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Ziggy Ghana



Member Since: 01 Nov 2016
Location: Accra, Ghana
Posts: 5
2007 Defender 110 Puma 2.4 CSW Chawton White
Puma Engine "Pull" Problem in 6th Gear
I have a Defender with 2.4L Puma engine 2007 model with mileage just under 40,000km and I've been miserable for more than a year because I have been unable to solve the problem with "pull" in 6th gear. The problem is as follows:

1) The 5th gear behaves normally with a top speed of 110km/h at 3500rpm. When 6th gear is engaged, the rpm drops to 2000 and then the rpm only builds very slowly. The vehicle seems very lethargic or even impotent in this gear. A maximum rpm of just over 3000 can be reached at a speed of 120km/h. The vehicle just doesn't want to do more than this and pressing the "pedal to the metal" has no effect.

2) The 6th gear lacks power and is not responsive making overtaking at speeds above 110km/h very dif ficult. Before this problem came about, the vehicle could reach speeds of 130-140km/h with full responsiveness in 6th gear.

I have tried the following, but with limited success:

a) EMU has been recently changed because previous one was damaged.
b) The fuel tank was recently cleaned because of the fuel gauge not functioning at all. The fuel tank was extremely dirty, even though fuel gauge rarely went below half gauge and a diesel fuel additive was dosed into the fuel. The fuel pump was changed as a part of the cleaning of the tank even though it was functioning properly.
c) The exhaust was producing normal emissions given the age of vehicle, but I decided to change all the injectors in the hope that it might solve the "pull" problem, but there was no improvement.
d) The turbo unit was changed again in the hope that this would solve the problem. There was a small improvement in "pull".

I am very frustrated because at the Land Rover service workshop there are no errors showing on the diagnostics machine. I would appreciate any advice on what things I should look at in order for the vehicle to get back to driving normally.

Thank you.
Post #574816 1st Nov 2016 7:35pm
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bm52



Member Since: 04 Apr 2010
Location: Kent
Posts: 2189
United Kingdom 2014 Defender 110 Puma 2.2 XS CSW Havana
I had a similar problem. It was a small tear in a turbo hose that only opned up under load and only noticable in 6th when cruising at lower revs using torque.
Post #574819 1st Nov 2016 7:45pm
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Ziggy Ghana



Member Since: 01 Nov 2016
Location: Accra, Ghana
Posts: 5
2007 Defender 110 Puma 2.4 CSW Chawton White
Thank you bm52 for the help. When I ordered the turbo unit I asked the supplier in the UK to supply all hoses needed for the connection, but the supplier failed to do so. The supplier also mentioned possible tiny tears in these hoses.

I will try and find the part numbers for all the turbo hoses and order them. I'll let you know what happens.
Post #574820 1st Nov 2016 7:55pm
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Ziggy Ghana



Member Since: 01 Nov 2016
Location: Accra, Ghana
Posts: 5
2007 Defender 110 Puma 2.4 CSW Chawton White
bm52 I will checked intercooler hoses and they are fine.

Please let me know what other things to look at. Does anybody else have any ideas?
Post #577594 13th Nov 2016 8:22pm
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GREENI



Member Since: 22 Aug 2010
Location: staffs
Posts: 10380
United Kingdom 
Ziggy, have you actually taken the hoses off to look at them? bm52 is right, they open up under pressure and difficult to see anything when they're fitted.
Post #577609 13th Nov 2016 8:52pm
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Dieselhead



Member Since: 21 Oct 2012
Location: Pulborough. West Sussex
Posts: 552
What about the pressure relief valve on the end of the fuel rail Chris

2008 XS 110 2.4 Utility. Tonga Green
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Post #577795 14th Nov 2016 7:30pm
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Ziggy Ghana



Member Since: 01 Nov 2016
Location: Accra, Ghana
Posts: 5
2007 Defender 110 Puma 2.4 CSW Chawton White
Thanks for the contribution Dieselhead.

I will send the vehicle to workshop tomorrow. I will take pictures of hoses for this group to show evidence of the state of the hoses.

Dieselhead, I will also let the workshop mechanic trouble shoot the pressure relief valve at the end of fuel rail as you have suggested.

Look forward to getting some results this week. I will let you have the feedback guys.

Thanks again for all the ideas. Thumbs Up
Post #577828 14th Nov 2016 8:51pm
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Ziggy Ghana



Member Since: 01 Nov 2016
Location: Accra, Ghana
Posts: 5
2007 Defender 110 Puma 2.4 CSW Chawton White
I got the car back today with no change. All the hoses were removed, checked and replaced and then re-tested with engine revved.

