You can get stuff to decoke two stroke boat motors, it's in a aresol can you just empty it into the carbies and run it for 15 minutes, gets very smokey for a while. Don't know if it would work on a car but if it's that bad i can't see it hurting .

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https://t.me/pump_upp

could be just a matter of changing the octain of fuel.
My wife has relaised that if she puts in 98 instead of 91 her drive does not ran on. Try it and see what happens

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Stop Licking the Dog...I Don't Care Who Started It

given my limited (nil - you all probably now know less for reading this) mechanical knowledge, i think i'll try the higher octane fuel first as i know how to and it's come up a few times...

Changing to high octane will require and Italian tune up to get rid of the current build up of crap.

& like i`ve said,,, lower the idle & you`ll be amazed at how it doesn`t run-on anymore

serious

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No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.

It should still be ticking over around 800 - 900 rpm and didn't run on........If you need some assistance give me a call and we shall get it sorted.

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http://www.youtube.com/watch?v=nDMkVq1jRGU

first time it happened was on the day i picked it up off you

Has it been living on a diet of Premium fuel?
The timing was set where it should be, the rocker clearances are right and now its getting the right amount of fuel into the cylinders.........
Does it do it everytime?
Maybe i should have driven it hard to get rid of the build up in the cylinders

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http://www.youtube.com/watch?v=nDMkVq1jRGU

yeah, always premium fuel, and yes, it is pretty much every time.
haha, maybe you should have!

Seeing you've got such great pre-ignition there, maybe you could switch to diesel and improve your mileage

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1967 Cooper S - new front bearings to do.
1965 Cooper S shell - Slow progress. No time or money!
1966 Deluxe- next rustoration!
Mk 2 & XJ6 Jags. Less said the better.

tried out a higher octane fuel option. put in some shell v-power on the weekend, and it definitely seems to have helped. it's still happening sometimes, but a lot less.

i am a massive, massive n00b. is this something relatively simple??

throttle adjusting screw is generally on the top when looking down next to the piston chamber. what carb do you have? might be worth actually giving your carb/carbs an adjustment, dont know what setup you have but heres a basic tuning guide for twin su's http://www.oldclassiccar.co.uk/balancecarbs.htm it can be more involved than this but its a straight forward guide. it'll be easier if you have a single carb. try a search