ECU reset: what does it achieve?

petekav · Post by **petekav** » November 30th, 2005, 7:20 am

Got my MX-3 about two weeks ago, and have used some STP injector aned STP multi-valve cleaner over the past two tankfulls, which has improved performance!
I have seen a few posts suggesting that reseting the ECU will remove flat-spots and sharpen pick-up etc. Is this true?
What does the ECU "learn" that gets reset?

Thanks

PATDIESEL · Post by **PATDIESEL** » November 30th, 2005, 10:46 am

I don't think it will do anything. The ECU will look for fuel changes and adjust accordingly. So if you cleaned the injectors and intake then the ECU will know automatically. Resetting it wouldn't hurt anything if you want to try it, but I don't think it will actually do anything.

Spinkx79 · Post by **Spinkx79** » November 30th, 2005, 11:45 am

Its good for turning off that ugly orange light on the top left of your dash for about a half an hour

93_mx3_gs · Post by **93_mx3_gs** » November 30th, 2005, 8:06 pm

So does repairs.

I've never heard of resetting the ECU doing anything for any vehicle.

FlyVFR · Post by **FlyVFR** » November 30th, 2005, 8:22 pm

It will erase any stored faults for sure!

petekav · Post by **petekav** » December 1st, 2005, 6:35 am

Thanks guys.
The car is running well right now, so I'll just leave it alone!

I'm getting a major sevice done soon at a Mazda dealer - will they reset anything once they've changed the timing belt, plugs etc.?

MX3 GSR for dummies · December 1st, 2005, 9:54 am

petekav wrote:Thanks guys.
The car is running well right now, so I'll just leave it alone!

I'm getting a major sevice done soon at a Mazda dealer - will they reset anything once they've changed the timing belt, plugs etc.?

Try not to reset an ECU unless you have repaired a part to resolve a trouble code and the light doesn't go off. The ECU is there to learn from the sensors of your car and report. The repairs you are going to be servicing will not require a reset of the ECU.