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LandymanStefan

Member Since: 30 Aug 2017
Location: Surrey
Posts: 881

Will a td5 defender run with an msb discovery ecu?

Since ive recently had my ecu partially fail on me and unable to read the signal from the cps sensor correctly its made me slightly concerned about solo overlanding in the alps with the car. Thankfully mine died on the driveway.

I recently fitted a nnn discovery ecu to replace the damaged one and even with the discovery fuel map the car runs fine. Ive not yet copied the map from the old ecu yet as my sd card hasnt arrived.

I was wondering if i pick up a cheap £50-70 MSB discovery ecu to have as a spare on these trips will it run well enough to get me out of trouble in the event of failiure?

29th Mar 2020 9:39am

Mdm

Member Since: 11 Sep 2013
Location: Sunny Lancashire
Posts: 1632

there are a few things that are different such as the temp sender

plenty of folk can rewrite them to defender spec

as these ecu get older more are failing without warning ive had 2 fail last yr on a 2000 td5 and a 2004 td5. neither good be reapired. im running a nnn disco one on my td5 that was reworked a mapper in stockport

29th Mar 2020 10:27am

benniferj

Member Since: 20 Oct 2016
Location: Basingstoke
Posts: 361

Yes, you could do well by carrying a spare ECU.
You'd do even better to test it before putting it in the spares box and coding your injectors to it etc. Insta: @thebenjordan4x4

29th Mar 2020 12:57pm

LandymanStefan

Member Since: 30 Aug 2017
Location: Surrey
Posts: 881

Thats good, i'll keep an eye out for a cheap one and test it if i do get one.

I think i just need to make sure its from a manual disco right?

29th Mar 2020 1:14pm

diesel_jim

Member Since: 13 Oct 2008
Location: hiding
Posts: 6112

It will run yes, but in standard disco format, the temp guage works back to front, and the throttle response is VERY sensitive... horribly so, but at least it'll get you home.

2nd Apr 2020 6:31pm

MadTom

Member Since: 10 Sep 2013
Location: Olomouc
Posts: 637

For emergency use, any TD5 ecu will work. Just need IMO pairing made. If you set injector codes, it will be better. With IMO paired, you just plce the ecu in car, no need fo diagnostics.
Also need correct gas pedal set, in case of 3 ways set in ecu and 2 ways placed in car, it will only idle. "Drobek" = The Small One - Discovery 2, "Blufínek" = The Blue Thing - Defender 130, and for me at least Ford Mondeo

3rd Apr 2020 6:34am

LandymanStefan

Member Since: 30 Aug 2017
Location: Surrey
Posts: 881

Great thanks for the replies, i’ll keep an eye out for a cheap one. Of course only for energency use. When I got my replacement for my faulty one it was from a disco and I did drive it with the disco map on for a little while and it did kangaroo at low revs but I have since put the def fuel map onto it now.

I just want a cheap spare one to have in the car for if the worst does happen when I’m up a mountain somewhere but hopefully i’ll never need it.

3rd Apr 2020 9:30am

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