank you guys for taking the time to read this.