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Jan 17, 2022 15:46:13 GMT
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Hopefully a quick query:
An HT lead in good condition shouldn't shock a person (ie me) if removed should it? I have removed HT leads whilst running on many cars, usually to help identify misfires and never received a shock.
I fired up the G60 Corrado the other eve, pulled the first lead with no ill effect (aside from creating a misfire), went to pull the second and got a decent belt from it, one loud profanity rang around the close and I went inside, muttering something about hating VW's, never should have bought it blah blah blah and poured a beer.
Now the car does run rough and misses at higher revs, I suspect a sensor or something but then I thought actually, if I'm getting a shock off of that lead then there's potential that it could also be earthing out on the block perhaps?
There are other things I need to check but the weather and time have not been on my side.
Thanks in advance for any help!
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Jan 17, 2022 16:11:30 GMT
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I've had some that do, and some that don't! In this weather you could be getting shocks through damp etc, try a moisture repellant spray, or run it up in the dark, jumping to earth becomes obvious then. How old are the leads? Although with current parts issues old might be better than new...
Enjoy the beer 👍
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Jan 17, 2022 16:31:16 GMT
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I've had some that do, and some that don't! In this weather you could be getting shocks through damp etc, try a moisture repellant spray, or run it up in the dark, jumping to earth becomes obvious then. How old are the leads? Although with current parts issues old might be better than new... Enjoy the beer 👍 Agree, some do, some don't and in my experience it doesn't really point to a problem with the wires (or not). If it's shorting to earth you can often hear it (like a fast-paced tick-tick-tick noise that increases with rpm). Best use an insulated pair of pliers and/or rubber gloves in future, you never know which belt of electricity will be your last...
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Jan 17, 2022 16:44:25 GMT
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' Here, hold this.....!'😀
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I've had some that do, and some that don't! In this weather you could be getting shocks through damp etc, try a moisture repellant spray, or run it up in the dark, jumping to earth becomes obvious then. How old are the leads? Although with current parts issues old might be better than new... Enjoy the beer 👍 Thank you, I hadn't considered the weather! The leads I will assume are original so, 30yrs old? I've had some that do, and some that don't! In this weather you could be getting shocks through damp etc, try a moisture repellant spray, or run it up in the dark, jumping to earth becomes obvious then. How old are the leads? Although with current parts issues old might be better than new... Enjoy the beer 👍 Agree, some do, some don't and in my experience it doesn't really point to a problem with the wires (or not). If it's shorting to earth you can often hear it (like a fast-paced tick-tick-tick noise that increases with rpm). Best use an insulated pair of pliers and/or rubber gloves in future, you never know which belt of electricity will be your last... Yeah there may actually be a ticking now that I think about it, I haven't run the car for a couple of days now but will double check. And yes, it was a decent shock so will approach with caution next time, have never had it off of the leads before! ' Here, hold this.....!'😀 I may get a mate round and see if the results change haha!
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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Shocking HT leads!?slater
@slater
Club Retro Rides Member 78
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Jan 18, 2022 11:36:03 GMT
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I'd say it entirely normal. Especially if your pulling the lead off as your removing its usual route to ground and it will want to find another one! We have rubber gloves for doing this on the dyno and it even goes through (or more likely around) them!
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Jan 18, 2022 11:40:05 GMT
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I'd say it entirely normal. Especially if your pulling the lead off as your removing its usual route to ground and it will want to find another one! We have rubber gloves for doing this on the dyno and it even goes through (or more likely around) them! I think that makes sense, I must have just been lucky on the countless times I've pulled leads.
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mrbig
Part of things
Semi-professional Procrastinator
Posts: 491
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Jan 18, 2022 14:44:52 GMT
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I find the best way to check is to run the engine in the dark, if they are breaking down and shorting to ground you should be able to see sparks.
Having said that, if they are 30 years old, its probably worth changing them anyway to rule them out.
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1969 German Look Beetle - in progress
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jimi
Club Retro Rides Member
Posts: 2,075
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I'd say it's definitely not normal, the whole point of the insulation on the cable is to stop any leakage, if your getting a shock then its failing. It could be down to dampness, voltage can track across any moisture on the cables, especially if there are any cracks/splits in the insulation if the cables are dry and in good condition then you shouldn't get a shock. Running the engine at night in the dark can often show up any poor HT leads with lots of sparkles.
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Last Edit: Jan 20, 2022 0:17:10 GMT by jimi
Black is not a colour ! .... Its the absence of colour
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I find the best way to check is to run the engine in the dark, if they are breaking down and shorting to ground you should be able to see sparks. Having said that, if they are 30 years old, its probably worth changing them anyway to rule them out. Thank you, I have done this and there don't appear to be any sparks so I'm guessing it was maybe just dampness in the air, but as you say, 30yr old leads could do with replacing anyways! I'd say it's definitely not normal, the whole point of the insulation on the cable is to stop any leakage, if your getting a shock then its failing. It could be down to dampness, voltage can track across any moisture on the cables, especially if there are any cracks/splits in the insulation if the cables are dry and in good condition then you shouldn't get a shock. Running the engine at night in the dark can often show up any poor HT leads with lots of sparkles. Thanks Jimi, yeah seems that they could just be old and it was cold/damp out! Regardless, replacements are probably a shout.
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