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Cubflyer



Member Since: 25 Sep 2021
Location: Suffolk
Posts: 278
United Kingdom 1994 Defender 90 300 Tdi SW Arles Blue
Performance?? 1994 TDI300
Hi folk

I really know nothing about this subject so hope you'll bear with me.

As far as I'm aware my 94 Defender 90 has never had it's Injector's or Glow-plugs changed.

If I change them ... should/would I notice a difference in perforance?

OR ... "If they work - leave them alone?"

Many thanks

John

PS: If they should be changed ... what make are recommended? 2010 Defender 90 300Tdi CW (White/1994)
2021 Defender 90 300Tdi SW (Blue/1994)
Post #1011226 14th Oct 2023 7:19pm
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Chicken Drumstick



Member Since: 17 Aug 2020
Location: Near MK
Posts: 872
United Kingdom 
lol, glow plugs are only for starting when cold. They will make no difference to running.

Injectors.... maybe. But only if you have an issue. I'd say there is probably an 80-90% chance they are fine and changing them would make no odds. But there is always the possibility there would be a noticeable difference.

Do you have a problem with the vehicle?

If you want more performance, the Tdi's respond well to some mods. Big intercooler (FMIC) and a tweaked pump. You can even have a go yourself at home with some basic hand tools.
Post #1011239 14th Oct 2023 9:56pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17717
United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
Mileage?
Post #1011243 14th Oct 2023 10:41pm
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Cubflyer



Member Since: 25 Sep 2021
Location: Suffolk
Posts: 278
United Kingdom 1994 Defender 90 300 Tdi SW Arles Blue
Morning BW the milage is 155K 2010 Defender 90 300Tdi CW (White/1994)
2021 Defender 90 300Tdi SW (Blue/1994)
Post #1011249 15th Oct 2023 7:35am
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I Like Old Skool



Member Since: 23 Feb 2015
Location: Manchester
Posts: 842
United Kingdom 1994 Defender 110 300 Tdi ST Coniston Green
My 94 300tdi runs like clockwork and regularly hits 85-90mph. 175k on the clock and totally standard!

As far as I can tell the biggest thing (other than everything being well maintained) is to make sure timing is optimised during timing belt changes. I find the static setting is just the start and actually driving the vehicle then nudging the timing +/- 1 degree in either direction to find the sweet spot during test drives gives the best result. I would be a rich man if I had a pound for every time someone asks me how my Defender has been 'chipped/tweaked'.....

I could also make a similar amount of money from the number of people who swear I am running locking diffs Rolling with laughter

Recently at Dalton off-road site in the Lakes I had a bloke who just wouldn't accept it. Conversation was something like this.... "Ok, so you have open diffs, but they are locked really aren't they!"
Post #1011255 15th Oct 2023 9:01am
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Cubflyer



Member Since: 25 Sep 2021
Location: Suffolk
Posts: 278
United Kingdom 1994 Defender 90 300 Tdi SW Arles Blue
Thanks for your comments OS - appreciated as always Thumbs Up

I love my 90 but sometimes feel it's lacking "something" but can't say what! ...

ATB

John 2010 Defender 90 300Tdi CW (White/1994)
2021 Defender 90 300Tdi SW (Blue/1994)
Post #1011258 15th Oct 2023 9:11am
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Screbble



Member Since: 26 Apr 2015
Location: Lancashire
Posts: 2175
United Kingdom 2004 Defender 90 Td5 XS CSW Zambezi Silver
I may be way off track - but is it worth giving the fuel system an appropriate treatment - some injector cleaner?
Post #1011259 15th Oct 2023 9:22am
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Cubflyer



Member Since: 25 Sep 2021
Location: Suffolk
Posts: 278
United Kingdom 1994 Defender 90 300 Tdi SW Arles Blue
Hi Screbble - An interesting thought and one I'd never considered! - thank you!

I'm always skeptical of these additives ... can anyone offer their experiences having used them ...

Thanks

John 2010 Defender 90 300Tdi CW (White/1994)
2021 Defender 90 300Tdi SW (Blue/1994)
Post #1011282 15th Oct 2023 10:49am
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Barneyboy



Member Since: 19 Nov 2014
Location: Exmoor
Posts: 1631
England 1986 Defender 90 2.5 n/a Diesel ST Nato Green
Hi, not a Defender but I ran a 200tdi in my 1966 series 2 and every couple of months I would pour in a diesel injector cleaner, in my opinion it worked as I kept that for 6 or 7 years with that engine and it pulled like a train albeit lighter than a defender I believe this additive definitely helped, the engine had done from memory 175k when we removed it from my mates Discovery and I averaged around 9/10 k miles a year commuting, Camping and visiting my mum in Axminster regularly Thumbs Up cheers Paul
Post #1011400 16th Oct 2023 12:05pm
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Cubflyer



Member Since: 25 Sep 2021
Location: Suffolk
Posts: 278
United Kingdom 1994 Defender 90 300 Tdi SW Arles Blue
Hi Paul - Thanks very much for taking the time to reply.

Certainly thinking about doing it after reading a few reports ... it would be good to know how many others are doing it too.

All the best

John 2010 Defender 90 300Tdi CW (White/1994)
2021 Defender 90 300Tdi SW (Blue/1994)
Post #1011401 16th Oct 2023 12:08pm
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MercianRover



Member Since: 07 Apr 2022
Location: Culworth
Posts: 145
United Kingdom 1998 Defender 110 300 Tdi CSW Java Black
Garage I used recommended it - they have an diesel repair shop so I presume the advice was based on seeing vehicles where it was used and where it was not and practical observation of the injection parts on each.
Post #1011408 16th Oct 2023 12:30pm
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Cubflyer



Member Since: 25 Sep 2021
Location: Suffolk
Posts: 278
United Kingdom 1994 Defender 90 300 Tdi SW Arles Blue
Thanks MR ... Your comment is welcomed, now looking at various brands.

Any one care to share what they use/have used.

MTIA

John 2010 Defender 90 300Tdi CW (White/1994)
2021 Defender 90 300Tdi SW (Blue/1994)
Post #1011468 16th Oct 2023 7:40pm
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Barneyboy



Member Since: 19 Nov 2014
Location: Exmoor
Posts: 1631
England 1986 Defender 90 2.5 n/a Diesel ST Nato Green
Hi John, I’ve used STP and Wynns they both advertise to do the same job and I can’t say I noticed any difference between the two ie good results from both Thumbs Up cheers Paul
Post #1011471 16th Oct 2023 7:55pm
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Cubflyer



Member Since: 25 Sep 2021
Location: Suffolk
Posts: 278
United Kingdom 1994 Defender 90 300 Tdi SW Arles Blue
Paul ... thanks very much for taking the time to read my thread and reply.

ATB

John 2010 Defender 90 300Tdi CW (White/1994)
2021 Defender 90 300Tdi SW (Blue/1994)
Post #1011474 16th Oct 2023 8:09pm
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NickMc



Member Since: 01 Oct 2014
Location: Norn Iron
Posts: 1681
Northern Ireland 2006 Defender 90 Td5 HT Bonatti Grey
Turners recommend new injectors over 100/120K
Post #1011481 16th Oct 2023 8:32pm
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