bortaf
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Posts: 4,549
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May 13, 2015 20:56:50 GMT
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First off you can't get a bosch pump for the sierra TD so i'm stuck with lucas  ok you can but they were a rare euro fittment so rather hard to find Anyhoo i run a weak cooking oil/petrol/2stroke diesel mix in my P100 daily and i accidently used a gallon of petrol in an empty tank, DOH ! it ran ok as the pertrol was well off, about 8 years old so not really petrol anymore lol, it certainly didn't smell like petrol i just used the wronge can that day  Anyhoo after a week or so (after i'd run straight doosel/2stroke for 3 tankfulls) the stop solenoid stopped stopping the engine if you follow me, fitted a good spare and it still refused to switch off, fitted a new SS and it still refuses to stop, it does however stop on the key every 100 or so attemps? are there any other seals that could have gone inside? it runs the same as it ever did it's just i have to stall it 99% of the time. |
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May 14, 2015 18:09:04 GMT
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This might sound ridiculous but if you flash the headlamps (after turning off the key), does that stop the engine?
The reason I ask is that I've had an Orion Diesel and a Fiesta that wouldn't turn off until you flashed the lamps...
It was many many years ago but I seem to recall the fuse/relay box was at fault, and maybe an ign switch on one too...
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Al.
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May 14, 2015 19:44:41 GMT
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Can you see the stop solenoid moving when its powered up on these while not fitted? At a guess I would say the plunger it operates in the pump has got a bit sticky or dry from the fuel.
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MrSpeedy
East Midlands
www.vintagediesels.co.uk
Posts: 4,786 
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May 14, 2015 20:54:33 GMT
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Strangely enough, we had the same problem in our 1.8td powered 400e.
Initially when we built it a was well, but it developed a similar trait
We used to just stall it when it wouldn't switch off, but I discovered that of the brakes were held on (so the stop lights were on) then it would stop on the solenoid without stalling.
Conversely, if I started the engine but didn't blip the throttle to cut in the alternator, it also stopped on the solenoid.
I've since put in a scratch built loom, but have yet to see if the same problem exists.
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May 14, 2015 22:58:28 GMT
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Hi, thinking about the symptoms I think there is a connection between battery power and the ignition circuit somewhere. It is only a weak link but enough to allow a few volts to hold the already energised stop solenoid, but operating the lights puts too much load on it and it collapses and the SS lets go. It will probably be somewhere there is battery and ignition power, so it could be dampness in the fuse box as suggested or maybe the glow plug relay or a duff component in the alternator or two wires in the loom shorting together,it could be anywhere. So try disconnecting different things one at a time and moving or twisting the loom about to try and isolate it. Good luck.
Colin
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duff diode from the alternator to ign light causing a backfeed to the stop solenoid. on my fiesta it was about 6" back down the alt wiring.
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bortaf
Posted a lot
Posts: 4,549
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May 15, 2015 16:16:10 GMT
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I had similar in the ex's escort diesel, if the sidelights were on and the brake lights it wouldn't turn off but i've removed the wire from the solenoid so no chance of power getting there and it still runs lol, also tested the live feed and it comes and goes with the key (it uses the origional coil live feed from when it was a petrol). I've tested all the solenoids off the vehical and they all go in and out as they should although the first one did have a bit of seal missing (checked the hole and it's not stuck in the pump, the seal was very soft and it looked like it had melted rather than broken off), i even added an extra spring in case there wasn't enough tension on it to shut the fuel off but no differance, today it switched off fine ? only 20 tries to get it to work as it should  TBH i'm a mechanic so the only questions i usually ask are toughys that stump me, not big headed but i work with a 50Yr time served mechanic (IE an old fart) and he's as stumped as me and 3 weeks later we are still stumped, hense i ask in the place where strange things happen all the time (comes with playing with old machinery). Cheers for the ideas, keep em coming cos i'm out of em  |
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Last Edit: May 15, 2015 16:18:29 GMT by bortaf
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MrSpeedy
East Midlands
www.vintagediesels.co.uk
Posts: 4,786
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May 15, 2015 16:58:17 GMT
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Has your pump got the mechanical shut off lever on the top?
