When to reset ECU?

[haffeel]

Hi all,

I have just installed a new AFM to my ride E30 325i, I have Motronics 1.3 ECU.

Is it necessary I should remove the battery terminal and do a general ECU reset after installing a new AFM?

On the other hand, under what conditions do we need to reset the ECU for better performance of the car?

The last time I did reset was when I installed a zone chip, then when I installed a new Inlet Manifold and BBTB. Then again when I changed the Blue Temperature Sensor.

My mecahnic says it is rediculars !

Whats the verdict ?

cheers/haffeel

[Ant]

Pull the batt terminals for 30 mins and refit Haffeel M8, there are no stored diagnostic codes on your Motronic version , but it cant hurt

[haffeel]

hi Ant,

Doing a reset cant hurt, Well Said.

thanks a lot for the reply

[Brianmoooore]

AFAIK, there's nothing on an E30 ECU that needs to be reset. It'll learn any new settings that are required by adapting the existing ones

[haffeel]

Brian, does it means, the ECU will self learn as it goes along for the new settings by itself ? In other words technically no need any resetting.

But I can vouch, after I installed the BLUE sensor I took the car for a drive and it was behaving funny as ever, what I mean no change. Only after I did a ECU reset by removing the supply terminal from the battery and refit , the car behaved correctly.

TQ

[Brianmoooore]

Brian, does it means, the ECU will self learn as it goes along for the new settings by itself ? In other words technically no need any resetting.
TQ

AFAIK, yes. I've never "reset" an E30 ECU after working on a car, or seen anything in writing anywhere suggesting that you should.
Disconnecting the battery just loses the stored settings, rather than "resets" anything.
I.E. When you reset a modern computer you enter default values into its memory for each value of stored data. In the case of the E30 ECU it's just simple amnesia.

[Ant]

maybe its a regional varaition ?

Haffeel is in Malaysia (sp?)

[jonbuoy]

Brian, does it means, the ECU will self learn as it goes along for the new settings by itself ? In other words technically no need any resetting.
TQ

Disconnecting the battery just loses the stored settings, rather than "resets" anything.

I would never go against your knowledge of the E30 engine but i have a query........
If the battery is diconnected and loses the original stored settings and when connected stores the new info then this tells me it has reset to take new info?

I understand "Reset" means back to original setting's but by disconnecting the battery would sort of give it a fresh memory to store new info?

Please correct me if this does'nt make sence