Reset ecu to gain performance?

[o_man_ra23]

cooter... it takes a few days to relearn your aggressive style too. By which time your motor is probably fried. Just something to consider before going and rooting your tune before an event.

[Squid]

I talked to the guys at Neal Bates/TRD about this a while ago. It does make the tiniest difference, but not worth doing mostly just a placebo effect.

If someone will sponsor a second dyno run for me on sunday I will test the theories...

[oldcorollas]

how does "aggressive driving" affect what the motor needs in terms of fuel and spark?
it would affect auto shifting times/rpm, but the engine needs certain fuel and spark to meet emissions goals and power goals..

and again, how does the ECU know when it is safe to adjust fuel or spark if it has little or no feedback?

[o_man_ra23]

how does "aggressive driving" affect what the motor needs in terms of fuel and spark?

It makes it "Fully Sik Uleh"

[Sciflyer]

I personally agree that this idea is a load of shit

It keeps coming up again and again on the Soarer forums... fact is you can drive your car as hard as you want all day, reset it 50 million times and when you chuck it on a dyno you'll still get sub 11:1 AFRs and ultra conservative timing

[Kyosho]

OC is correct here.

The ECU will correct CRUISE maps for fuel, and ignition timing WILL be retarded if knock is detected.

If the ECU were to be left to do what it wanted with timing retard and advance, then your car would not just have an oxygen sensor, but a whole 5 band gas analyser. As if the ECU just increases timing for great power, then emmisions in NxOx emmisions, goes through the roof.

There is a long term table, which is stored when the engine is switched off, and a short term, which resets under each time the engine is restarted.

If the engine has a long term issue, resetting the ECU can "remove" the retardation etc, until the ECU learns there is a problem again.

Basically, it's only really worth resetting IF your ECU has logged a fault.

When I reset my Commo ECU I got nearly double the power when I planted it off the mark... Purely for the fact the ECU had logged a fault, retarded ignition timing, and locked the auto gearbox in 2nd gear, and 3rd gear only.
Upon reset, I had 1st gear, and "normal" ign timing. (Car had a major gearbox fault... )

[DeftAnesthetik]

OC is correct here.

The ECU will correct CRUISE maps for fuel, and ignition timing WILL be retarded if knock is detected.

If the ECU were to be left to do what it wanted with timing retard and advance, then your car would not just have an oxygen sensor, but a whole 5 band gas analyser. As if the ECU just increases timing for great power, then emmisions in NxOx emmisions, goes through the roof.

There is a long term table, which is stored when the engine is switched off, and a short term, which resets under each time the engine is restarted.

If the engine has a long term issue, resetting the ECU can "remove" the retardation etc, until the ECU learns there is a problem again.

Basically, it's only really worth resetting IF your ECU has logged a fault.

When I reset my Commo ECU I got nearly double the power when I planted it off the mark... Purely for the fact the ECU had logged a fault, retarded ignition timing, and locked the auto gearbox in 2nd gear, and 3rd gear only.
Upon reset, I had 1st gear, and "normal" ign timing. (Car had a major gearbox fault... )

i'll second (or would it be third) this.

[dandan]

So if I was to take my 4age down to the race track for the day I would NOT be faster if I reset the ecu at the start of the day (after warming the car up) and doing a few hard laps?
Damn, no free power.

[amichie]

Worth reading it's only short.

Believing??

http://www.autoblog.com/2006/10/17/c...TOKEN=25439153

[o_man_ra23]

Can't believe this thread is still going (Post count +1)

[cooter]

yeah was just a thought. got aftermarket anyway so no frying. i hope lol