Thread: Remapping EU2 motors - a word of warning

I was wondering this also,

I think if you stay with an eu2 map it should be OK,but then you lose some of the eu3 map benefits, but retain the ease of remapping,personally I think whether you remap or not,a nanocom is very useful with these vehicles.

cheers james

Originally Posted by Disco Muppet

So, to go from MSB to NNN do you have to do the 4 wire swap or not?

I'm guessing you didn't read the thread.

The short version:

There are several "ghost faults" that were supposedly "normal" when upgrading from MSB to NNN on an EU2.

These faults are actually caused vendors supplying a remap based on an EU3 base map which expects an ambient temperature input from the 4-wire AAP which isn't present in the 3-wire AAP. The fault is basically the ECU reporting a missing input from a sensor, and isn't a "ghost fault".

This essentially means you have two choices for a "fault code free" remap.

- Ask the remap vendor to supply an EU2 remap to suit your engine and the standard 3-wire sensor. If they do this you won't get any "ghost faults".

- Ask the remap vendor to supply a modified EU3 remap and fit a later air-box lid and 4-wire sensor to suit the requirements of the EU3 map. If you are going to the trouble of doing this, you should also consider updating to a 3 way throttle pedal.

I'd only go for the second option if you were dealing with Jose and you need to let him know this is what you are doing. It adds at least $200 to the cost and leaves you with no easy way to swap back to an EU2 map without messed up sensor readings.

cheers
Paul

Hi all,

Dont forget something very important to... The EU2 engines only have 1500 bar pressure injectors and the EU3 have 1750. The tuner must work on the map having this in consideration.

Regards

Some time out of this forum, and the car without changes (only new wheels).

In order to search the more perfect way to make an EU2 remap, is the remap of the original MSB the best way ? I currently have an EU2 running on a NNN000120, with a 3 pin AAP, and it performs good, but the AAP reads with a 8% o error: on a 101.8Kpa real, it reads 92.4Kpa. Bad sensor, perhaps. I have on mind to send the map and the MSB Ecu, and make the remap on it. Do you recommend that, or I will not see any difference of performance ?

Best regards to all.

There are two maps that are suitable for a NNN000120 and EU2 D2:

sthde021-sttdp009 (European)
sthdr009-sttdp009 (ROW)

Land Rover wrote suitable maps for EU2 motors when the NNN ECU's were introduced. They should be functionally identical to the equivalent MSB map so this would be the best starting point.

If you want to remap a MSB ECU there are technical challenges. The memory is one time programmable so needs to be replaced with a flash memory chip. Once that is done you'll be able to reprogram the chip fairly easily with via the BDM interface but it will likely require a bit of messing around to get it working.

cheers
Paul

Thank you Paul. I currently have a sthde021-sttdp009 on the NNN0000120 and have the original MSB for an emergency or recovery. In your opinion the MSB will not work best than the NNN with the same map ? Does not pay the effort ?

There should be no functional difference between NNN with correct map loaded and the MSB ECU.

You could try swapping in the MSB ECU to check the AAP reading is the same. The map you have loaded will have the correct information for the three wire AAP so that would be the last thing I'd be worrying about.

The MSB will require a fair bit of effort unless you are happy to send to a tuner for them to load a map.

cheers
Paul

Many thanks, If there is not any advantage I will center my atention to correct the read error of my AAP.

When I have installed the new 3 pin AAP, perhaps the total length of the cables is now superior of 20 cm. 20 cm of cable could make a difference of reading of any % or it is irrelevant ?

Markdeb: you private messages are not allowed.