 | Home > Technical > Overrun on gear change |
 
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| bob neville Member Since: 30 Apr 2009 Location: Marbella Posts: 3247   
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I am sure this has been posted on the site before but I can't find it.
On the way to work this morning the engine started over running on gear changes, go to change gear at 2500 rpm depress clutch as normal and revs keep going up (yes - foot off the accl. !!) to 3,000 or so and then very slowly drop down. All fine when not changing gear. Any ideas ?? Ta Bob 2015 Jaguar XE240 R Sport - goes like ....... !! 2013 Defender 90 CSW - sold 2009 Defender 110 Double Cab - sold 2001 TD5 90 CSW - offroad project - sold to a forum member 2011 Porsche Boxster - for the sunny days ! |
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27th Feb 2012 9:20am |
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| bob neville Member Since: 30 Apr 2009 Location: Marbella Posts: 3247
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Thanks Pete - that sounds familiar.
In the dealers at the moment so I will report back what they find. Bob 2015 Jaguar XE240 R Sport - goes like ....... !! 2013 Defender 90 CSW - sold 2009 Defender 110 Double Cab - sold 2001 TD5 90 CSW - offroad project - sold to a forum member 2011 Porsche Boxster - for the sunny days ! |
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27th Feb 2012 11:18am |
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| dgardel Member Since: 30 Nov 2008 Location: Veneto (Heart & Head) Posts: 3586 
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check the clutch switch on the clutch pump. Discovery 5 td6 HSE Stornoway Gray Outback Engineering Limited Edition
IID Pro MV License |
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27th Feb 2012 12:28pm |
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| Tim_NZ Member Since: 05 May 2008 Location: Australia Posts: 177 
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Check the fuse for the brake lights.
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27th Feb 2012 12:58pm |
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| bob neville Member Since: 30 Apr 2009 Location: Marbella Posts: 3247
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My monies on this. Fitted a worklight at the weekend and thought I had used the spare connectors for the heated rear window that a DC does not have, bet I have tapped it into one HW connector and one rear brake light 
Garage are going to check. Bob 2015 Jaguar XE240 R Sport - goes like ....... !! 2013 Defender 90 CSW - sold 2009 Defender 110 Double Cab - sold 2001 TD5 90 CSW - offroad project - sold to a forum member 2011 Porsche Boxster - for the sunny days ! |
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27th Feb 2012 1:24pm |
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| Tim_NZ Member Since: 05 May 2008 Location: Australia Posts: 177
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I had the same trouble when my trailer plug shorted. It's a strange side effect, but on the plus side it warns you that your lights don't work!
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27th Feb 2012 1:31pm |
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| bob neville Member Since: 30 Apr 2009 Location: Marbella Posts: 3247
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Update
It was my dodgy wiring - I blame the LR circuit diagrams 
Blew the brake light fuse and that in turn caused the over run. Thanks Tim - one to remember for the future plus don't trust the LR wiring diagrams 
Bob 2015 Jaguar XE240 R Sport - goes like ....... !! 2013 Defender 90 CSW - sold 2009 Defender 110 Double Cab - sold 2001 TD5 90 CSW - offroad project - sold to a forum member 2011 Porsche Boxster - for the sunny days ! |
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27th Feb 2012 5:55pm |
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| Dean Watson Member Since: 17 Jul 2011 Location: Derby Posts: 254  
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Hi
Im interested to know how the brake lights affect the revs as ive got a dc and was looking at utilising the same connections as you Bob, can you give me and indication what to use/not use. Cheers Deano |
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27th Feb 2012 7:13pm |
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| bob neville Member Since: 30 Apr 2009 Location: Marbella Posts: 3247
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Hi Deano
By blowing the fuse for the brake lights the ECU thinks there is a brake problem and for some reason adjusts the revs when changing gear, the dealer did try to explain why but I got lost ! The mistake I made was to use the supposed earth return in the spare wiring harness - it is not a return and hence blew the brake light fuse. What they did was to use the earth on the permanent live two pin connector for the worklight earth rather than creating a new earth point. I will check the exact pin that I used for the worklight in the morning but it is the one for the rear heated window. Up front I purchased a heated rear window switch and fog light switch, changed the fronts over so I have a heated window switch with a fog light front and then plugged that into the first space to the left of the hazard switch, provided you do not pull the existing blank out to hard the rear window harness is attached and can simply be connected to the switch. Worklight now has an illuminated switch plus the heated rear window warning light when it is on. Only downside is the light only works with the ignition on. I can't say this was my idea, Blackwolf first posted it. http://www.defender2.net/forum/topic9330.html Bob 2015 Jaguar XE240 R Sport - goes like ....... !! 2013 Defender 90 CSW - sold 2009 Defender 110 Double Cab - sold 2001 TD5 90 CSW - offroad project - sold to a forum member 2011 Porsche Boxster - for the sunny days ! |
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27th Feb 2012 7:44pm |
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| T1G UP Member Since: 08 Dec 2009 Location: Bath Posts: 3101  
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defenders have weird wiring...used a hand help midland CB at the weekend that was plugged into the 12v sockket. When i used the CB the wipers moved!
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27th Feb 2012 7:58pm |
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| Laurie Member Since: 22 Feb 2008 Location: Sussex, England Posts: 2897 
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You must have selected 'scanning' mode.  |
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27th Feb 2012 8:05pm |
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| bob neville Member Since: 30 Apr 2009 Location: Marbella Posts: 3247
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Weird is certainly true
Trying to use an existing unused circuit was a good idea but in future I think I will put my own circuits in for anything new, at least I will know what should be affected if I get it wrong. Bob 2015 Jaguar XE240 R Sport - goes like ....... !! 2013 Defender 90 CSW - sold 2009 Defender 110 Double Cab - sold 2001 TD5 90 CSW - offroad project - sold to a forum member 2011 Porsche Boxster - for the sunny days ! |
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27th Feb 2012 8:06pm |
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| bpman Member Since: 21 May 2008 Location: Oslo Posts: 8069 
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I've not had that - how did you fix it ? CSW's have the purple and black wires ready ! |
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27th Feb 2012 8:11pm |
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| Tim_NZ Member Since: 05 May 2008 Location: Australia Posts: 177
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Good to hear you got it sorted Bob!
Cheers, Tim |
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27th Feb 2012 11:58pm |
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