HeebieGeebie Posted August 3, 2022 Author Report Share Posted August 3, 2022 So good news and bad news. First the good news, shes lives! Got the exhaust on after some manipulation and put everything back together including the freshly cleaned and reassembled carbs. It runs well and starts up straight away, previously it took a while to fire up, so that must be good news. I would like to get a professional to take a look though as i'm not 100% confident in my carb setup. I got them balanced as best i could using a flow meter. I also played around with the idle mixture screws until it idled nicely, but i did notice a bit of black smoke on a couple of occassions, i think it happened when i blipped the throttle. I think i'll also get a pro to check the timing.Now for the bad news, took it out for a drive on this beautiful evening, met my friend at the pub and took him out in it... and of course it was at this point i had my first break down - in the worst place as well - on an uphill bend on a national speed limit fast country road. First priority was to move to safety, my friend stood on the corner and warned traffic of my presence, 3 very kind people stopped to help push me to a safe place. I wish i could get all their numbers to buy them beer. Turns out i simply blew a fuse, but what caused it to blow i don't know. Seemed to happen on hard acceleration up the hill. It was the top of the 3 fuses (17A continuous / 35A blow) which services the fuel pump (hence breakdown, i ran out of fuel) and a few other things that i'm yet to determine. I think finding the cause of the blow is going to be a pain.Anyway thats the latest update from me! Link to comment Share on other sites More sharing options...
Stratton Jimmer Posted August 4, 2022 Report Share Posted August 4, 2022 Bad luck with the fuse but I have to say what a beautiful motor you have and those black and silver plates set it off nicely. I checked my fuses and they are simple 35 amp ones with no continuous rating given. Link to comment Share on other sites More sharing options...
Pete Lewis Posted August 4, 2022 Report Share Posted August 4, 2022 its unusual for ignition and fuel pumps to have a on a fused circuit i would seperate the pump feed out and if you want add a dedicated fuse in line what caused the blow can be a long job , tracing the why and where Pete Link to comment Share on other sites More sharing options...
Iain T Posted August 4, 2022 Report Share Posted August 4, 2022 8 minutes ago, Pete Lewis said: its unusual for ignition and fuel pumps to have a on a fused circuit Pete, I have my Huco supply piggy backed off a green after my fuse box. So what you're saying is piggy back off the white switched live pre fuse box and install an in-line fuse? I have to say it makes sense to isolate the pump fuse. Iain Link to comment Share on other sites More sharing options...
dougbgt6 Posted August 4, 2022 Report Share Posted August 4, 2022 The GT6/Spitfire fuse box is not Triumph's greatest design. The upper and lower blades are not one piece as you might think, they only connect via the ends of the fuse. Because they are not one piece they have little spring in them to grip the fuse, quite often only 3 of the 4 connect, causing all sorts of weird electrical faults, including sparks and blown fuses. Many of us have replaced the dodgy fuse box with a modern muli-blade fuse box. There are a number of very good threads on here detailing how it's done. Link to comment Share on other sites More sharing options...
HeebieGeebie Posted August 4, 2022 Author Report Share Posted August 4, 2022 @Pete Lewis sounds like a good idea. In that case my next project might be what you're suggesting @dougbgt6 @Stratton Jimmer thanks! I love the looks of these cars, it's amazing to have one after wanting one for years. Also, thanks for checking your fuses, for the time being hopefully i'll be alright with Halfords 35A glass fuses in that case 1 Link to comment Share on other sites More sharing options...
Peter Truman Posted August 4, 2022 Report Share Posted August 4, 2022 My electric fuel pump is separately fused off an ignition supply. Link to comment Share on other sites More sharing options...
Pete Lewis Posted August 4, 2022 Report Share Posted August 4, 2022 there are differences with some of the glass fuses on sale the std is 17 load /35amp blow there are too many on sale that are just 35 amp load heck knows what they blow at and that can be after the harness has had a melt down do be carefull if its only marked 35 then thats it Ka boom rules apply these fuses often have a flat strip of fusible not the wire fusible Pete Link to comment Share on other sites More sharing options...
Colin Lindsay Posted August 4, 2022 Report Share Posted August 4, 2022 2 hours ago, Iain T said: Pete, I have my Huco supply piggy backed off a green after my fuse box. So what you're saying is piggy back off the white switched live pre fuse box and install an in-line fuse? I have to say it makes sense to isolate the pump fuse. Iain I would piggy-back off before the fuse box; reason being that even with a fuse in the pump circuit the original fuse is still bearing the load of both circuits. Better still to have a dedicated single circuit for the pump, from a good supply, with its' own fuse inserted along the line. Link to comment Share on other sites More sharing options...
Iain T Posted August 4, 2022 Report Share Posted August 4, 2022 22 minutes ago, Colin Lindsay said: would piggy-back off before the fuse box OK as its easy I'll change it around. The white cable is from the ignition switch so only live when switched on. The load of the Huco is very low. Iain Link to comment Share on other sites More sharing options...
