Thank you guys for all the advice. Problem ended up being the lower intake manifold gasket. What's the problem ? Well, when you buy a stupid aftermarket head gasket set for 65 bucks off ebay, you end up getting an intake gasket that is NOT SHAPED at all around the injectors holes to allow injectors to sit in correctly. Its a straight line that covers almost quarter of that hole so you'd think injectors are seated well but they're not, and therefore I had a problem. I had to cut the gasket around the injectors holes and reinstall everything, it is fine now. Again, Thanks a lot.
