16matthew43 Posted January 23, 2020 Report Share Posted January 23, 2020 Hi this is my first post, I have a 1971 TR6 totally standard have owned for 39 years, over the past few months, when you turn the ignition off, the engine runs on for a few seconds, has anyone else had this issue? Quote Link to post Share on other sites
ntc Posted January 23, 2020 Report Share Posted January 23, 2020 Only when hot? Quote Link to post Share on other sites
RogerH Posted January 23, 2020 Report Share Posted January 23, 2020 Hi Mathew, welcome to the forum. This running on can happen. Causes and solution not always obvious.. Is your tickover higher than normal. Have you changed your fuel. Shell and most f the 'Super' works OK. Simple fix is to leave in gear when parking and gently lift the clutch as you switch the ignition off. Roger Quote Link to post Share on other sites
john.r.davies Posted January 23, 2020 Report Share Posted January 23, 2020 Peter, welcome! "Running on" is a common problem with T6s, so much so that Triumph introduced an "Anti Run On Valve". The problem is related to too low octane fuel, carbonisation in the cylinders or even "dieseling", as worn rings and low pressure in the cylinders due to a closed throttle, allows engine oil to be drawn up. See this thread for a detailed discussion: https://www.tr-register.co.uk/forums/index.php?/topic/15396-anti-run-on-valve/ Quote Link to post Share on other sites
Peter Cobbold Posted January 23, 2020 Report Share Posted January 23, 2020 PI engines dont often run on as the fuel pump stops when the ig switch is turned off. Or is it on carbs ? Peter Quote Link to post Share on other sites
16matthew43 Posted January 23, 2020 Author Report Share Posted January 23, 2020 Thanks guys will check the idle, I keep trying to think what has changed, or what I have fitted! The only things I have done over last summer was replace the the oil switch and replace the pedestal oil seals, (it’s a PI unit not on carbs) Quote Link to post Share on other sites
Mike C Posted January 23, 2020 Report Share Posted January 23, 2020 If you've worked on the pedestal, make sure you haven't jammed the choke lever partially open. Running on can be caused by unburnt fuel vapourising in the inlet manifold when the throttles close- pulling a vacuum. Quote Link to post Share on other sites
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