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Australian Falcons Discuss the australian born and bred models here. Includes the 80's 90's and present day Falcons offered by Ford Oz.

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Old 05-08-2007, 02:43   #1 (permalink)
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Need Help!

Could anyone help me in resetting my ECU on my EL falcon 5 litre?
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Old 06-26-2007, 06:16   #2 (permalink)
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Re: Need Help!

What do you mean by "resetting the ECU" ? Is there a problem with it ?
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Old 06-28-2007, 04:44   #3 (permalink)
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Re: Need Help!

i think its the same as ba i have the workshop book take off the +off the battery leave it off 1/2 hour put back start it and drive it for 1/2 hour then let it idie for 15 minutes it reset and recalagrate
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Old 06-28-2007, 22:25   #4 (permalink)
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Re: Need Help!

The time needed with the battery disconnected for an ECU to "reset" is often hard to find out. Some cars may only be a hour or two, whereas some I've tinkered with had to be depowered for 24 hours to default them! I don't really know how long the EL ECU will take to "die".

If you can default it, the best way to get it operating correctly again is to take the car for a long drive and put it through the FULL operating range of engine operation. That is, things like cold and hot starts, full throttle accelartaion, idling, heavy accleration with low revs and so on. In that way the ECU will settle to best manage the engine to give good performance and idling etc..

ECU's actually contain "tables" of engine operation information which the ECU can look up and use to make the engine operate to specs. When an ECU first starts up, it will generally use the "top table" that is intended for a new engine. As the engine wears, its parameters change which the ECU can correct by using the other tables. Theoretically, this ensures that the vehicle remains ADR compliant over its life. I said theoretically! With a repowered ECU, it may actually take several days for it to do this process and settle to get the engine running right.

Oh yes - calagrate??? Do you mean "calibrate"?
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Old 06-29-2007, 00:59   #5 (permalink)
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Re: Need Help!

The standard time to rest the Keep Alive Memory on Ford genuine PCMs is between 2 and 15 minutes, depending on year, model, if it's imported, etc. In all my years working for them I've never heard such thing as disconnecting the battery positive terminal, only the negative. You can also instantly reset the KAM by using a command from WDS or IDS. The re-learn time for these PCMs is usually a full driving cycle, 10-15 minutes, unless it's equipped with EOBD II ( 06 model european cars, probably next model Falcon) in which case the driving cycle is more complex and it could take a couple of days to complete.
I don't know which book the "recalagrate" guy was reading. BA/BF Falcons re-learn procedure is something like this: start up & idle for 1 minute, turn a/c on & idle for one minute, put car in drive & again one minute, go for a drive and put the car through the whole rpm range, including a couple of seconds of full throttle. The rest of the settings, only when the car is at normal operating temperature will it start correcting the values of the "tables" with actual ones, but you won't be able to notice this, as this is a constant and in many cases adaptive procedure, meaning that this values will change according to the way you drive the car.
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Old 07-18-2007, 09:22   #6 (permalink)
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Smile Re: Need Help!

Try this on ECC-V

disconnect for about one hour, put back on, start car with no a/c don't touch steering wheel, etc, as it fires drop it into drive (make sure handbrake is on firmly) this will reset the base idle. Let it idle like this for about five mins, then take the car for a good drive, making sure you drive it the way you will be normally using all the rpm range you will normally use & use W.O.T at least once. The car will be real doughy at first & improve the more you drive it.


Hope it helps with the EL.
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