 | Home > Technical > Why is it revin between gear change? |
 
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| william8 Member Since: 03 Apr 2013 Location: Motherwell Posts: 259   
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open bonnet
unplug sensor on top of the clutch piston unit. enjoy hehe daft computers think they can drive better than us now! William |
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9th Aug 2013 7:06pm |
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| LandRoverAnorak Member Since: 17 Jul 2011 Location: Surrey Posts: 11324 
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If it's just started happenng then it's a fault rather than a 'feature'. It probably is the clutch switch though. Darren
110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak "You came in that thing? You're braver than I thought!" - Princess Leia |
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9th Aug 2013 7:33pm |
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| ARC99 Member Since: 19 Feb 2013 Location: North Yorkshire Posts: 1831 
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Mine will run for a couple of months without reving between gear changes then it will start do so, the next day it stops for a couple of months, fault codes checked .............nothings. Don't make old people mad.
We don't like being old in the first place, so it doesn't take much to  us off.
Richard |
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9th Aug 2013 10:53pm |
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| bob neville Member Since: 30 Apr 2009 Location: Marbella Posts: 3248  
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Make sure your brake lights are working - yes there is a connection
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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10th Aug 2013 12:32pm |
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| landybehr Member Since: 17 Apr 2013 Location: -D- Posts: 173 |
spooky. 
Just had a look at the wiring diagram. Never expected there to be a connection to the ECU. But it is (2.2TD4 at least). A connection is just "behind" the switch. But non working lights shouldn´t have an effect then. |
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10th Aug 2013 7:51pm |
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| bob neville Member Since: 30 Apr 2009 Location: Marbella Posts: 3248
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On the 2.4 if the brake lights go (especially the fuse) you get high rev holding on gear change. Happened on my 2009 110 when the fuse went - confused everybody for a few hours
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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10th Aug 2013 8:40pm |
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| Norm4n Member Since: 31 Aug 2012 Location: Surrey Posts: 329
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Ok thanks will check tomorrow.
I'm sure it only happens in first and second gear. |
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10th Aug 2013 9:08pm |
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| bell-auto-services Member Since: 08 Jul 2007 Location: North Yorkshire Posts: 2232 
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As said above the brake switch and fuse are important to correct engine running. Below is a diagram showing the switch, fuse and ECM. All related parts must be working correctly and be fully funtional as not to have running quirks and anomalies.
Pete  Click image to enlarge |
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10th Aug 2013 9:54pm |
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| Norm4n Member Since: 31 Aug 2012 Location: Surrey Posts: 329
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Any other ideas for this, checked my fuses and no bulbs blown either.
The anti-stall does not work in low range either (I.e. the revs do not increase when in low) Thanks |
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17th Aug 2013 7:05pm |
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| gbmud Member Since: 02 Jun 2013 Location: Sussex, UK Posts: 167 
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You checked that the brake lights actually work did you, not just that the fuse and bulbs are OK?
Anti-stall does not raise the engine revs, it resists them dropping and the engine thus stalling. The raised tick-over in low range is something to do with preventing the car running too slowly in low gears - which seems a little odd. The raised tick-over must be triggered by a switch on the high/low gear selector. Chris |
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22nd Aug 2013 10:12am |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17443 
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The 'idle jack' only works in low first, none of the other low range gears.
If you engage low first and drive a short way, then depress the clutch and stop, you should find the revs drop. Simply engaging low box won't affect the engine revs on tick over. As noted above, the idle jack is completely different to the anti stall and is provided to prevent excessive engine braking in low first, especially on steep loose descents. Edit - the ecu uses inputs from the high.low selector shaft switch, the first gear selector, and the clutch pedal switch to operate idle jack. |
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22nd Aug 2013 11:21am |
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| Norm4n Member Since: 31 Aug 2012 Location: Surrey Posts: 329
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It's now stopped revvin, under it's own accord!
Weird motor car... |
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27th Aug 2013 11:38am |
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| D'MARIQUE Member Since: 17 Aug 2013 Location: Russia, Ekaterinburg Posts: 17 
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Hmmm...Same stuff here!
 Gonna check my lights...(reason sounds wierd) 
Update: yeah, right! The stop lights fuse was the reason. The upper stop light (on the 5th door) - doesn't play any role, but the side lights do:) I've replaced the fuse & it's ok now! Thanks, mates! |
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29th Aug 2013 6:39am |
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| Skye_Rover Member Since: 29 Aug 2013 Location: Skye Posts: 85 
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2.4 Puma will definitely be sensitive to clutch switch failure and its wiring. If you are not getting gear recognition (which is derived from vehicle speed over engine speed), then you need to look at your vehicle speed input to the ECU. Roads? Where we're going, we don't need roads.
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31st Aug 2013 10:34pm |
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