 | Home > V8 > Misfires are back! |
 
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| ian series 1 Member Since: 17 Nov 2014 Location: south Posts: 3127   
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What distributor set up are you running on?
Electronic ignition? points/condensor? I presume your on carbs and not EFI? 80" 80" 86" 88" 90" Wanted, Forward Control Anything considered. |
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21st Nov 2016 8:20am |
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| John Fair Member Since: 10 May 2016 Location: Norfolk Posts: 150 
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Did you replace the ht leads? I once had an issue I chased for ages. It was perticularly bad on a dark foggy evening and when I opened the bonnet it was like a mini Blackpool illuminations. Shorting out everywhere they touched. You certainly couldn't see it in the daylight or if it wasn't damp.
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21st Nov 2016 8:21am |
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| charcoal Member Since: 28 Jul 2014 Location: Hampshire Posts: 941 
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Using the Lucas 35DLM8 dizzy with electronic ignition, SU carbs.
It's had a new set of leads back in June could they be shorting out already? 1999 Land Rover Defender 110 td5 station wagon 1998 Land Rover Defender 110 County Station Wagon ~ Sold 1995 Land Rover Defender 110 V8 Station Wagon ~ Sold 
1985 Land Rover 110 ex mod project Tithonus ~ Sold |
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21st Nov 2016 4:01pm |
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| K9F Member Since: 12 Nov 2009 Location: Bournemouth Posts: 9610 
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Is it dampness related? Does it happen in dry weather conditions as well? My V8 Discovery was a nightmare a marigold glove and a few strategic cable ties on the leads exiting the fingers sorted it for me. If you go through life with your head in the sand....all people will see is an ar5e!!
Treat every day as if it is your last....one day you will be right!! |
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21st Nov 2016 4:04pm |
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| charcoal Member Since: 28 Jul 2014 Location: Hampshire Posts: 941
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It happens in damp and dry weather
 1999 Land Rover Defender 110 td5 station wagon
1998 Land Rover Defender 110 County Station Wagon ~ Sold 1995 Land Rover Defender 110 V8 Station Wagon ~ Sold
1985 Land Rover 110 ex mod project Tithonus ~ Sold |
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21st Nov 2016 4:17pm |
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| rallysteve Member Since: 10 Feb 2014 Location: Cumbria Posts: 2196 
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Have you tried a different ignition amplifier and coil? 02' 110 TD5 Double Cab Rebuild Thread
84' 90 3.9 V8 Caged Pickup Build Thread - Now For Sale Mobile Diesel Heater Build Thread |
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21st Nov 2016 4:31pm |
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| John Fair Member Since: 10 May 2016 Location: Norfolk Posts: 150
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Only you can answer that. I fitted magnacor leads and they would run under water. It was only a suggestion. The Lucas type your talking about,does it have a black and white external module. If so I recall theses being quite unreliable but replaceable. I'm Shute someone with a more current memory will be along shortly 👍
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21st Nov 2016 5:15pm |
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| charcoal Member Since: 28 Jul 2014 Location: Hampshire Posts: 941
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I've replaced the ignition amplifier a month ago when it was shorted out by loose swarf in the dizzy. Haven't replaced the coil as it was new in June along with the ignition leads. Is it something which could break in such a short space of time? 1999 Land Rover Defender 110 td5 station wagon
1998 Land Rover Defender 110 County Station Wagon ~ Sold 1995 Land Rover Defender 110 V8 Station Wagon ~ Sold
1985 Land Rover 110 ex mod project Tithonus ~ Sold |
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21st Nov 2016 5:18pm |
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| charcoal Member Since: 28 Jul 2014 Location: Hampshire Posts: 941
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Yes, that's the amplifier I have. I would try magnacor leads except they're something stupid like £150. A lot of money when they may or may not help. Will have a look at the engine running tonight to see if I have any shorting sparks. 1999 Land Rover Defender 110 td5 station wagon
1998 Land Rover Defender 110 County Station Wagon ~ Sold 1995 Land Rover Defender 110 V8 Station Wagon ~ Sold
1985 Land Rover 110 ex mod project Tithonus ~ Sold |
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21st Nov 2016 6:01pm |
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| ian series 1 Member Since: 17 Nov 2014 Location: south Posts: 3127
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Worth mentioning that just that it's a new electrical part, doesn't mean it's any good.
I've had faulty coils, condensers, points that didn't work etc, I have had a champion plug that didn't work out of the box! Even the branded Lucas parts are of questionable quality nowadays. A lot of the aftermarket ignition stuff is rubbish, I always get parts from the Distributor Doctor, or N.O.S if you can find it. May be worth doing a compresion test, just to make sure everything inside is as it should be? 80" 80" 86" 88" 90" Wanted, Forward Control Anything considered. |
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21st Nov 2016 6:46pm |
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| GREENI Member Since: 22 Aug 2010 Location: staffs Posts: 10358
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I'd say coil !
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21st Nov 2016 7:07pm |
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| charcoal Member Since: 28 Jul 2014 Location: Hampshire Posts: 941
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Just checked the engine in the dark for the wires shorting out and see no sparks, can't really test it under load like when it generally happens though.
I will look at buying a new coil, can't afford a Bosch one as I heard they're good, are there any aftermarket ones that're any good? Accuspark and Stealth are two affordable ones that come up when searching. I have a plans to do a compression test and a leak test as the engine has drunk a fair amount of oil since the last proper oil change in May. 1999 Land Rover Defender 110 td5 station wagon 1998 Land Rover Defender 110 County Station Wagon ~ Sold 1995 Land Rover Defender 110 V8 Station Wagon ~ Sold
1985 Land Rover 110 ex mod project Tithonus ~ Sold |
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21st Nov 2016 11:42pm |
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| charcoal Member Since: 28 Jul 2014 Location: Hampshire Posts: 941
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I decided to go all out and buy a Bosch ignition coil, go big or go home as they say! Anyway, I fitted it this afternoon and took it for a test drive when it was stone cold. Gave the engine a good hammering and not a single misfire (yes I know it's not healthy but for the sake of accurate results I did it once)! Tonight I will take her down the A27 to test for the high speed misfires and will update the post with the results.
Thanks Ian and Greeni for suggesting it's the coil  1999 Land Rover Defender 110 td5 station wagon
1998 Land Rover Defender 110 County Station Wagon ~ Sold 1995 Land Rover Defender 110 V8 Station Wagon ~ Sold
1985 Land Rover 110 ex mod project Tithonus ~ Sold |
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23rd Nov 2016 6:29pm |
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| GREENI Member Since: 22 Aug 2010 Location: staffs Posts: 10358
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Glad it's sorted.
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23rd Nov 2016 6:58pm |
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