97TurboLude

Hey, please help me again guys, my turbo project went sour along time ago and now i am back to N/A with i,h,e, and i also still have 9:6 compression with 450cc injectors. My question is that my car has been running fine N/A with the lowered compression and big injectors but out of no where, the car takes a while to start up like its flooded with fuel, and once it does start, the exhaust pops or backfires a little. I have to rev it up a couple of times before the idle is normal. The idle sounds like a muscle car and it shakes the whole car.

My friend said that its one of my injectors going bad but i just want to see you what you guys think.