Well after passing its mot a few days later my Z starts idling rough as if of a cylinder so after a few checks I think my front pasenger side (number 2) injector has failed after 28 years of spraying fuel. I did the screwdriver test and I can hear no pulsating tick from this injector so is that confirmed as my fault and if so where is the best place to get a new injector.. 

Did a vidio with the phone at the end of the screwdriver on number 1 cylinder then cylinder 2 hope its clear for you.

 

 

What about pulling the coil pack connector off and see if it makes a difference.

You've checked the injector resistance (good is between 10 and 14Ω), the connector and wiring for No 2? The W/R (white/green) wire from ECU pin 110 has

continuity to No 2 signal pin? +12v is present on the other pin? Check that the ECU connector is seated correctly.

Assuming that +12v is getting to the connector, you can see if the ECU itself is sending a signal to No 2 by putting a 12V LED across the unplugged injector connector

and starting the engine.  See if the LED flashes. This will help confirm a no signal situation to the injector (if you don't see the LED flash, try swapping the LED around in

case the LED's +12v and GND needs to be reversed).

Gary i just bought  a set from ebay,A guy in Aus sells old stock oem units for sensible money.I would follow Andrews guide before wading in though.

3 hours ago, jimmer said:

Gary i just bought  a set from ebay,A guy in Aus sells old stock oem units for sensible money.I would follow Andrews guide before wading in though.

Thanks Jim and do you have a link to him in case I need them? 

I concur with Andrew - before condemning the injector, have you checked the connectors?

I had a similar issue and it wasn't the injector, the pins on the connector plugs had become corroded. Jimmer cleaned them a couple of times - which cured the problem for a while - but in the end, I went for a replacement set of connectors. 

On 12/07/2021 at 20:11, RichardS said:

I concur with Andrew - before condemning the injector, have you checked the connectors?

I had a similar issue and it wasn't the injector, the pins on the connector plugs had become corroded. Jimmer cleaned them a couple of times - which cured the problem for a while - but in the end, I went for a replacement set of connectors. 

Running on 5 yesterday but fiddled with connectors and back on 6 again. But going to get new coil pack connectors and can you get new injector connectors?

From a UK source these look to be correct (with offset index slot):

https://www.fuelperformance.co.uk/index.php?route=product/product&path=367_685_808&product_id=5597

7 minutes ago, AndrewG said:

From a UK source these look to be correct (with offset index slot):

https://www.fuelperformance.co.uk/index.php?route=product/product&path=367_685_808&product_id=5597

Thanks Andrew they look correct.

Arrived today 🙂