Have you tried that?
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joe90
Yorkshire and The Humber
Posts: 1,027
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May 15, 2015 21:15:12 GMT
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I had a similar problem with a Mercedes 308 some years ago, running it on allsorts and started doing as yours has done but shut off immediately when it got pump diesel in it, might be worth a try.
Bryan
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bortaf
Posted a lot
Posts: 4,549
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May 16, 2015 11:33:40 GMT
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I ran 3 tankfulls of diesel/2stroke oil through it, i ran that through it after the mistake and it started playing up after i went back to normal fuel ? No manual stop lever no it stopped again today as it should on the key ! driving me mad LOL I've even had the SS back out and cleaned the seat of the seal, again. |
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rodney
Posted a lot
https://www.facebook.com/RD-vehicle-transport-and-recovery-services-525622614268010/
Posts: 1,677
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May 19, 2015 22:11:51 GMT
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on a td subject , is there anything that can be added to biodiesel to stop it killing the manual boost compensator rubbers on the lucas pump? , sierra style pump ,
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facebook: rodney dean / rd transport  |
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what about adding a small light onto the ss terminal? that way at least you would be able to see if its electrical(key etc) or mechanical(stop solenoid)
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MrSpeedy
East Midlands
www.vintagediesels.co.uk
Posts: 4,786
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I just fired up our 400e for the first time after it's rewire yesterday, and it still needs the brakes (lights) on for the stop solenoid to switch off, and I still don't know why!
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bortaf
Posted a lot
Posts: 4,549
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May 20, 2015 11:34:07 GMT
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on a td subject , is there anything that can be added to biodiesel to stop it killing the manual boost compensator rubbers on the lucas pump? , sierra style pump , Yes use more diesel, more than 70% ish BIO degrades or shrinks the seals, run less bio in the mix and it's OK or fit bio safe seals BUT i cant find anywhere that will sell them, fit them yes, sell them no Grrr  not even to trade which is rather anoying, at least it meens they are out there. |
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bortaf
Posted a lot
Posts: 4,549
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May 20, 2015 11:36:44 GMT
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what about adding a small light onto the ss terminal? that way at least you would be able to see if its electrical(key etc) or mechanical(stop solenoid) Already cpmpleatly removed the feed wire and it still ran so no point with the lamp but cheers for keeping on trying  so far this week it has turned off correctly at least once a day (i usually start and stop it 30+ times a day) i think it's just winding me up (it's working lol). |
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bortaf
Posted a lot
Posts: 4,549
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May 20, 2015 11:39:27 GMT
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I just fired up our 400e for the first time after it's rewire yesterday, and it still needs the brakes (lights) on for the stop solenoid to switch off, and I still don't know why! On my escort it was a short in the sidelight relay back feeding the ign live via the dimdip, that wont be your issue ! lol i expect as the brake lights are IGN live controled and there's a short or backfeed somwhere? usually in the bulb holder if it's stop and tail or the main plug area? |
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May 20, 2015 16:46:11 GMT
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It's got to be internal in the pump as you've eliminated the ss is it possible to strip that bit of the pump in situ?
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bortaf
Posted a lot
Posts: 4,549
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May 21, 2015 18:41:39 GMT
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Not sure TBH ? i'll have to relook over a scematic of the pump Today i started it maybe 20 times and not once did it stop on the key, UNTIL, on the way home i popped in tesco and curse word me it turned off on the key, so all excited i restarted it 10 times and every time it stopped on the key !, left tesco got home and back to having to stall it Grrr May have to move to tesco |
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May 21, 2015 20:33:03 GMT
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Nah Tesco's get shirty if you stay more than 2 hours, BUT there car park isn't on a slight slope by any chance is it?
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ok you can but they were a rare euro fittment so rather hard to find 
not even to trade which is rather anoying, at least it meens they are out there.