 | Home > Td5 > Crank sensor failing symptoms? |
 
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| bob neville Member Since: 30 Apr 2009 Location: Marbella Posts: 3248   
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James
My crank sensor did not fail but the shim was missing on mine. The main symptom on mine was a flat spot at 2000 rpm which you could drive through but it was very noticeable. Not sure if this is of any use. 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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6th Apr 2017 5:02pm |
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| mk1collector Member Since: 17 Sep 2009 Location: West Yorkshire Posts: 6769  
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Not in the defender but in my youth I had a mk2 cavalier which had very similar symptoms which turned out to be splits in the air intake pipes. Don't know if it will help but worth checking. Ray
My build thread http://www.defender2.net/forum/topic17615.html |
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6th Apr 2017 5:06pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20433 
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Are you sure that's not just slack in the drivetrain?
The Defender by nature has quite a bit, mine does the same thing pretty much and always has. $W33T $0U7H3RN $UG4R 🇬🇧🏴🏴🏴🇮🇪🇺🇸⛽️🛢️⚙️🧰💪 |
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6th Apr 2017 5:13pm |
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| barbel jim Member Since: 12 Dec 2012 Location: Northants Posts: 1423 
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I'd look at the accelerator first. No experience with them but believe I've read somewhere about thgem working n resistence. I also think theres 2 types for a TD5
On my cossie when the crank sensor failed it wouldnt start let alone run |
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6th Apr 2017 5:49pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20433
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Do you ever notice any changes with gear changes associated too?
Clutch switch maybe something to do with it... $W33T $0U7H3RN $UG4R 🇬🇧🏴🏴🏴🇮🇪🇺🇸⛽️🛢️⚙️🧰💪 |
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6th Apr 2017 5:51pm |
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| 4RF RDS Member Since: 19 Jul 2015 Location: Ottawa Posts: 937  
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I'm with Custon90Steve on this, check all splines and axles, u-joints and diff play. Once you get the driveline tight if its still present conisder DMF. What's your mileage? 2010 Range Rover MkIII Autobiography Super Charged (Idris)
2003 Range Rover Mk III (Desmond FitzWilliam) 2000 Defender 110 CSW TD5 (CTX) 1992 Range Rover Classic (Lizzy) 1972 Series III 300 Tdi (Stanwood) 1967 MGB GT Every normal man must be tempted at times to spit on his hands, hoist the black flag, and begin to slit throats. H. L. Mencken (1880 - 1956) |
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6th Apr 2017 11:00pm |
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| Jimb1978 Member Since: 05 Sep 2012 Location: Huddersfield Posts: 808 
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I've checked the drive flanges and props. It had a new gearbox and dmf at 72000 and is currently on 94000. I haven't looked at the diff or transfer box but with a wheel jacked up there doesn't seem to be excessive play.
The main reason I suspected something electrical is that once the engine is warm the problem all but disappears. How do I check play within the diff or transfer box? How much rotation at the flanges before it moves the other end is "normal"? I've owned a couple of high mileage defenders and discoveries and neither had this problem, both 300 tdi 2002 110 td5 |
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7th Apr 2017 6:28am |
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| excossack Member Since: 22 Feb 2012 Location: North West Posts: 5850 
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If its any help I get similar, replaced the throttle pedal for LR gen item and I still have at least 10mm (maybe more) of travel on the pedal before any revs pick up).
If I don't lift off the pedal all the way and change gear I can get a smoother gear change. Other times its like a lag between me pressing the pedal and then a clunk. FWIW I have a 99' 110 Td5 with a 10p engine. 1999 Defender TD5 110 Regards John M0VAZ Econet Station 48 no clock |
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7th Apr 2017 7:20am |
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| Caterham Member Since: 06 Nov 2008 Location: Birmingham Posts: 6300 
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I think I'm right in saying that the workshop manual suggests the cps is only monitored for start up?
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7th Apr 2017 8:51am |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17435 
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No, that's the camshaft position sensor (needed at startup since the camshaft rotates once for every two revolutions of the crankshaft, and the ECU has to know which stroke the engine is on).
Correct operation of the crankshaft position sensor is essential for the operation of the engine, and failure of the crank position sensor is a common cause of complete engine stoppage problems on modern engines - the engine won't run without it. |
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7th Apr 2017 9:02am |
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| Caterham Member Since: 06 Nov 2008 Location: Birmingham Posts: 6300
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thanks for confirming BW.  by the way. I'm planning on getting my truck running sweet if it's the last thing I do. I know full well how beautifully it can run. after having another adapter shaft replaced recently I'm on a borrowed transfer box. Mine's off to be rebuilt and strengthened along with a kinda lsd in the middle, once back it'll be fitted to a new gearbox (and adapter shaft if there's any suggestion of wear), the rear diff is also be rebuilt with lsd and I'm having the rail sensor and vcv being looked at today as the engine seems to be hunting more regularly than ever on tick over at the moment (+/- a good 50 rpm which to me doesn't seem like much but listening to it, it sounds very wrong.
so another 8 weeks or so and there should be a big  from my corner. |
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7th Apr 2017 9:09am |
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| MadTom Member Since: 10 Sep 2013 Location: Olomouc Posts: 623  
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Just for info - on TD5 there is only crank shaft position sensor. There is not any sensor on cam shaft.
And for basic run TD5 needs only the crank shaft position sensor - to be able to run on idle. And gas pedal, to change the RPM form idle. "Drobek" = The Small One - Discovery 2, "Blufínek" = The Blue Thing - Defender 130, and for me at least Ford Mondeo  |
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10th Apr 2017 7:20am |
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| Swine&Small Member Since: 20 Mar 2017 Location: Norfolk Posts: 1223
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Hi Mad Tom
Thought Drobek was Czech for Breadcrumb 
S&S 1983 Series 3 Pick up in Marine Blue 1967 Morris Traveller 1966 Morris Convertible 2012 VW T5 Camper Quod Abundat Non Obstat. |
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10th Apr 2017 8:58am |
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| MadTom Member Since: 10 Sep 2013 Location: Olomouc Posts: 623
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Yes, you are right, Discovery 2 is a small car. Even Def 130 is a small car.
 "Drobek" = The Small One - Discovery 2, "Blufínek" = The Blue Thing - Defender 130, and for me at least Ford Mondeo |
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10th Apr 2017 12:35pm |
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