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rulloyd

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  1. Like
    rulloyd reacted to PeteH in Weird non starting problem GT6   
    Looking at the GT6 wiring Diagram(s). It would appear that the 12V supply is via the ign; switch on the Mk1 and 2, and only the Mk3 is direct from the Solenoid, and not via the ignition switch?.
    I had forgotten that Haynes lump(ed) the GT6 and Vitesse in the the one W/S manual. I never let go of W/S manuals!. I think I have around 50!.
    Pete
  2. Like
    rulloyd reacted to NonMember in Weird non starting problem GT6   
    Err... no. Yes, the inrush current is huge, but it's being supplied by a car battery with a massive CCA rating. The voltage does not drop "briefly" (or even instantaneously) to zero as your description implies. Indeed, if the battery is so weak as to allow that to happen, the starter just stops. Current does not "choose the shortest path" exclusively, as some pub "experts" might tell - it follows all paths simultaneously in proportion to their conductance. Further, the coil is not sensitive to the instantaneous voltage but rather to the integrated voltage over the period it's turned on, clamped by its internal resistance towards the end of that period, which is approaching TDC with the engine rotating, and hence after the starter motor has spun up.
    What happens with a weak battery is that the steady voltage gets pulled down, not by some claimed "short circuit" but by the 80A or so that the starter motor draws in steady state. That doesn't in any way prevent the current flowing through the coil, but it does reduce it, which makes for a weak spark. If the ignition system is in good order, and especially if you have a working ballast bypass system, that may still be enough to start the engine fine.
  3. Like
    rulloyd reacted to thescrapman in Weird non starting problem GT6   
    The Piranhas / Newtronics seem to get dry joints on the pcb, also the big transistor plays up.
    I run 4 of them, 2 I purchased as "fully working" from Ebay and were nothing of the sort.
    The investigation revealed the dry joints, and swapping bits from a good one proved the transistor.
    All have been running 20+ years now without any further issue. 
  4. Like
    rulloyd reacted to Stratton Jimmer in Weird non starting problem GT6   
    It's worth mentioning that if your battery is struggling, any attempt to use the starter motor will sap its charge very quickly. Electricity likes to use the path of least resistance and hence you may not get the necesssary 12 volts at the ignition system. This is a common fault with Japanese motorcycles - starter motor runs well enough but no ignition.
  5. Like
    rulloyd reacted to NonMember in Weird non starting problem GT6   
    I'd say the most likely candidate is the electronic ignition pickup - sensitive electronics that might well have been hotter just at that moment than normal. Next candidate would be the coil. If you had waxstat carbs, as Mathew said, they would also be a suspect. Or possibly a weak fuel pump, which might have vapour-locked then drawn liquid fuel back in as it cooled.
  6. Like
    rulloyd reacted to dougbgt6 in Weird non starting problem GT6   
    Rich,
    I've had sludge in the fuel line, rubber slivers and a rogue fibre washer floating about and occasionally blocking the tank outlet. However all these caused rough running before engine death. In this case I would suspect something electrical, loose wire, dodgy connector or electronic ignition. Do you have a biased ignition system? Last year I had to replace my ignition switch because it wouldn't connect the 6v on start up. 
    Doug
  7. Like
    rulloyd reacted to Mathew in Weird non starting problem GT6   
    Are you running slightly lean? When you stopped the heat warmed the carbs and leaned it a bit more, after a rest it cooled a bit and allowed to start? Only mention it as it happened to my spitfire many years ago when we switched from leaded to unleaded, although it was due to the waxstats on the su's which would not affect you. Can we blame e10? I know last fill up my pumaspit had difficulty starting when i switched from standard to super unleaded, but with the same fuel is ok now,, probably adjusted itself!
  8. Like
    rulloyd reacted to chrishawley in Weird non starting problem GT6   
    I'm supposing there will be a wealth of experience to advise you on this so I'll just stick to factors which I've experienced first hand: For 'die then recover' I've had:
    * Fuel tank shedding detritus enough to partially obstruct the forward fuel line. The tank had been refurbed but shed an atrocious amount of crud after it's first fill.
