Silicongyro

I have a 3 burner SMEV unit and have experienced a similar effect on one burner, from time to time. In a similar manner to Colin above, I "wiggle" the thermocouple protuding through the stainless steel hob surface plate and try to more firmly seat it into the hole - all from below the hob. This always works for a time and I suspect it is the thermocouple body needing a current return via the hob plate and developing poor contact over time.

Well I'll add my two penneth ! I also have a folding pair of bikes - Prorider bought 11 years ago and both still going well - albeit now with replacement batteries to replace the worn out originals ( 5 years plus in use every week) These bikes have semi universal 36v battery packs originally specified at 10 Ah which slide down the frame and an integrated plug mates with a socket on the bike frame at the base. Now the battery plug only has two outlet pins (ie just 36v nominal, so no further sensing outputs) and yet the display on the handlebar provides remaining capacity on a row of LEDs. So the capacity/remaining range is just calculated from battery voltage present. Also I bought these from a seller ( Chinese ?) on the Chinese "ebay" AliExpress via stock in Germany at half the price of ProRider and other UK Bike suppliers . But the main thing was these were increased capacity at 15Ah. I appreciate scepticism may creep in here, but the range we obtained, and still always obtain far exceeds that of the original batteries. So if your bike, and its motor controller is anything like mine, my experience shows other nominal 36v batteries will be fine - including greater capacity.

Like Tracker, I also fitted a tuning box to my 2004 Laika Kreos 3010g( - has a 2.8 JTD engine ) in 2005. This was a Van Aiken box which came with a lead assembly to intercept the injector wiring and provide more injector pulses as determined by the box electronics. This company is no longer in business. The box works very well - still in use as is my Laika motorhome. It improved the top gear pulling power to save me changing down on any slight incline on motorway travel. A real boon during my Swiss and German trips. Being a box it can readily be disconnected - which I due for the annual MoT as a precaution in case the extra boost puts me over the smoke limit on the full throttle smoke test ! The engine is also smoother. So no regrets from me - and would fit another box if I used another similar vehicle