Hi there, sorry about the caps in the title.... but I'm at a loss here.

83 Camaro 5.0 sat for 10-14 years.

changed the following
fuel pump and sock filter
fuel filter
HEI
ECM

had it running two days ago with both injectors firing though it was idling very low than high... low than high.

have 12-13 PSI in fuel lines at start up and maintains that pressure.

Now front injector wont fire (though it clicks) and car wont start.

Upon turning over there will be a blowback out of throttle body of rear injeector and sometimes catch fire

any advice would be greatly appreciated..... I'm at a loss.

thank you