I had pretty much the same issues with the mk2, idled perfect but as soon as it was under load the engine would either die or struggle hard to stay on. Turned out to be when I got the immobiliser taken out the auto electrician moved my negative lead into the worst earthing position on the clutch lever so everytime I used the clutch BAM no earth, so I would suggest checking your earthing.
If thats all fine I got nothing...
85' MKII GOLF GTI - GTI 85T - First cruise was 4000km in 2.5 days. It's Evolving!
06' MkV JETTA TDI - Stock To Shock
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