 | Home > Puma (Tdci) > Intermittent power loss when driving. 2.4tdci |
 
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 19578  
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How did you check the UJ’s? Was the fuel pump a new complete unit? Diesel$ Live$ Matter. ⛽️🛢️👨🔧🧰⚙️ RED, WHITE & BOOST! 🇬🇧
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20th Feb 2024 10:20pm |
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| Defender du Member Since: 20 Feb 2024 Location: Wales Posts: 11  
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Pump was a complete unit, checked ujs by hand for play. It feels like fuel starvation and it just stutters and clunking noise.
Only does it when warm after say 30 miles. |
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20th Feb 2024 10:25pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 19578
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VCV (on the fuel pump) can cause issues with no codes, especially if there is any kind of possible fuel contamination. (Does it idle nicely? If not when cold then it could be it). Even more likely if it cuts out.
UJ’s can be really difficult to tell their state, I checked mine when I had problems with one bearing cup and didn’t notice anything, went through an MOT and it wasn’t noticed there was a failed bearing cup. I knew something was still up, took it off (the props) and then it was evidently clear a single bearing cup had failed. On a 90, the rear most UJ on the rear prop tends to be a favourite, at least on mine this was the one that went. In situ they can be difficult to tell if there is an issue, sometimes it’s only a single bearing of the four. You can only tell properly by taking it off. A little light lube like 3in1 oil on the turbo actuator pivot points won’t do any harm if you have any, worth doing anyway. When was the MAF and MAP sensors last cleaned?  Diesel$ Live$ Matter. ⛽️🛢️👨🔧🧰⚙️ RED, WHITE & BOOST! 🇬🇧 |
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20th Feb 2024 10:41pm |
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| Defender du Member Since: 20 Feb 2024 Location: Wales Posts: 11
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Thanks for the replies Steve, maf and map last week new parts fitted. Ticking over fine thats why it had the pump eratic tickover loss of throttle response and she finally did not start.
I was thinking vcv but with it only happening at speed and not tickover I thought maybe not. |
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20th Feb 2024 10:46pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 19578
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How old is the clutch? Sticking turbo actuator can cause power loss and limp mode but not specifically MIL or DTC, or could record a DTC but no other sign.
Though it is not likely to sound mechanical, more power loss. Flywheel and clutch spin at speed, an unbalance there I.e. a clutch spring fell out could cause a judder. Flywheels tend to be pretty resilient. Failing VCV does drop off power in high gears such as 5th and 6th or at 50mph plus, that does create a situation that seems to be fuel starvation, idle is not easy to tell and can still start fine. Eventually they just cause engine to cut out, usually at low revs without notice. One of the biggest signs I think of VCV failing is if you are driving on a slight uphill incline in say 6th, and you have to drop down to 5th even though you are giving some throttle. Feels as if you are towing heavy, but you are not doing so and it feels as if the power is gradually dropping off and you need to drop a gear to keep it going. Rough idle is generally only noticeable sub zero, but is not always that pronounced, I found it was the lack of power that was most noticeable in high gears. Perhaps some live diagnostics of the injectors and fuel pump performance might be the way to go to see how things are looking there. Might be worth checking the air filter, to see if it’s heavily soiled or damp, just a possibility. Also perhaps security of transfer box flanges and diff flanges, though you’ve probably had a look at - a juddering is normally a kind of driveline imbalance somewhere. Diesel$ Live$ Matter. ⛽️🛢️👨🔧🧰⚙️ RED, WHITE & BOOST! 🇬🇧 |
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21st Feb 2024 12:24am |
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| Defender du Member Since: 20 Feb 2024 Location: Wales Posts: 11
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Clutch has done 125k but no sign of slipping even with trailer, but is having a new lof clutch kit today and ourput shaft.
The landy kept popping clips on the adaptor for the slave cylinder causing the pedal to stick to the floor. Not sure if this is related to the clunk and judder, I put a new clip on the first time and it was solid 2 weeks and it dropped clutch fluid again. Due to towing a lot in winter I told the garage to change all clutch parts. Flanges are fine. |
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21st Feb 2024 8:03am |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 19578
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See how that goes, it may be that which is causing it.
If a spring happens to be missing from the clutch friction plate, that in its self can cause imbalance. Diesel$ Live$ Matter. ⛽️🛢️👨🔧🧰⚙️ RED, WHITE & BOOST! 🇬🇧 |
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21st Feb 2024 11:13am |
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| hank Member Since: 12 Sep 2016 Location: South Wales Posts: 2231 
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Definitely replace the VCV. I would put money on it being the culprit.
I've received genuine DENSO parts from LR Parts - link below (no affiliation). Be sure to select the DENSO option from the drop down. https://www.lrparts.net/lr009837-fuel-vapo...stock.html > 110 XS Double Cab > Instagram @simonlanemind |
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21st Feb 2024 11:36am |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 7687 
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handbrake drum warm? Cheers
James 110 XS Utility 130 Puma Station wagon/camper (in the making) 90 Puma Hardtop |
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21st Feb 2024 11:58am |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 19578
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VCV does some very strange things when it goes bad for sure, don’t suppose there is crud in the handbrake drum? Diesel$ Live$ Matter. ⛽️🛢️👨🔧🧰⚙️ RED, WHITE & BOOST! 🇬🇧
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21st Feb 2024 12:38pm |
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| Defender du Member Since: 20 Feb 2024 Location: Wales Posts: 11
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Thank you fpr the replies, will check handbrake drum, once I get it back and keep you posted👍
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21st Feb 2024 12:59pm |
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| Defender du Member Since: 20 Feb 2024 Location: Wales Posts: 11
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Just picked landy up, new clutch bundle and output shaft fitted!
The splines on the output shaft were worn and the bearing on the engine side of the clutch was badly worn.(springs were fine) Time will tell if this was the cause. |
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22nd Feb 2024 6:47pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 19578
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Diesel$ Live$ Matter. ⛽️🛢️👨🔧🧰⚙️ RED, WHITE & BOOST! 🇬🇧 |
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22nd Feb 2024 7:19pm |
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| Defender du Member Since: 20 Feb 2024 Location: Wales Posts: 11
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Been out today LOF clutch feels fantastic not experienced the surging/fuel starvation or drive yet, but there is a slight heitation when accelerating, tickover is fine not eratic like the last time.
Landy is smoking (whitish) a little more than usual when ticking over and in the mornings on cold start does this sound like a VCV even if tickover is fine? |
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24th Feb 2024 5:57pm |
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