Back again,

I've replaced the ICV/stepper motor today with the hope of the car not cutting out if I take my foot off the accelerator or just approaching a junction. No. It's still horrendous.
I've checked the throttle valve is OK, ICV OK, air intake system not blocked.

Only thing I can think of now is that the lightweight flywheel is causing me a problem or the hole in my exhaust is adding to a problem further up the system.

Have any of you managed to make this cutting out go away successfully with something other than a ICV?

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the zombie apocalypse started long ago, only no-one realised most can talk and drive

I've found that putting on the A/C has lifted the idle just enough to stop it.

If you've no A/C disconnect the compressor clutch and short out the gas pressure switch contacts. Press the A/C button and the idle should rise to 950

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S Reg Diablo standardsSpec SORNED
R Reg Nile standard spec written off then repaired
X Reg Astor in need of TLC
R Reg Nile to restore
Set of Lions to fit.

very simple fix dude.

start with a cold engine
1. disconnect your battery
2. leave 10 mins
3. reconnect your battery
4. start your car up
5. turn on everything electrical, lights, radio, fans(on cold), rear windscreen heater
6. wait for engine to warm up
7.when rad fan kicks in at 90degrees turn off engine
8. ecu reset complete

car will be fixed

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the world is changed by people in sheds

This...is a very good shout.

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"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone