 | Home > Puma (Tdci) > High Revs for ~ 2 secs+ when changing gear foot off throttle |
 
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| willy eckerslike Member Since: 15 Jun 2009 Location: North yorks Posts: 1789   
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Yes presuming its working right, do a reasonably smart gear change coming back on the throttle and the revs should drop to match the next gear and stay as you carry onwards. The only thing that is annoying is if you change up to coast it holds the revs at the next gear for a tad too long. Don't get confused in lo box with the idle jack. Original Member Pie n Pea Club.
110 HCPU Tipper |
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30th Mar 2013 10:32am |
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| Natlas Member Since: 20 Mar 2013 Location: West Sussex Posts: 460 
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Defender spent the day back at the dealers yesterday for this and some other teething issues. The dealer pleaded ignorance but looked it up on a website they have. As has been suggested by others higher up the conversation this is apparently a deliberate feature but one which for some reason LR will not allow their dealers to give a copy of to their clients. Don't know why really because once you know what they're trying to do it's not that silly, it will no doubt just take some getting used to.
Anyway, the words I had to take notes of from the dealer went like this: "Engine speed holding momentarily when changing gear. This is a design characteristic to improve gearshift quality and reduce driveline shunt and noise. No fault exists". So there you have it, from LR themselves. Time will tell if we all get used to it or eventually have it mapped out (and then probably put it back again) 
Now I just want my door to close properly! Cheers all. John. 2.2 90 XS 88" Series One Old Norton 
Minerva |
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5th Apr 2013 5:51pm |
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| Dieselhead Member Since: 21 Oct 2012 Location: Pulborough. West Sussex Posts: 552 |
Which dealer John??
Harwoods Pulborough?? Chris 2008 XS 110 2.4 Utility. Tonga Green 1953 Series 1 for restoration 1983 Mini Mayfair 2004 VW T5 Camper 2008 Diahatsu Sirion. Thats hers Classic Bolens Garden Tractors |
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5th Apr 2013 9:06pm |
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| Happyoldgit Member Since: 14 Sep 2007 Location: Norfolk Posts: 3471 
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In the near two weeks I've had the loan 2.2 while my 2.4 is in for warranty fixes I've grown used to the rev hold feature. As I said earlier it makes for quicker gear changes - more car like than truck.
This is the second 2.2 I've had for a while, both have been the same, both seem to run out of puff quicker than my current standard tune 2.4. Steve. Owned numerous Land Rover vehicles of all shapes and sizes over the decades. Current Defender: A non tarts hand-bagged Puma 110 XS USW. [Insert something impressive here such as extensive list of previous Land Rovers or examples of your prestigeous and expensive items, trinkets, houses, bikes, vehicles etc] http://forums.lr4x4.com I used to be Miserable ...but now I'm ecstatic. |
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5th Apr 2013 9:11pm |
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| Natlas Member Since: 20 Mar 2013 Location: West Sussex Posts: 460
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hi Dieselhead, I'm not too keen to name names publicly at this point in time but I'll PM you.
Cheers, John. 2.2 90 XS 88" Series One Old Norton
Minerva |
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5th Apr 2013 9:12pm |
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| Japseroony Member Since: 02 Jan 2008 Location: North East England Posts: 807  
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Hi Guys,
There are 2 ECU's for the 2.2 with the first ending in AC and the second ends in AD - they changed sometime in 2012. The difference is not much but the "tip in" effect you are talking about has been reduced on the later ECU's although not by much. Also the later ECU's produce slightly more power (about 6 - 8 BHP) but dont worry, you wont have to buy a second ECU as its a dealer update that can be done for free either on a dealer visit or at service time so just ask them and they will do it and you then have an ECU that is AD inside but says AC on the sticker 
For info BAS can now tune your 2.2 Puma see here http://www.defender2.net/forum/topic18631.html but as yet this problem is still there even after the vehicle has been re-mapped - Pete however is looking at this with thoughts of reducing the "tip in" effect  Gas, Grass Or Ass - Nobody Rides For Free
"UNDERSTEER" ----is when you hit the fence with the front of the car. "OVERSTEER" ------is when you hit the fence with the rear of the car. "HORSEPOWER" ----is how fast you hit the fence. "TORQUE" -----------is how far you take the fence with you. |
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11th Apr 2013 12:42pm |
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| Natlas Member Since: 20 Mar 2013 Location: West Sussex Posts: 460
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Thanks Japseroony, interesting. I am finding that this 'overrun' exists even when you just take your foot off the throttle to slow down without touching the clutch. I think a re-map in future may be my preference after the warranty expires, if one is available by then.
