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Macpaul

Member Since: 26 Mar 2013
Location: SW Surrey
Posts: 439

2013 Defender 110 Puma 2.2 USW Loire Blue

TD5 ECU advice requested

Morning All,

I have a 2003 TD5 with the problem that on every run it goes into a semi-limp mode, that is, a flat throttle but not a full-on limp and no error codes are shown or recorded.

Having done lots of the usual stuff, MAF, MAP etc to no effect, I'm left with the possibility that there's something wrong with the ECU. Not common I understand but there we are and I'm getting near the end of my tether with this thing.

The possibility exists of buying one, part number NNN000120.

Mine is marked NNW500930 4195.

As I read the searches here, any NN ECU is re-codeable/flashable and should be a replacement for mine but before I start spending money, can anyone tell me if this is true?

Many thanks....

15th May 2013 11:58am

bob neville

Member Since: 30 Apr 2009
Location: Marbella
Posts: 3247

When you say have you done the usual things does that include the injector harness (or checking for oil in the injector harness) - red plug on ecu, disconnect etc ?

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 !

15th May 2013 12:10pm

Macpaul

Member Since: 26 Mar 2013
Location: SW Surrey
Posts: 439

Yes, injector harness has been done.

15th May 2013 12:28pm

big steve

Member Since: 24 Dec 2009
Location: hertfordshire
Posts: 2456

2015 Defender 90 Puma 2.2 HT Montalcino Red

Has it been remapped ? It may be over boosting 2015 2.2 tdci hardtop xs
3.2 conversion DONE 238bhp and 707nm torque and thats just the start ;-P
hybrid turbo in build -done ready to fit
ashcroft atb in transfer box
6 speed auto in build

15th May 2013 12:37pm

Macpaul

Member Since: 26 Mar 2013
Location: SW Surrey
Posts: 439

Yes, it's been remapped but has a boost box fitted.

It had the problem both before and after the remap.

I know the ECU is at the end of the list as far as solving the problem is concerned but I've:

1. Changed the MAF (genuine)
2. Cleaned the MAP
3. Changed the injector harness + cleaned out repeatedly
4. Had 5 new injectors after previous ones were tested and condemned.
5. Wound the wastegate right off

So does anyone got any info on the compatibility of an NNN000120 ECU with my existing NNW500930 part number?

Thanks

15th May 2013 12:48pm

LandRoverAnorak

Member Since: 17 Jul 2011
Location: Surrey
Posts: 11240

2013 Defender 110 Puma 2.2 USW Orkney Grey

Throttle potentiometer, maybe? Darren

110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak

"You came in that thing? You're braver than I thought!" - Princess Leia

15th May 2013 12:52pm

barbel jim

Member Since: 12 Dec 2012
Location: Northants
Posts: 1411

Macpaul wrote:
Yes, it's been remapped but has a boost box fitted.

It had the problem both before and after the remap.

I know the ECU is at the end of the list as far as solving the problem is concerned but I've:

1. Changed the MAF (genuine)
2. Cleaned the MAP
3. Changed the injector harness + cleaned out repeatedly
4. Had 5 new injectors after previous ones were tested and condemned.
5. Wound the wastegate right off

So does anyone got any info on the compatibility of an NNN000120 ECU with my existing NNW500930 part number?

Thanks

Sorry I don't want to sound rude, but who remaps a vehicle that is not running right ??? And hands it back as a finished job ??? So you paid £500+ for a map that dose not work ??

Did the tuner not have any ideas ?? Or was he too busy counting your hard earned ??

15th May 2013 1:03pm

excossack

Member Since: 22 Feb 2012
Location: North West
Posts: 5745

1999 Defender 110 Td5 SW Caledonian Blue

Fuel pressure dropping off?
Blocked air intake reducing air flow or turbo hoses getting hot and collapsing or expanding too much and not keeping the pressure up?
Any odd noises? 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock

15th May 2013 1:07pm

diesel_jim

Member Since: 13 Oct 2008
Location: hiding
Posts: 6041

Everyone seems to have mentioned the obvious things to check, but regarding the ECU's, yes, you'll need either an NNN500020 or NNN000120 for your defender.

