last night a friend was driving my car, I was following him he took off and about half a mile down the road I saw sparks and flames w/ black smoke coming out the exhaust. Afterwards the car would not start so we pulled it home. Then I got in the car and it started right up, idle alreight but then when I gave it gas it backfired and would not start back up. My current set up is B18b w/ Jackson Racing @ 7psi, boltons, crane ignition, check valves, 91 octane @ 6000ft elevation. I plan on doing a compression test, but just htought I would ask the opinion here first. Thanks

 

PLUGS or Wires.