here is wat happen i rebuild me engine put it in the car first i had a lower injector stuck leaking gas in the engine ,then on day i went to start the engine car start good run for 10 minutes shut her off after an hour went to start her again i just put the igition on loud boom came from the engine bend the butterfly on the trottle body to a L shape i took the trottle body out and fix the butterfly ,now i replace the stuck injector car start good idle nice thinking the explosion problem went away cause i fix the stuck injector well yesterday i start the car idle good rev good after 30 minutes i shut her off after another 30 minutes i went to start he i just put the igition then a loud boom came from the engine again bend the butterfly again
anyone know why i am having these explosion thanks


cosmo 13b 2 bribge
microtech ltx8

 

I've had that happen before like a backfire as soon as I turn the ignition on never bent butterfly's though. I
thinks it's fuel in the chamber though maybe it gets ignited and the backfire pops.

 

obviously you are still getting fuel leaking into the engine while it is parked..