ECU Reset

Talk about the 406's electrical system, what wires do what, how to add extra functionality, etc.

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mjb
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ECU Reset

Post by mjb »

Well I've done a few days driving after another ECU reset and I'm most intrigued at the result! Why? Because usually after resetting the ECU I'll give it a good hard drive for 20 miles or so covering the full range of the cars performance, but this time I didn't. In fact for the first couple of hundred miles I didn't take it over 2200rpm (my usual commute).

Well what's the difference? Well for some strange reason it's behaving more like a diesel than before! My economy's gone up by an average of 3.5mpg (up to 45.5mpg on my daily commute) and it's pulling a heck of a lot better at very low revs - you can happily accelerate away in 5th from as low as 1300rpm now without the usual deafening sound of a laboured engine. WTF? A lot of the time this week I just haven't been bothering about 1st because 2nd's just pulling beautifully. Must remember my clutch's health though...

Also interesting is the fact it doesn't seem as nippy at higher revs any more and disturbingly going anywhere over 3000rpm returns sub-10mpg (usually reserved for absolute flat-out driving)

So there you go - after unplugging your ECU, make sure you drive like you mean to go on!

Me? I think I'll be pulling the plug again very soon. The saving I'll make from the extra mpg is all well and good, but I just can't live without occasionally hearing that subtle song of the turbo 8) (plus I don't want "oops I'm late for work" to mean I run out of fuel half way!)
<steve_earwig> I think this forum is more about keeping our cars going with minimal outlay than giving our cars more reason to go bang
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Welly
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Post by Welly »

Nice one m,

I always thought all this reset stuff was a load of old bollocks, it probably is on the high revs scale but maybe works best is 'grandad mode', heh, whatever, if it works for you then carry on plodding. :cheesy:

I always understood that the 2.0T is more of a Torquey plodder anyways, no need to rev the thing.
Cars in my care:
2021 Kia Spottage 1.6 Pez Turbo Dual Clutch Gearbox Trickery
2013 Renner Twingo - donkey work
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scrapheap
1.8 8v
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Post by scrapheap »

I'm impressed you're getting 45mpg on your commute - that's eating into my range ( 2.1td ).

What does your commute consist of, and how would you describe your driving style ?
2.1TD LX Cat C
No longer in use, and SORNED due to..
Steering leaking.
Back door stuck shut.
MOT and Tax out.
Baby on the way, so now have a 405 Estate
Any offers for the 406 ?
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mjb
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Post by mjb »

scrapheap wrote:What does your commute consist of, and how would you describe your driving style ?
EXTREME grandad driving :)

2 miles at 30mph with 4 stops for lights. 50 miles by motorway (driven at indicated 60mph, usually in the slipstream of an artic lorry). 3 miles at however slow the central Manchester traffic is going (lots of stop-start).

The thing with the 2.0 turbo is it *really* doesn't like accelerating. As soon as you put your foot anywhere near the pedal, it's wanting to bleed your fuel tank dry. 0-30 even grandad style over 100 yds or so takes up more fuel than a couple of miles at 60mph cruise
<steve_earwig> I think this forum is more about keeping our cars going with minimal outlay than giving our cars more reason to go bang
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