fueling

[Craigwilson]

there is 2 wires behind my centre consol area think there yellow and blue/grey and there just blank and tied together, could that be what there for, I'll have another look at the car tommorow after work.

[Craigwilson]

also what's classed as a runout model

[clipperjay]

Runout models are the last MK2 to roll out of production, but like I said its just a two pin plug and I've only seen them in Corrados and G60's some in handbrake area some in the steering cowling. IMO the MK3's was the start of ODB, but the Late MK2's especially US market had some fitted to make a transition and test purposes of diagnostics better.   
There are various diagnostic plugs that read OBD ports, but its not really going to help you without software.
You could ring around a Bosch specialist to see if they still have that kind of equipment, but the interface is pretty basic all they will do is stick an interface between ECU and loom and read off the ECU Eprom unit. Don't forget its over 20 years old ECU system. I had this checked out when I had a rolling road mapp done, so the interface had to record a base mapp of the original Eprom chip before the new chip went in. Even then it was basic O2/fuel sensor flows readouts.   

I would concentrate looking for grounds and earths and swapping them out!

[gazareth]

have you done the screwdriver test on your fuel injectors to check if they are clicking? you mentioned trying to start the car when an earth cable was broken. that's a very common cause of ecu failure.

[Mr Blue]

Have you checked for a good spark? Swapped the coil just to rule that out?

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If not that I would then try/swap the ignition mod that sits ontop of the ECU.

[Craigwilson]

have you done the screwdriver test on your fuel injectors to check if they are clicking? you mentioned trying to start the car when an earth cable was broken. that's a very common cause of ecu failure.

this all happened a while back that was when I replaced my earths, and it's been fine since, and I checked the injectors worked before I fitted them

[gazareth]

you really need to get your fuel pressure checked first. if its to high it will flood engine and if its to low the injectors will only be dripping which will also soak the plugs. pressure should be 3 bar with regulator vac pipe disconnected.

[clipperjay]

I was hoping you would pick up the fact the other working 8Ver might have only two sensor faults and runs okay with only two?
This said your broken one might have three or more issues which would mean when swapping parts out from one car to another makes no difference! This is important. Hence I've only used a donor parts that I know are defo working to spec.
Is there a decent earth strap from the coil body to bulk head this made some Digi run like poo without a decent braided earth strap i.e made a bad spark!

[Craigwilson]

my car is now in someone else's hands I'll be sure to keep you up dated

[gazareth]

I think them small earth straps were fitted as a safety feature. so if your main earth cable decides to break when your flying along at 100mph in the fast lane your engine wont die on you. I found my car ran fine without that small earth strap.