I am a bit frustrated. I also have a "hard clutch" problem as well which makes in traffic driving not enjoyable.

Can anyone recommend a workshop in South Africa which specialises in and has extensive expertise with Defender repairs as well as overland accessorisation. I'll think of shipping the car there for repairs and an extended holiday. I' appreciate any advice and recommendations.
Post #580345 25th Nov 2016 10:15am
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Naks



Member Since: 27 Jan 2009
Location: Stellenbosch, ZA
Posts: 2638
South Africa 2010 Defender 90 Puma 2.4 SW Alpine White
Ziggy, you can use LandyWorx in Joburg. One of the best LR indies in ZA Thumbs Up

http://www.landy-worx.co.za/ --
2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
2015 Range Rover Sport V8 Supercharged



Defender Puma Workshop Manual: https://bit.ly/2zZ1en9
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Post #580351 25th Nov 2016 10:48am
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xpertoftheseas



Member Since: 05 Jan 2016
Location: Salisbury, Wilts
Posts: 164
United Kingdom 2014 Defender 110 Puma 2.2 XS CSW Aintree Green
Ziggy Ghana wrote:
I got the car back today with no change. All the hoses were removed, checked and replaced and then re-tested with engine revved.

I am a bit frustrated. I also have a "hard clutch" problem as well which makes in traffic driving not enjoyable.

Can anyone recommend a workshop in South Africa which specialises in and has extensive expertise with Defender repairs as well as overland accessorisation. I'll think of shipping the car there for repairs and an extended holiday. I' appreciate any advice and recommendations.


Wow. You have spent a whole lot of money looking for this fault and no joy. The good thing is you have ruled out a lot of the obvious.

It would seem extremely strange to me that you are only experiencing this in 6th gear. If the truck has had dirty fuel previous to you owning it then you would have no idea how much power the truck should have if being run on purely good fuel. I would suggest that in general you are not getting the full power or torque in any gear, its just that 6th would show it more due you the higher powers and torque needed to drive this ratio.

First - fuel pressure! Dirty fuel will catastrophically ruin the high pressure pump so you need to get this measured at full load. This means in 5th gear 2000rpm foot to the floor and same in 6th if you can get it there. Post the pressures.

Second. Fuel rail pressure sensor. These can get blocked and damaged by dirty fuel and give the wrong readings to ECU (ie if your sensor is reading 500bar when engine is off then possibility is that ECU is getting 500bar more reading causing ECU to demand a lower (wrong) pressure from the pump)

Third. Get it on a dyno. This will show you what it is outputting to the wheels and will confirm your concerns.

Fourth (and to eliminate the last obvious) check accelerator movement is not fouled by carpet etc and moves full span to mechanical stop)

All of your posts would suggest fuel is the problem so I would highly recommend you have some investigative works done here. Common rail engines need very clean fuel and any dirt can quickly damage the HP pump, flow control valves, sensors and injectors.

Let us know how you get on. My 10th Land Rover, but my first Defender.
Post #581006 28th Nov 2016 12:47am
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Ferdinando



Member Since: 05 Apr 2015
Location: Lisbon
Posts: 4
Portugal 2007 Defender 110 Puma 2.4 DCPU Galway Green
Hi,

i have a similar problem, i just replaced the VCV valve, cleaned the tank, fuel filter change, MAP sensor replaced, but still the same. i even took out the snorkel and checked the air filter.

i think itīs not just in 6th gear, but it becomes more perceptive under pull in 6th.

best regards
Post #582123 2nd Dec 2016 11:18am
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Wild Card 90



Member Since: 03 Dec 2014
Location: Gerlingen
Posts: 1060
England 2012 Defender 90 Puma 2.2 SW Indus Silver
Ziggy,
it seems pretty clear that your Puma just isnīt producing the 120 or so hp that it should. You have covered many of the issues that will strangle it and cause a loss of power. Induction, injection, turbo. Does it use or lose oil? In view of the dirty fuel (fuel tank, pump, injectors) you mentioned, could it be suffering from a semi-blocked cat or DPF?
Stephen 1998 Tdi 90 SW,
2008 Td4 90 SW,
2012 2.2 90 SW,
2" raised Trailmaster/Terrafirma
Heavy Track Raids, 255 MTīs,
Recaro CSīs, anorak, wellingtons
Post #582172 2nd Dec 2016 1:51pm
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