I'm opening up the ECU tonight to check the resistor.. wherever it may be hiding
I'm getting error 21 (ignition signal) and 22 (fuel pump). I get error 22 before I even start the car, I think it's because of the way the walbro is wired up. Not sure what the best checks are for error 21..
I fitted brand new Magnecor KV85, it run smooth as a peach until it got hot, then it started missing gently, but it was more of a constant gentle miss - which is good in my eyes, more obvious to sort I hope.
Now to top it off, I always figured missing below 3k was down to a dodgy o2 sensor - so I check mine.. well it's not likely to work very well given its been replaced with a blanking plug!