Hi im new to this forum and needing some help. I have a 94 chevy silverado with a 454 swap. Recently i broke my timing chain and luckly I didnt break anything. Put new chain and gears in it ran fine for a few days, then started having timing issuse. I set my timing to two degrees advanced and stop having problems. Then a day later on my way to work i started to loose power. Rebuilt the TBI unit and set my timing again. Ran great then few days later left for lunch and truck wouldnt start. I know i have spark and fuel because the truck will try to run. Adjusted the timing again and now i cant get it to start, any ideas?