Either can be reflashed to defender settings.

With thanks to Pete @ Bell autos, he's advised for a 10P engine (not sure what yours is... at 2003 it's probably a 15P) but for 10P the standard fuelling files are:

you can use, on an eu2 (10P) engine, NNN500020 or NNN000120

with NNN000120, use STHLE022 & STTLP009 (euro defender non A/C)

with NNN500020, use STHLE022 & STTLP010 (euro defender non A/C)

Looking on my nanocom map wizard, for later defenders

NNN000120 use svlne007 & svtnp005 (euro defender)

NNN500020 use svlne007 & svtnp006 (euro defender)

There's a couple of NNN000120's on ebay at the moment, i'm watching one as I need one for the project90. currently at about £130 with 4 days to go, so expect about £200 ish.

15th May 2013 1:42pm

Macpaul

Member Since: 26 Mar 2013
Location: SW Surrey
Posts: 439

LandRoverAnorak wrote:
Throttle potentiometer, maybe?

Replaced it already thanks.

15th May 2013 2:08pm

Macpaul

Member Since: 26 Mar 2013
Location: SW Surrey
Posts: 439

excossack wrote:
Fuel pressure dropping off?
Blocked air intake reducing air flow or turbo hoses getting hot and collapsing or expanding too much and not keeping the pressure up?
Any odd noises?

Fuel pressure checked and OK.

Air intake and turbo hoses checked and OK.

No odd noises. Sounds great actually.

15th May 2013 2:10pm

excossack

Member Since: 22 Feb 2012
Location: North West
Posts: 5745

If you think ECU, maybe one of the tuners might lend you one to test? 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock

15th May 2013 2:11pm

Macpaul

Member Since: 26 Mar 2013
Location: SW Surrey
Posts: 439

Quote:
Sorry I don't want to sound rude, but who remaps a vehicle that is not running right ??? And hands it back as a finished job ??? So you paid £500+ for a map that dose not work ?? Did the tuner not have any ideas ?? Or was he too busy counting your hard earned ??

Fair question and just the sort of reply I might have made but I'd rather not say at this stage as he's not given up.

I'm just looking at worst case.

15th May 2013 2:13pm

Macpaul

Member Since: 26 Mar 2013
Location: SW Surrey
Posts: 439

diesel_jim wrote:
Everyone seems to have mentioned the obvious things to check, but regarding the ECU's, yes, you'll need either an NNN500020 or NNN000120 for your defender.

Either can be reflashed to defender settings.

With thanks to Pete @ Bell autos, he's advised for a 10P engine (not sure what yours is... at 2003 it's probably a 15P) but for 10P the standard fuelling files are:

you can use, on an eu2 (10P) engine, NNN500020 or NNN000120

with NNN000120, use STHLE022 & STTLP009 (euro defender non A/C)

with NNN500020, use STHLE022 & STTLP010 (euro defender non A/C)

Looking on my nanocom map wizard, for later defenders

NNN000120 use svlne007 & svtnp005 (euro defender)

NNN500020 use svlne007 & svtnp006 (euro defender)

There's a couple of NNN000120's on ebay at the moment, i'm watching one as I need one for the project90. currently at about £130 with 4 days to go, so expect about £200 ish.

Yes mine's a 15P but from what I gather from your post, the NNN000120 would be OK for that .....?

15th May 2013 2:17pm

jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 7700

2011 Defender 110 Puma 2.4 USW Stornoway Grey

if you have a gen MAF was it mapped to a gen one? although doesnt account for it being wrong prior.

so 60psi in the fuel line then?

can you not just borrow a ecu and see how it goes. injectors wont be matched but it will run. Cheers

James
110 XS Utility
130 Puma Station wagon/camper (in the making)
90 Puma Hardtop

15th May 2013 2:26pm

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