mk3 golf 1.4cl cuts out at speed

[nev1113]

My mk3 golf 1.4 (ABD) has a very annoying intermitent fault. It generally starts and runs fine and then, when warm, it will either try to cut out or completely cut out, more often or not when doing a fair speed ie top gear 50+.

This is very abrupt ie engine cuts out, rev counter drops to zero and oil light comes on. Generally it happens for about a second and then just picks up again. Sometimes it grinds to a halt and wont start but then has always fixed itself after about 10 minutes

I'm sure its electrical, not fuel due to the sudden nature of the engine failure. I have recently replaced plugs, leads, distributor cap.

Any ideas?

Thanks