HT Leads

Post any Tech Tips or any matters and questions relating to upkeep
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Tim
Posts: 77
Joined: Fri May 06, 2011 4:00 pm
Location: Wiltshire

HT Leads

Post by Tim » Sun Feb 24, 2013 1:58 am

Does anyone have a photo of the correct routing for the HT leads on a Tiger?

My car has a right hotch-potch of Unipart leads which I strongly suspect are the cause of a mis-fire over 4000 rpm.

I'm about to order a set from Magnecor and I want to make sure they're right. They do a set for the Mustang 289 so apart from the coil lead I assume that they are the correct length. My car has a 289 with a Mallory distributor and headers so I'm guessing that 90 degree boots at the distributor end and 35 degree boots at the plug end should be ok.

The rocker covers do not have any brackets the clip the leads to, so I'm also interested in how to get that right.

Thanks

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redbaron
Posts: 111
Joined: Sun Aug 16, 2009 6:18 pm
Location: Essex

HT Leads

Post by redbaron » Sun Feb 24, 2013 10:13 am

Tim,
when replacing the HT leads,make sure that you try to keep leads number 7 and 8 separate as they can be prone to causing a misfire if run too close together,although this may not be the case with more modern lead insulating materials,early leads were prone to this.
A good idea of how to run the leads is in the workshop manual,you will need the rocker cover clips or a good alternative if possible to stop leads from not only looking untidy but to keep from stg shaft etc,

Tim
Posts: 77
Joined: Fri May 06, 2011 4:00 pm
Location: Wiltshire

Post by Tim » Mon Feb 25, 2013 8:18 pm

Thanks David,
Making sure that numbers 7 & 8 are not touching does make a difference - it moves the mis-fire up the rev range by 200rpm!

Tomaselli
Posts: 942
Joined: Fri Sep 30, 2005 2:03 pm
Location: Cheshire, North West England

Post by Tomaselli » Mon Feb 25, 2013 10:27 pm

OK, now you know the HT leads didn't cause the misfire. Let the fun commence :mrgreen:

You still on condensor and points? Tried another coil? Rotor arm and dizzy cap worth checking, so it feels like an electrical misfire?

I had a misfire once, couldn't trace it for ages, until I changed the brand of spark plugs 8)

garyv8tiger
Posts: 650
Joined: Sun Dec 30, 2007 10:57 am

Post by garyv8tiger » Mon Feb 25, 2013 10:40 pm

bet your car feels strange with no misfire . :mrgreen: didnt dave herning fix it for you?

Tomaselli
Posts: 942
Joined: Fri Sep 30, 2005 2:03 pm
Location: Cheshire, North West England

Post by Tomaselli » Mon Feb 25, 2013 10:48 pm

It needed a specialist to fix it :)

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