this customer had a crank no start condition. first checks spark has good spark.
spray brake clean in the throttle body and engine runs.
being new to LP i was cautious and inspected the fuel system. the regulator has two electronic solenoids. the large solenoid has no power. found the relay for the solenoid was damaged (diode was cracked) jumped the relay to check operation and i can smell gas but still no start. if i manually pulse the power while cranking i can get the engine to run. i do have to pulse for a short time after the engine runs and then i can hold down power and the engine runs well. the service information i am able to find is not very good. i do know the fuel solenoid relay gets its ground from the engine control module but cannot find if its duty cycle (pwm) controlled or not. there was a lot of wiring problems with this unit Aswell at the ecm and the throttle body. so im not sure if there is another problem or if i need a new ecm. shoppas quoted over $6k for a ecm.
so i want to be certain this is the only part i need.