Cheers, John. 2.2 90 XS 88" Series One Old Norton
Minerva |
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11th Apr 2013 9:29pm |
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| Ken Graham Member Since: 26 Jan 2013 Location: Glasgow Posts: 21 
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Hi John if you look back at the posts you will see I posted something similar on the 17/2/2013 , my Defender (new) is a Land Rover assisted change for my 2011 2.4 which they never managed to fix ! the new car covered less than 400miles and started to act up. it has a time delay when you first press the accelerator before the revs start to pick up , the design of the revs holding up when changing gear ( via the clutch switch ) is unreliable in that the revs holding up are never at the same revs twice !!!! the car has now been fitted with a new clutch switch and two new accelerator pedal boxes and it is just as bad . it is not a good experience to drive especially off road.
Four months later Land Rover have suggested that both the engine ECU and the Alarm ECU may be corrupt and it is booked in this coming wednesday to have both components changed. Will keep you posted, fingers crossed. Cheers Kg |
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13th Apr 2013 12:21am |
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| Natlas Member Since: 20 Mar 2013 Location: West Sussex Posts: 460
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Hi Ken,
very interesting, please do advise how this goes, hopefully we can all learn from it in the end.Thanks, John. 2.2 90 XS 88" Series One Old Norton
Minerva |
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13th Apr 2013 10:07am |
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| Natlas Member Since: 20 Mar 2013 Location: West Sussex Posts: 460
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Ken,
Some more observations of mine. The rev holding only seems to happen when changing up, (accelerating), the ECU seems to know not to hold the revs when you are changing down to slow down. It also 'holds' the revs at different levels depending upon how many revs you are using on the way up, so if you go up to 3,000rpm and then change up it will hold the revs at 2,000 to 2,500 but if you accelerate slowly and change gear at say 1800rpm it will hold the revs at maybe 1500 rpm. In between, there are times when you change that it holds the revs above the rpm the next gear changes to, which is when the crunching can start. All this means there is a little bit of intelligence operating, but not a lot. 
Cheers, John. 2.2 90 XS 88" Series One Old Norton
Minerva |
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13th Apr 2013 3:32pm |
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| RobKeay Member Since: 19 Jul 2009 Location: Stafford Posts: 1579
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Don't have a problem with my 2.2. The only time I don't like it is at low revs in second gear. Done 20k now no issue. I do find it drives better if change quicker.
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13th Apr 2013 3:48pm |
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| Ken Graham Member Since: 26 Jan 2013 Location: Glasgow Posts: 21
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Hi john
I have three basic different problems , like yours the revs do hold up on the up shifts and at varying different levels and not always in sync with the road speed when making the shifts. Secondly and infrequently when braking in gear it keeps accelerating for a short while (poss 1- 2 seconds) bit unnerving ! Finally I have the issue of the free play or time lapse when the pedal is first pressed , giving you the impression nothing is happening and makes you apply the pedal further- when the revs do kick in they are higher than expected and causes the car to surge ! very irritating when driving off road or manoeuvring a trailer. And depending how it feels at randomly lets off a right good diesel knock around 1400rpm when accelerating ( not even heavy load) Plus I have a intermittent alarm warning light the randomly flashes when you are driving , any revs , any gears , any conditions. I am sure it will all be fixed soon 
Cheers Ken. My 2.4 that got replaced had a flat spot just over 2000rpm which if you held the revs at that speed it would kangaroo as long as you wanted it to .. didn't get fixed in 14k miles or 10 months |
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14th Apr 2013 12:28am |
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| RobKeay Member Since: 19 Jul 2009 Location: Stafford Posts: 1579
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Shame you live in Glasgow cause I would be more than happy for you to have a go in mine to compare. Your issues sound like there's something upsetting the ecu.
When I first had my 2.4 it poured out with blue smoke on cold start. Went into dealers they updated the ecu and the blue smoke went. My grandad was convicened the piston tongs had gone but it was just a software issue. I complained about the kangerooing in 2nd, went into dealer updated software seems to be better. |
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14th Apr 2013 12:48am |
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| Ken Graham Member Since: 26 Jan 2013 Location: Glasgow Posts: 21
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Cheers Rob
Think you are on the right track , they seem to think the ECU is corrupt , I am not sure - seems like something is interfering with it. Will keep you posted after it has been back to Land Rover this wednesday. Cheers Ken - doesn't put me off it  |
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14th Apr 2013 12:56am |
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