I have a 1993 stock SC300 that I have lost two engines due to cylinders filling with fuel.

I purchased the car with a blown head gasket and had it replaced...Vehicle would not crank after repairs.
Discovered number two and three cylinders and intake runners full of fuel.

Installed a used motor and drove vehicle 78 miles...Vehicle died and would not restart.
Found number five and six cylinder along with intake runner full of fuel.
I did not re-use any injectors or the fuel regulator from the first engine so I have ruled out that problem.
I also did a 12 volt conversion after I lost the first engine to bypass the fuel pump ecu.

I am suspecting I have a bad ECM. Is this correct?

 

most likely a bad ecu. usually when they go bad they leave the injectors running wide open.

if you want to, take the ecu out, open it up and look for busted/leaking capacitors. if there are any visible then thats the culprit.

 

im with ^ on saying check ecu. are you throwing any codes also/running rich etc?

 

Thanks...I will check the ecu.