I know this car, and the owner. The engine is an L36, a better question is what's been done so far? I know there's been a bunch of stuff tried so far, but I can't remember what.
Matt and Nas suggested fuel injector problems in the intro thread but it seems fishy that 6 of them would have heat soak problems.
I'm thinking Crank Sensor or maybe an ICM, I should have L36 injectors if you want to try them.