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Old 30-06-2005   #1
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Self Learning ECU

They say that the Cinq ECU is self learning but what?
Under what conditions will it learn and what will it do.


Greetzz Dennis
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Last edited by TurboCinqy1250; 30-06-2005 at 22:40.
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Old 01-07-2005   #2
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Lightbulb Re: Self Learning ECU

when you change a part connected to the fueling/exhaust system, such as an induction kit, the ecu takes a few miles to calculate the air/fuel ratio at a given throttle position and then adjusts the ignition timing to maximise effieciency. whereas on a car with carbs you would have to run dyno tests, then rejet the carb and change the timing manually to stop preignition or over lean running, the ecu on an FI car works all that out for you.

It also means that your car runs like a bag of poo for a while before you get any real performance gains.
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Old 01-07-2005   #3
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Re: Self Learning ECU

Quote Originally Posted by TurboCinqy1250
They say that the Cinq ECU is self learning but what?
Under what conditions will it learn and what will it do.


Greetzz Dennis
The ECU needs to reteach itself after a power interruption (e.g. when the battery is disconnected), as well as engine mods.
This means that it optimises fuelling, sparking etc automatically over IIRC about 250 miles. So for the first 250 odd miles your engine may be rough running as the ECU is trying to optimise itself.
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Last edited by chaos; 01-07-2005 at 00:21.
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Old 01-07-2005   #4
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Re: Self Learning ECU

I'll add that the ECU will have programmed limits which it will not exceed because it will think the engine is being damaged.

You will need a re-programmed chip of piggyback ecu to get the benefit from more extreme tuning, hence the need for the MF2 in some turbo conversions.

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Old 01-07-2005   #5
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Re: Self Learning ECU

It'll only adapt so far, it's still running within the confines of a standard 1108cc map. You'll always get better results from a custom map designed for your setup.
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Old 01-07-2005   #6
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Re: Self Learning ECU

Quote Originally Posted by project-cinqy
when you change a part connected to the fueling/exhaust system, such as an induction kit, the ecu takes a few miles to calculate the air/fuel ratio at a given throttle position and then adjusts the ignition timing to maximise effieciency.
Is this in closedloop mode or openloop. With Lambda or Without.
I thought that full throttle always the values were from the chip inside.


So if I change some values with a piggyback like the SMT-6 the ECU still tries to correct it?
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