Råda
Volvoretard/Partshoarder
- Joined
- Jan 6, 2010
- Location
- Örebro, Sweden
I have a 1991 B6304 in my 740 complete with the Motronic 1.8 ECU and AW30-40.
It ran fine for two years and then after it sat for a few years it won't start.
It's firing on all 6 when spraying motor starter in the intake
It seems as the injectors won't open. I have +12 on the injectors so the relay is working.
I tried to measure on the injector connector if the ecu grounds the injectors when cranking.
It seems like it won't ground them.
Any idea what makes the ecu ground them?
Cam or crank position sensor?
I've tried a known good ECU
Made sure the ECU has ground
I have fuel pressure in the fuel rail
It ran fine for two years and then after it sat for a few years it won't start.
It's firing on all 6 when spraying motor starter in the intake
It seems as the injectors won't open. I have +12 on the injectors so the relay is working.
I tried to measure on the injector connector if the ecu grounds the injectors when cranking.
It seems like it won't ground them.
Any idea what makes the ecu ground them?
Cam or crank position sensor?
I've tried a known good ECU
Made sure the ECU has ground
I have fuel pressure in the fuel rail