My injectors are firing on vems ??

[ian4455]

Still can't start my car on vems, i've plugged a voltmeter into the two injector pins and switched the output on but nothing, no voltage.

[Kieron20V]

Is it ground missing or +12v? good start.

[ian4455]

Is it ground missing or +12v? good start.

Testing on injector number 1 blue/black wire is down to earth or battery 0Volts all the time, the other brown injector wire is switched to earth / 0 volts when i set output on.

I've a 3b with a pin swap by the way.

Guess i missing the 12V + ????

[Val]

Guess i missing the 12V + ????

Vems is just switching ground on/off. Injectors should have +12v all the time while ignition is on or fuel pump relay is "on" - don't know how you wired them. Take a multimeter and check it

[ian4455]

My fuel pump relay works ok on vems as it primes for 2 seconds when the ignition is on. I need to know where the +12V comes from that supplies the injectors, fuse 28 but thats ok ?

Its getting a bit cold outside to fault find !!!

J17 is the fuel pump relay to provide power to fuse 28, if this is set to only prime for 2 seconds in the vems settings then won't this switch of the supply to fuse 28 ?

[Val]

Did you checked voltage while cranking?

[ian4455]

Ok i get 10.5 Volts while cranking, so guess thats ok.

Coil Packs are firing also but still won't start !