    • Obstructed needle valves in one or both carbs - general filth +/- flakes of rubber from fuel lines
    • Obstruction of the interconnecting pipe between the carbs
    • Carb flooding due worn needle valves (not returning) or poorly fitted sealing washer between NV and carb body (leaking)
    • Intermittent loose/poor electrical connections almost anywhere from battery through to distributor.
    • Impending failure of electronic ignition unit (Accuspark) - intermittent problems first, follwed by complete failure.
    I guess there are many other possibilities beyond my knowledge but those are ones I've dealt with first hand. Hope that helps with thinking about the problem.
  9. Like
    rulloyd reacted to NonMember in Weird non starting problem GT6   
    Kevin may have a point - my GT6 has been known to behave as if nothing's happening at all when the choke's on and shouldn't be. However, after a five minute stop you presumably didn't pull the choke out. Given the description of the day's trips, it sounds like a heat soak problem. If it keeps happening then I'd be suspicious of the electronic ignition. What type is it?
  10. Like
    rulloyd reacted to DanMi in Weird non starting problem GT6   
    depending on how long it stood before restoration, could be rust/varnish come off the inside of the tank blocking the fuel line.
  11. Like
    rulloyd reacted to KevinR in Weird non starting problem GT6   
    Choke stuck on ?
  12. Thanks
    rulloyd reacted to Stratton Jimmer in Weird non starting problem GT6   
    When a starter motor commences to spin, it takes a huge amount of current as it is effectively a short circuit - copper windings with very low resistance. As it speeds up, a back electromotive force (back emf) is generated which resists the flow of current else the motor would accelerate indefinitely. At some point, the back emf is sufficient to allow current from the battery (and generator) to flow elsewhere and power up the ignition circuit. If all is in order, this happens very quickly but if there's a problem anywhere e.g. a poorly charged battery or a sluggish starter motor then there will be less charge available for the ignition system.
    What may happen with sluggishly turning starter motors is that they may hesitate with their commutator in such a postion that momentarily, the short circuit they are creating is switched off. This is sometimes sufficient time for the ignition system to generate a spark and start the four stroke cycle. That will also initially accelerate the starter motor before the starter dog drops out and enhance the back emf and thus current available for the ignition circuit.
  13. Like
    rulloyd got a reaction from Qu1ckn1ck in Classical dash - GT6 dashboard   
    Well pleased with the new dash I received today from Classical Dash.  Highly recommended.
    I see they have some bad press on the web.  Their products are excellent (or my dash is anyway) - it's their business skills that are shyte and lead to customer concern.   Ian Bond who runs the company is chronically poor at answering email or the phone or returning calls which makes for a fraught transaction.
    Don't let that put you off.  It's his company that supplies Rimmers et al (he tells me!) and my dash was £65 cheaper direct from him than from Rimmers.
    I did try to veneer my original dash myself btw, which is another story I will relay sometime.  Overall my advice would be if you are handy and you like a project, go ahead - but for me I was never happy so changed tack and bought one from a professional.  I am handy and a perfectionist.  The trouble is you learn as you go along and it's very easy to chip the veneer around the tiny gaps between guages / switches (1st effort).  If it is a GT6 you have the 3 sections to contend with, making it important to align the sections to ensure grain consistency (the sections themselves don't directly align as the centre section is narrower than the 2 sides (2nd effort).  Also I see all types of veneers, laquers and varnishes being used - but it's very important to get it right as it won't last.  I veneered it twice and although they looked very good to everone else, I was never really happy and it took a lot of effort.  In the end bought one and looking at it I doubt many non professionals could match the quality.  Pictures below don't do it justice.
    Just my view.  I know many people are very happy with their creations!
    Incidently, the colour of the new dash certainly doesn't match my old one.  Clasical Dash had warned me that I may be surprised.  They say this is the original colour, using the same techniques - and will naturally fade over time.  But I only have their word for that!
    Rich



  14. Like
    rulloyd got a reaction from Qu1ckn1ck in My GT6 Mk2 - on the Road!!!   
