C20XE ECU perm live

[Iain]

Is it bad that I cut the +ve to my ECU every time the car is turned off? Does the ECU learn a certain amount about what the engine needs when it's running?

[Vausey]

Why do you do that lol? And no it shouldn't effect it as it re-learns it all pretty much straight away. Just seems odd why you would cut it everytime you stop the car :s

[Mazz]

It shouldn't really matter as above, might just take a few seconds to adjust itself. I suppose mine is the same in a way, as i've got a battery kill switch/key which is removed when its locked in the garage, so no power to the ECU.

Why though?

[MK999]

You're not running a lambda, so nothing to learn. Might idle a touch funny for a bit but that's about it, that's all it can really monitor. I'm not even sure C20XE ecu's are that complex :p

[Iain]

OK cool, just a random thought that popped into my head as it was misfiring quite badly for a short period last night.

Same reason as Mazz, killswitch.

[MK999]

I think they might have taken "cut" a little too literally :p

[Mazz]

Mines also an early XE with lambda though, seems to make no difference whether its left with the key in or out, an hour or 2 weeks!

[Iain]

I think they might have taken "cut" a little too literally :p

Yeah bad wording on my part lol

[Spudly]

If it would cause it any bother, then a year or so during build with zero powere wouldve shown issues up before now lol

[Iain]

Yeah not so much being left without power, but how long it takes to learn what the engine needs again, if any learning occurs

[Adam]

The base map on an oe ecu is never going be bad enough for the engine to be misfiring.

[Benn]

I don't believe in the whole learning thing. Xe run the same if powered all the time or left with no battrey...