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Nobby

Member Since: 09 Aug 2012
Location: Wiltshire
Posts: 444

2010 Defender 90 Puma 2.4 CSW Santorini Black

Puma losing power when changing gear

Firstly did post yesterday in another thread but thought it may be better here?
Yesterday morning, all fine driving along outside lane of the M4 traffic building up so slowed down and had to change down from 6th....and nothing, other than lots of cars rapidly hurtling towards me. On with hazards, pump the accelerator, nothing then it kicks in. So as my backside eases and the knotted feeling in the stomach recedes, I accelerate away, change up and nothing. As before it kicks back into life, so with throttle back I lane swap into the near side and all seems okay. As I hit all the traffic near Heathrow back it comes, instantly decide to get off motorway as luckily at a slip road. Pull off switch off lift the bonnet and all seems okay except small leak of oil at the vacuum pump, obviously that needs addressing but shouldn't be the lack of throttle issue.
Gently eased it up the road as I was just a mile from work and a better place to arrange assistance. LRA attend within an hour of calling, diagnose fuel pressure not being maintained at idle, did question if fuel was tainted, but thought may just be a sensor fault, plus agreed vacuum pump needed replacing. Courtesy car dropped off, AA picked it up and it's now with Dealer.
Well today had the call, just after 1600, "we've looked at the 90 and there's nothing wrong with it",

Said they took it on a test drive and it went really well

I asked what about the leak on the vacuum pump, oil may be a give away

silence from the dealer, well I pointed out that I witnessed the LRA Technician and saw the fuel pressure reading. Went on to explain the symptoms above. I then had a brainwave

why don't you get your technician to speak with me

Still waiting on the call back and perhaps naively I am assuming they will notice the pump leaking and fix that

Watch this space........ _______________________________
Puma Defender 90

8th Oct 2013 7:32pm

Nobby

Member Since: 09 Aug 2012
Location: Wiltshire
Posts: 444

Update

Well, having not heard from the Dealer by 1200, I decided to call them, after being on hold long enough to make a cup of tea, eat some lunch and nearly empty the cup a human voice answered......

So as I start to speak a voice says, sorry you need Service....I rang service, well this isn't I'll put you through......finish my tea. Voice returns and says are you the same man? Yes, sorry Service must be busy, I'll take you details and someone will call you.

Me being the believing sort, or perhaps stupid happily waits. Once the clock strike 1400, I feel time has ticked by enough and perhaps I should drive to them, so I left London and drove straight to Reading, expecting a call on route, you never know.
Met the service Advisor, not a great start from my point of view, seems I should wait for a call

not quite in your face "why are you here" but definitely not happy with the face to face approach......
On a technical front they can't find any fuel fault, ran the engine at idle for 2 hours without any pressure issues. Explained the issues again, LRA didn't leave the blue copy of the fault report. I gave them my copy and they are going to pass it to the technician on a positive note they did fix the vacuum pump as they found the hose clamps loose. They also found another issue relating to a "pump" leaking oil and parts were on Order.
So I'm still driving around in a RRS but no nearer any solution to the fuel problem!

_______________________________
Puma Defender 90

9th Oct 2013 3:28pm

Nobby

Member Since: 09 Aug 2012
Location: Wiltshire
Posts: 444

Update 2

Well I had the call this afternoon, "your land rover is ready for collection. We've cleaned and it's parked waiting for you". Unfortunately in a meeting so had no more to go on, was fixed what did they find.
So off down the road from London, arrived there it was all clean and ready to go. Spoke with the lady from Service and they found the following;
Supplied and fitted new transfer shaft seal
Supplied and fitted new front shoes and seal
Cleaned vacuum pump
No other codes present, they could not find a problem with the fuel system or replicate it. They found a couple of issues I was unaware of and all under warranty. So I'm none the wiser. _______________________________
Puma Defender 90

11th Oct 2013 5:47pm

theorangebandit

Member Since: 03 Jun 2013
Location: Stowmarket
Posts: 862

Vacum piping is something that can give aultitude of bizzare faults. I once chased a fault for 2 weeks on a 300tdi and it Was the diaphram in the crank case breather/cyclone breather

The repair they did on your vaccum pump could solve it . If it hasnt your fault could lie within the induction system.

Have you had a chance to fully test your defender after its return?

11th Oct 2013 6:04pm

diesel_jim

Member Since: 13 Oct 2008
Location: hiding
Posts: 6089

Re: Update 2

Nobby wrote:
Supplied and fitted new front shoes and seal
.

I hope to god they didn't mean brake shoes!

11th Oct 2013 6:29pm

Nobby

Member Since: 09 Aug 2012
Location: Wiltshire
Posts: 444

theorangebandit, I haven't really tested it, traffic was backed up through Reading and it's the first thing I'll do tomorrow.

diesel_jim, I don't know! as service just read the pro-forma invoice and I was more concerned over the "no fault found", on why it was there in the first place. Just posted it without thinking.......now I'll need to have a good look in daylight. _______________________________
Puma Defender 90

11th Oct 2013 6:59pm

Nobby

Member Since: 09 Aug 2012
Location: Wiltshire
Posts: 444

Update 3

Well drove it over the weekend no problems, then again 10 miles at most. All okay.
So today off up the M4 and just as I hit the elevated section......yes it lost power when changing down, as before no hint of a problem, change down into gear and nothing

Busy so didn't call the garage but not to worry they promised to call me.....

so I'll deal with that tomorrow now. Only dropped out twice on the way back, perhaps I can be a glass half full man and take that as an improvement

_______________________________
Puma Defender 90

14th Oct 2013 6:22pm

SGoggin

Member Since: 04 Jul 2009
Location: Australia
Posts: 19

Was the weather hot?
What does your temperature gauge show when this happens?
Were you driving in 6th gear - I assume yes.

I've seen a few reports where the puma goes into limp mode due to overheating, when the Cylinger Head Temp exceeds 110C and recovers in a second or two.

Partial workaround is to use 5th gear instead of 6th as that increases engine rev's and therefore the amount of cooling air through the radiator.

15th Oct 2013 2:19am

Nobby

Member Since: 09 Aug 2012
Location: Wiltshire
Posts: 444

SGoggin, temperature gauge sat in the normal middle range, no change, weather was only about 14 and yes in 6th gear. _______________________________
Puma Defender 90

15th Oct 2013 8:13pm

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