You won't believe how I stopped the ding ding miss on number one.

[ruxall]

VE2 3.6 Replaced coils and plugs, still getting the ding ding ECU shutting off No1 injector. Set up a hose on the vacuum line right at the front top drivers side,throttle body, and put a restrictor on the hose. Set speed with a brick at around 1500rpm, and with approx 125mill of water, let the engine ingest that at a rate that wouldn't stall, did it twice on seperate days. No more miss light, and doing a litre per hundred better on fuel. Yes, tried all those CRC type upper cylinder cleaners, and found nothing cleans off carbon better than steam. Changed the oil a couple of weeks later, no sign in that, don't overdose or it will trip an emission code.