HELP!! Having problem with my LS7 engine
Did all still the same, crank but couldnt fire up.
Finally, i change to an old ECM which was previous have fault which to my surprise, it might to fire up and got the engine running , sluggish and chocking but after 30 sec of running it dies down. continue to fire up which it could but dies down.
Any1 of you guys have the same problem as me?
I need help!
Any comments is welcome.