    Yaaay.  My car 99.9% finished.  Been out driving for the first time in nearly 20 years.  37 years of ownership, literally my baby!  You can imaging the ear to ear smile on my face  😁   Absolutely loving it, driving really well - better than I remember!     Thanks so much to my good mate Pete Dunne (AKA Jade Muttley) who took a completely knackered GT6 shell a brought it back to as good as new.  Although I pride myself in having rebuilt the car twice before myself, my standard was 100% off his, hence the ground up rebuild.  Some of you may have followed the rebuild on youtube.
    This build has included a chassis replacement, engine recondition and a LOT of new parts.  The car now has leather seats (recovered by an upholsterer mate).  I also covered the dash pad in leather and most other vinyl parts including the rear panels (which all looks and smells amazing).  My beautiful little car looks absolutely stunning and drives amazingly.  I AM SO HAPPY for me AND my Car!!!
    Thanks to all the advice the forum have given me - all very valuable and highly appreciated.  I still have a few jobs to do but none too important.  THANK YOU!
    BTW, the SAH rocket cover I bought new 30 years ago.  The rear seat I extracted from a Triumph breakers also around 30 years ago. Good investments in hindsight!
    Rich
    Some pics.






  15. Like
    rulloyd got a reaction from Colin Lindsay in My GT6 Mk2 - on the Road!!!   
    Thanks for all the great comments.  Still smiling 😁
  16. Like
    rulloyd got a reaction from Badwolf in My GT6 Mk2 - on the Road!!!   
    Thanks, yes we have a fridge /Freezer in the Garage.  Can’t help but chuckle to myself every time I go out there 😂😂. I really can’t believe it!!
  17. Like
    rulloyd reacted to poppyman in My GT6 Mk2 - on the Road!!!   
    What a great looking car Rich, i bet your face hurts from the constant grin  
    Tony.
  18. Like
    rulloyd reacted to Badwolf in My GT6 Mk2 - on the Road!!!   
    Extremely jealous Rich. I am having trouble even getting mine ready for a set of agreed valuation certificate photos. I am lacking a certain enthusiasm...must be the lockdown. Full marks to you
  19. Like
    rulloyd reacted to Mark B in My GT6 Mk2 - on the Road!!!   
    Looks Great!
  20. Like
    rulloyd reacted to dougbgt6 in My GT6 Mk2 - on the Road!!!   
    Lovely, well done!
    Doug
  21. Like
    rulloyd got a reaction from poppyman in My GT6 Mk2 - on the Road!!!   
    Yaaay.  My car 99.9% finished.  Been out driving for the first time in nearly 20 years.  37 years of ownership, literally my baby!  You can imaging the ear to ear smile on my face  😁   Absolutely loving it, driving really well - better than I remember!     Thanks so much to my good mate Pete Dunne (AKA Jade Muttley) who took a completely knackered GT6 shell a brought it back to as good as new.  Although I pride myself in having rebuilt the car twice before myself, my standard was 100% off his, hence the ground up rebuild.  Some of you may have followed the rebuild on youtube.
    This build has included a chassis replacement, engine recondition and a LOT of new parts.  The car now has leather seats (recovered by an upholsterer mate).  I also covered the dash pad in leather and most other vinyl parts including the rear panels (which all looks and smells amazing).  My beautiful little car looks absolutely stunning and drives amazingly.  I AM SO HAPPY for me AND my Car!!!
    Thanks to all the advice the forum have given me - all very valuable and highly appreciated.  I still have a few jobs to do but none too important.  THANK YOU!
    BTW, the SAH rocket cover I bought new 30 years ago.  The rear seat I extracted from a Triumph breakers also around 30 years ago. Good investments in hindsight!
    Rich
    Some pics.






  22. Like
    rulloyd reacted to Radiation Man in My GT6 Mk2 - on the Road!!!   
    Very nice looking car indeed.
  23. Like
    rulloyd reacted to Paulfc in My GT6 Mk2 - on the Road!!!   
    Green with envy, Richard, but spurred on to get mine sorted. Looks absolutely great!
  24. Like
    rulloyd reacted to Brooky in My GT6 Mk2 - on the Road!!!   
    Very nice mate enjoy
  25. Like
    rulloyd reacted to Qu1ckn1ck in My GT6 Mk2 - on the Road!!!   
    She looks beautiful !
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