VP injectors not firing. Why?

[spbspb]

I have a VP 3.,8L that sat in mate's paddock for 3 years.
It was running when last parked.
Code is 12 System OK.
Security Key is in correct position.
Have also tried bypassing Security Key.
Have new fuel.
Have fuel pressure to the injectors.
Injectors look clean.
Open circuit / no short in injector loom.
Read 2-3 ohm resistance when all injectors plugged in.
Seems to me the injectors are not firing.
Tried swapping a couple ECUs with no difference.
Has spark.
Runs when I squirt fuel in the throttle body.

Any ideas?

 

[07GTS]

maby fuel in the injectors has turned to gum and blocked them ?

 

[spbspb]

maby fuel in the injectors has turned to gum and blocked them ?

What can I use to clean them? Or should I get the cleaned somewhere?

 

[07GTS]

if they are blocked because of old fuel then u either need a ultrasonic cleaner or get them properly cleaned and they usually flow them also to make sure they are good, if u have a noid light u can check to make sure they are getting the pulse

 

[spbspb]

It's definitely not switching to ground. There has to be a break of the gnd wire between the ECU and injector loom. Now, it also has an LPG setup. Could that be causing the break?

 

[07GTS]

the dont have a solid ground, they have power and the ecu grounds them to pulse them, if the lpg is cutting the injectors then if thats not set to petrol properly then that could be an issue

 

[spbspb]

the dont have a solid ground, they have power and the ecu grounds them to pulse them, if the lpg is cutting the injectors then if thats not set to petrol properly then that could be an issue

So LPG system cutting injectors pulsed gnd is a common configuration?

 

[gtrboyy]

How do you know it has fuel?

If it runs off aerostart then definitely fuel related issued.

Could be something to do with lpg setup or even dud f/pump sitting in crap ethanol fuel

Bypass wiring for f/pump to see what happens

 

[spbspb]

How do you know it has fuel?

If it runs off aerostart then definitely fuel related issued.

Could be something to do with lpg setup or even dud f/pump sitting in crap ethanol fuel

Bypass wiring for f/pump to see what happens

I know it has fuel pressure at the injectors. It has new fuel. But there's no pulse to gnd on the injector loom. And I know it's not the ECU as I've swapped out 3 times.

 

[07GTS]

as far as im aware when gas is used the injectors are stopped, alot of the time the fuel pump still runs and just cycles fuel so its ready for if its switched back to petrol, how its all done tho im not sure