Is it best to do this at the distributor or directly off the top of the spark plug?
How dangerous is it to do with the engine running (I know this is the ideal case but I'm almost certainly going to electrocute myself)?
TIA as always
Disconnecting HT Leads
Moderator: martauto
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George
- E30 Zone Addict
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- Joined: Sat Nov 11, 2006 11:00 pm
- Location: Landarn
In order to identify a misfiring cylinder, I know it is common practice to disconnect each HT lead one by one.
Is it best to do this at the distributor or directly off the top of the spark plug?
How dangerous is it to do with the engine running (I know this is the ideal case but I'm almost certainly going to electrocute myself)?
TIA as always
Is it best to do this at the distributor or directly off the top of the spark plug?
How dangerous is it to do with the engine running (I know this is the ideal case but I'm almost certainly going to electrocute myself)?
TIA as always
Sold: 1986 E30 325i Cabriolet, Alpine White
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e30topless
- E30 Zone Team Member
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- Joined: Wed Aug 23, 2006 11:00 pm
- Location: surrounded by scrap
take it off the spark plug, I would advise turning the engine off whilst doing so !
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Speedtouch
- Old Skooler
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- Location: Canterbury
Safe as long as you use a rag or rubber/dry cloth gloves to insulate yourself.
It's not necessarily dangerous (unless you have a heart condition or pacemaker fitted) to do it with bare hands, but it may well give you a nasty jolt, so best to ensure that you're insulated.
It's not necessarily dangerous (unless you have a heart condition or pacemaker fitted) to do it with bare hands, but it may well give you a nasty jolt, so best to ensure that you're insulated.
///M aurice
ECU Upgrade EPROM Chips, £40 posted within the UK. Note these are not Zone chips.
viewtopic.php?f=6&t=279421
ECU Upgrade EPROM Chips, £40 posted within the UK. Note these are not Zone chips.
viewtopic.php?f=6&t=279421
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George
- E30 Zone Addict
- Posts: 2153
- Joined: Sat Nov 11, 2006 11:00 pm
- Location: Landarn
Thanks.
Will post tomorrow regarding update, assuming I still have hands.
Will post tomorrow regarding update, assuming I still have hands.
Sold: 1986 E30 325i Cabriolet, Alpine White
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Brianmoooore
- E30 Zone Team Member
- Posts: 49359
- Joined: Mon Jan 10, 2005 11:00 pm
Pull a spark plug lead off of a running engine, or start one with a lead off, and you run the risk of 'spiking' the ECU when the EHT voltage goes through the roof and flashes over.