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gazman

Member Since: 17 Aug 2015
Location: Liverpool
Posts: 652

td5 running rough, help with codes

Guys my 2003 td5 runs rough above 2500 rpm. Almost like a misfire but not quite. It os definitely not over boosting as I've done a live road test and the highest it got to was 204kpa and as I fitted a boost guage to make sure it happens even as low as 8 psi.
I'm beginning to think it's a fuel pump as it seems to happen at bigger throttle openings and rpm above 2500 - 2800 at revs lower than this it runs perfect.

It does have a tuning box fitted in parallel with the ecu to make the injectors open longer etc. But even with this removed it still does it. Changing the settings of the box moves the rough running slightly.
I have had whining noises from the pump so I suspect it is that and I've ordered a new pump. But before fitting it can anyone have a quick glance at the screens I've taken pics of and see if I've got another fault before I change it at the weekend.
The faults with the crank sensor cleared and I suspect they were from the old starter motor and not cleared as they didn't come back after a run. But I will check again before doing the pump.
Thanks.

Click image to enlarge

Click image to enlarge 2014 - current ..... 2003 defender td5 90 (my car)
2009 - current .... 2005 zx10r

17th Dec 2015 10:41pm

JWL

Member Since: 26 Oct 2011
Location: Hereford
Posts: 3443

To be honest, I'd be changing the injector seas and washers and giving the injector harness a spray up with contact cleaner first before changing the pump. Do those first and see what the difference is.

17th Dec 2015 10:45pm

gazman

Member Since: 17 Aug 2015
Location: Liverpool
Posts: 652

Forgot to mention. I've changed the injector harness, no oil in the red plug either. But the previous owner did have the problem and changed the harness 2 yrs ago.

Changed the maf as the other one was faulty and cleaned the map which was spotless before had too. The egr has been removed and the hoses are all silicone. Fuel filter as been changed but never gets hot as I seem to remember the last one did when I first got the landy.

I have washers and seals but have not fitted them yet as I've got no problems starting or raising oil levels which I understand are common symptoms of the washers and seals 2014 - current ..... 2003 defender td5 90 (my car)
2009 - current .... 2005 zx10r

17th Dec 2015 10:53pm

JWL

Member Since: 26 Oct 2011
Location: Hereford
Posts: 3443

I didn't have any change in oil levels, not the faintest whiff of diesel from the filler cap but a noisy pump and near enough overnight mine lost all power above 2000 revs, not the best of things to happen when on a camping holiday in the middle of Wales. Nothing was obvious on the Nanocom, the pump was OK, fuel filter changed along with the injector harness. All these steps improved things slightly but didn't cure it. I changed the seals and washers and instant kharma, I was dubious but it worked.

17th Dec 2015 11:04pm

amondeggs

Member Since: 06 Mar 2011
Location: Telford
Posts: 452

Ive had same Symptoms recently and your answer will be to replace copper washers and o ring seals. Only use. Genuine parts

I was lucky enough to borrow proper tool to remove injectors. It makes the job very easy

17th Dec 2015 11:30pm

derbywill

Member Since: 25 Mar 2010
Location: Derbyshire
Posts: 559

I'd be looking at the high speedcrank sensor fault, if the rocker cover gasket is leaking it can get in the sensor plug and short out.
Will 2005 90 XS
1954 86'' Series 1 tilt
1968 88” 2A 200tdi
2002 110 Hardtop

17th Dec 2015 11:59pm

ian series 1

Member Since: 17 Nov 2014
Location: south
Posts: 3127

2008 Defender 90 Puma 2.4 CSW Bonatti Grey

I've just fitted some injector seals on a customers rough running TD5,
No oil level issues, just poor performance.

It was on 172,000 miles, and the copper washers speak for themselves really.
Instant transformation on running.

For what it costs, and being a straight forward job I would highly recommend this as a good starting point.

Click image to enlarge

Also 3 out of 4 glow plugs were not working.

The codes you have are usually thrown up, delete them, run it and read them again. 80" 80" 86" 88" 90"

Wanted, Forward Control Anything considered.

18th Dec 2015 6:53am

gazman

Member Since: 17 Aug 2015
Location: Liverpool
Posts: 652

I did the seals today. The copper washers were worn on all but one injector which was a slightly different shade.
Looks like it's had a injector swap before I got it.

It's still feels and sounds like it's dropping onto 4 cylinders above 2500rpm even with the new seals etc.
Not completely wasted my time as they would have needed doing soon anyway!

Just need to get to the bottom of this. I have a brand new vdo fuel pump if required but I think I will have the ecu and injector codes checked next 2014 - current ..... 2003 defender td5 90 (my car)
2009 - current .... 2005 zx10r

19th Dec 2015 5:06pm

derbywill

Member Since: 25 Mar 2010
Location: Derbyshire
Posts: 559

Have you look at your crank sensor? As there is a logged fault for it.
Regards

Will 2005 90 XS
1954 86'' Series 1 tilt
1968 88” 2A 200tdi
2002 110 Hardtop

19th Dec 2015 5:13pm

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