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David Vittachi
Newbie
Alberta
Mark2TourerV

Posts: 2
Reg: 03-2011

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 Friday, July 20, 2012 - 12:38 am, by:  David Vittachi (Chukichukka) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
I want to figure out which of my 6 coils is fried. Is there an easy way to test them to find out which one is bad? This way I wont have to replace all 6!! :-)
Boris Siljanoski
Goo Roo
Western Australia
LS400 + Soarer.

Posts: 1647
Reg: 11-2007

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 Friday, July 20, 2012 - 02:08 am, by:  Boris Siljanoski (Z2tt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Without special instruments there is no easy way, have a known good spare, keep swapping them in until you find the bad one of the batch.
Tom Richards
Goo Roo
nsw
V8

Posts: 1144
Reg: 08-2005

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 Friday, July 20, 2012 - 06:39 am, by:  Tom Richards (Tomr) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
i dont kmow anything about the TT coils, but try measuring them all with a multimeter.
Shane Haverkamp
DieHard
nsw
soarer TT

Posts: 826
Reg: 10-2007

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 Friday, July 20, 2012 - 03:38 pm, by:  Shane Haverkamp (Havabeer) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
easy...

1 take off the coil over plastic cover thing (think its 6 or 8 hex head bolts).

2 with the car idling. unplug first coil via its little clip thing, car revs should drop and get lumpier.

3 replace plug car should rev better.

4 repeat process on all 6 coil packs. if you suspect one is gone when you unplug it nothing will change.

other then that you can just rip them out and have a visual inspection of them and the spark plugs
Boris Siljanoski
Goo Roo
Western Australia
LS400 + Soarer.

Posts: 1653
Reg: 11-2007

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 Friday, July 20, 2012 - 06:32 pm, by:  Boris Siljanoski (Z2tt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Testing with multimeter won't always reveal problems, When they heat up during operating is when defects show.

Also testing at idle is a good idea and yeah will work but won't reveal defective ones only failed ones.
Daniel Clarke
Goo Roo
NSW
TT 2.5L 6 cylinder

Posts: 6955
Reg: 03-2006

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 Friday, July 20, 2012 - 09:29 pm, by:  Daniel Clarke (Dieseltrain) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
I wouldn't muck about with 20+ yr old coils ... Get set of new ones , and enjoy :-)
Tom Richards
Goo Roo
nsw
V8

Posts: 1146
Reg: 08-2005

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 Saturday, July 21, 2012 - 08:13 am, by:  Tom Richards (Tomr) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
boris, sure, a multi meter can confirm a coil is stuffed, but can not always confirm if it is ok at temp. An easy check that will sometimes(not always) find the fault.

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