Injector wiring/signal fault

[marT350T]

As above, yesterday whilst racing my polo with a 1.8 20v t motor I cam accross a injector fault. the 2 middle injectors are getting a signal to be constanly open whenever the ignition is turned on so there for they are putting 4 bar plus of fuel striaght into the cylinder. any ideas ?

It is on emerald management.

Thanks

[Mr2Mike]

Either a the injector wiring has chaffed on something and is grounding those injectors, or the ECU has a blown (shorted) injector driver.

[rev-erend]

The injectors work by providing a ground for the positive feed..

So perhaps you have as someone suggested an earth fault with a chaffed wire..

[marT350T]

thanks for the replies I shall have a look at the wiring tomorrow

[stevieturbo]

Dont forget to pull the plugs and make sure you get all that petrol out.

Might be worth changing the oil too, in case it has got saturated with petrol.

[rev-erend]

I presume it's running on semi sequential - so 1 controller controls 2 injectors.

Could also be a fault with the controller... you could swap the cabling of the 2 sets of injectors at the ecu end .. to see if its the wiring or the controllers.

[marT350T]

Sent back my ecu to emerald and they have cofirmed that one of the injrctor drivers had gone. Excellent service by Emerald as they have rectified the fault and put the updated 2009 software on and they have phoned to say that the ecu will be back with me tomorrow

[stevieturbo]

You'd need to find out why the injector driver fried before re-fitting the ecu in case it happens again.