Won’t start backfires

[RobertWhalen]

I have a 2003 GTX SC it was running fine when I shut it off! On restart a couple minutes later it turned over hard and then backfired very loud! Now cranks and backfires won’t start, upon trying to figure it out I noticed number on ignition coil fires approximately 25 percent of the time , number 2 50 percent, and number 3 seems to fire normally!

 

[ski-d00]

Check your fuel injectors for proper flow while cranking. ECU controls the timing and fuel injection.