Had another play with airfix 1. Fully charged battery. Jump lead from battery negative to block - no change. Still showing p0201 as opposed to the previous p0204.
Swapped injectors from pot 1 and 4 over. Still shows p0201.
I think the thing to do now is to splash out £35 on a Renault-COM Bluetooth all the way from Manchester China and hope for the best.
I seriously doubt a wiring problem as it hasn't been disturbed at all, so now having thoughts of fried ECU.
I read today that Cherie Blair was on the board of Renault the same time as the bloke who arrived in Beirut in an instrument case the other day.
Had the seller of the Renault provided me with this info at the time, I would have run a mile. Might see a solicitor about this terrible lack of disclosure.
have you tired using a low watt 12v bulb as a noid light to test the wiring ? and checked loom plugs and continuity
example clicky
Might yet have to try that, but I have actually made some progress. I revisited my work and repeated it - bled injectors, checked connectors to injectors, earth connections etc and one thing I hadn't done before. I unplugged the ECU plugs and gave them a squirt of contact cleaner. It then started straight away, although was running a little rough, especially it low revs. No fault codes present or pending. I thought it might just need the replacement injector coded in.
Took it for a drive up the road but it isn't right. Feels like its running on three pots, but its a definite step forward.
Plugged the code reader in again and got P0263. Cylinder 1 contribution balance. Havent heard of that one before, but it seems its telling me cylinder one isn't firing, or isn't running properly. There can be many possible causes of this Im surprised it wasn't accompanied by an injector code, but there we are.
Still cant work out why its all cylinder 1 related now, when the original problem was with cylinder 4 injector, which has now been replaced.