Iain T Posted August 4, 2022 Report Share Posted August 4, 2022 Any idea what the fuse rating is for the LP Huco pump. I've tried gugglin but can't find anything. Iain Link to comment Share on other sites More sharing options...
Pete Lewis Posted August 4, 2022 Report Share Posted August 4, 2022 giggling gets abetter response than Guggling Ha! i would have used a 5 or 10 it just needs a small protection they are not (should not be) a current guzzler Pete 1 Link to comment Share on other sites More sharing options...
Paul H Posted August 4, 2022 Report Share Posted August 4, 2022 20 minutes ago, Iain T said: Any idea what the fuse rating is for the LP Huco pump. I've tried gugglin but can't find anything. Iain Running 15amp on mine . I know it’s high guess 10 would be ok Paul 1 Link to comment Share on other sites More sharing options...
Pete Lewis Posted August 4, 2022 Report Share Posted August 4, 2022 we draw the line at a 6"nail pete Link to comment Share on other sites More sharing options...
Iain T Posted August 4, 2022 Report Share Posted August 4, 2022 26 minutes ago, Pete Lewis said: giggling gets abetter response than Guggling When I posted the bloomin auto spell 'corrected' to LP Huco pimp! I did edit it after posting..... Visions of Frank Zappa Hot Rats with Captain Beef heart....its in the songs words Willie the Pimp. So 3" nail it is then! Link to comment Share on other sites More sharing options...
dougbgt6 Posted August 4, 2022 Report Share Posted August 4, 2022 Doug 3 Link to comment Share on other sites More sharing options...
Chris A Posted August 4, 2022 Report Share Posted August 4, 2022 I'm ok for stock of all those except the 350 amp, guess I had better try and scrounge a couple when the hunting season starts next month. Link to comment Share on other sites More sharing options...
Ian Foster Posted August 4, 2022 Report Share Posted August 4, 2022 I would agree that the original fuse box is a bit basic and not very user friendly for adding additional electrical items. I have added a supplementary fuse box on the bulkhead which has a live feed off the starter solenoid. This box supplies various ancillary systems (headlamps, Huco fuel pump feed (but also relayed), electric fan/12V sockets and washers) Also a fuel inertia cut off switch on the bulkhead behind the battery, which gives some peace of mind in case of an accident. Link to comment Share on other sites More sharing options...
Badwolf Posted August 4, 2022 Report Share Posted August 4, 2022 3 hours ago, dougbgt6 said: Doug I'm ok for 350 amp...What rating for one of these?.... Link to comment Share on other sites More sharing options...
Colin Lindsay Posted August 4, 2022 Report Share Posted August 4, 2022 40 minutes ago, Badwolf said: I'm ok for 350 amp...What rating for one of these?.... Must be from the Ann Summers 'Maxi' collection... 1 Link to comment Share on other sites More sharing options...
Top Banana Posted August 6, 2022 Report Share Posted August 6, 2022 On 04/08/2022 at 18:31, Badwolf said: I'm ok for 350 amp...What rating for one of these?.... Al little of subject, I have been to both Kennedy and Johnson space centre, well worth a visit. I was also lucky to witness the last shuttle launch from coco beach in Florida. The immense power of the rockets on the shuttle (same as Saturn 5 Apollo rockets) the noise involved, means that all observers have to be at least 3 miles from the launch site. Link to comment Share on other sites More sharing options...
HeebieGeebie Posted August 16, 2022 Author Report Share Posted August 16, 2022 The source of my blown fuse was the overdrive wiring, but wasn't sure where abouts so i uncovered the gearbox and overdrive to understand how it's all connected. I have a J-Type overdrive and it's wired up in series without a relay. I've read this is ok due to low current draw of the J-Type solenoid. But one more reason to upgrade my fusebox. I think i've narrowed the problem down to the column switch. I decided i would disconnected the switched live from the column switch and see if the fuse still blew. As soon as i flicked the switch it blew, so now to try and figure out how to fix/replace it. 20220816_202249.mp4 Link to comment Share on other sites More sharing options...
NonMember Posted August 16, 2022 Report Share Posted August 16, 2022 That wiring is a little unconventional, and includes a "double bullet" with what looks like two different shades of green wire. Have you established the actual circuit it forms? The connection you've removed in that video is at the solenoid - the very last step in the run if I'm following the video right - so it's not surprising it still blew. All you've actually eliminated as a possibility is a short circuit solenoid, which is rare. Did you have the gearlever in 3rd/4th when it blew the fuse? I assume yes, because it looks like the inhibitor is between the fuse and the column switch. Link to comment Share on other sites More sharing options...
chrishawley Posted August 17, 2022 Report Share Posted August 17, 2022 Took me a while to figure out that wiring. Where's the relay gone, given it's a Mk2?? I think the answer is that it's been wired up in the manner of the late MK3 GT6 which used a simple series circuit rather than a relay (even if your colours arew non-standard). That would make sense of a 'double green' since the feed to the reverse light switch is piggybacked of the o.d. circuit. Do let us know the outcome. Link to comment Share on other sites More sharing options...
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