kurgan · Aug 18, 2012

I have (as some of you are aware) a 1998 jap import disco V8 (VIN VA744719) and I am changing to UK fuelling map and need to change the tune resistor from red map 180 ohms to white map 3900 ohms. I have been told that MAF will need changed via multimeter.

Can anyone advise on how about doing this and if I take to a garage (more than likely), would they know how to do this?

Currently getting rubbish MPG and was told it is was because it was over fuelling as it was on the wrong fuel injection map (Australasia and far east).

Regards
Craig

wolf · Aug 19, 2012

kurgan said:
I have (as some of you are aware) a 1998 jap import disco V8 (VIN VA744719) and I am changing to UK fuelling map and need to change the tune resistor from red map 180 ohms to white map 3900 ohms. I have been told that MAF will need changed via multimeter.

Can anyone advise on how about doing this and if I take to a garage (more than likely), would they know how to do this?

Currently getting rubbish MPG and was told it is was because it was over fuelling as it was on the wrong fuel injection map (Australasia and far east).

Regards
Craig

You need to get a hold of Mark Adams of Tornado (his own company) - he will sort this out for you in no time.

POAH · Aug 19, 2012

define rubbish. overfueling would show on the plugs and smell from exhaust. you only need to change the resistor

kurgan said:
I have (as some of you are aware) a 1998 jap import disco V8 (VIN VA744719) and I am changing to UK fuelling map and need to change the tune resistor from red map 180 ohms to white map 3900 ohms. I have been told that MAF will need changed via multimeter.

Can anyone advise on how about doing this and if I take to a garage (more than likely), would they know how to do this?

Currently getting rubbish MPG and was told it is was because it was over fuelling as it was on the wrong fuel injection map (Australasia and far east).

Regards
Craig

kurgan · Aug 19, 2012

POAH is this easy to do? Or is it defo a garage mechanic job?

POAH · Aug 20, 2012

kurgan said:
POAH is this easy to do? Or is it defo a garage mechanic job?

turn engine off, get to ECU, swap resistor, turn engine on. you may have to disconnect the ECU from the loom as you may go into default mode.

the resistor is between pins 5 & 27 and the wirecolour is what lets you know what type it is.

It shouldn't be any real problem for you

kurgan · Aug 20, 2012

POAH said:
define rubbish. overfueling would show on the plugs and smell from exhaust. you only need to change the resistor

Rubbish mpg 50-60 miles from 30 litres of reg unleaded.

Can you put up pics of what I should be looking for beside ecu? I'm not a wires/soldering guy.

POAH · Aug 20, 2012

so under 10mpg is pretty bad lol

Mr Noisy · Aug 20, 2012

Forgive me but why would you be getting such poor mpg purely from tune resistor?

kurgan · Aug 20, 2012

Mr Noisy said:
Forgive me but why would you be getting such poor mpg purely from tune resistor?

Because I have been told that I am running on the wrong fuel map and need to change resistor to uk specification, from 180 ohms to 3900 ohms.

I'm not a tech guy just want a smooth running V8.

Mr Noisy · Aug 20, 2012

But my point is that are they expected to run ****e over there and fine here?

Tune resistor should alter emissions control etc but I would have thought it would/should run properly on all four resistors!!!

POAH · Aug 21, 2012

Mr Noisy said:
Forgive me but why would you be getting such poor mpg purely from tune resistor?

if a non-cat model runs the cat map it runs rich - or if its in limp home mode it will run rich. if the map is not that different between UK CAT and aussie then it will not bemuch of a problem.

disconnect the ECU from the loom and then reconnect and see if that makes a difference

kurgan · Aug 22, 2012

wolf said:
You need to get a hold of Mark Adams of Tornado (his own company) - he will sort this out for you in no time.

Thanks he is going to do the business.

dirtydiscov8 · Aug 23, 2012

How did you get hold of Mark? I've got one of his fuel chips i need re programming

kurgan · Aug 25, 2012

dirtydiscov8 said:
How did you get hold of Mark? I've got one of his fuel chips i need re programming

Sent you a PM

Craig

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Coming in your ears.

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