Car was running great at steady 750+ idle for about 5min, then all the sudden it turned off, (literally as if an invisible man turn the key off). No stalling or hesitations at that second were heard. So i though wtf? went to try to start again but no sound, key fully on start, only thing i hear is psshing sound from fuel pressure i think and some relays click. Security light is not on, and when hooked up to a scanner with key ON, scanner communicates w/ECU showing life data but no codes. PLEASE HELP WITH ANY ADVISE!!!!!!
THANK YOU!
this is what the cars current state is: 1997 Buick Regal GS. Have a 1999 GS engine and transmission along with its engine wiring and lightning wiring, the only wiring that is of 1997 is one that comes from a firewall into a fuse box next to a motor, rest of those two packs of connectors from 1999. It also have 1997 ECU (computer). 1999 ECU will not work because it will not identify security signal from the keys transponder that programmed for 1997.

You already have a thread going in the Regal section. Please refrain from cross forum posting. It will just cause confusion. Thank you.
Thread Closed.