Does anyone know how I can force my ECU to automatically switch to a higher gears @ lower revs, because although I'm quite gentle (always) on the car, it still insists on changing gears around 2500rpm automatically.

While in tiptronic I can change up a gear @ around 1600rpm in acceleration & this makes a noticeable difference in overall fuel consumption.

Yours is a learning ECU?

Disconnect the battery for 30 seconds, then drive the car gently. It'll learn fairly quickly to your driving style.

Yours is a learning ECU?

Disconnect the battery for 30 seconds, then drive the car gently. It'll learn fairly quickly to your driving style.

is mine a learning ECU? 97 TE verada?
does that mean if it is a learning ecu that if i dc the battery for 30secs and drive it hard as that it will rev out higher after i teach it my unique driving style? :badgrin:

All 3rd Gen Magnas are learning ecu's unlessu drive a manual or u use tiptronic only.

And if u put your foot to the floor after it just learnt to shift at 2000rpm it will still rev the crap out of itself trust me i know :badgrin:

I think if u do rev it out when it learns it will prob change a bit higher at around 2500-3000rpm but then unless u drive like that all the time it will prob stay between 2000-2500rpm to shift gears.

Tom

Many thanks to all for the kind & helpful advise. I'm led to believe that my condition is quite normal and the ecu's effecting the gear changes at point for best smoothness with adequate reserve of torque capacity for sudden acceleration if necessary without a kick down first in gear ratio.

I can force a earlier gear up-change at lower revs using tiptronic, but the torque is not there even if i floor the accelerator, for more acceleration. I guess i just have to get used to what I consider, the massive fuel consumption of the AWD (13L/100km, city) compared to the RWD falcons or commodores.

Deathkage, the operators manual states (at least in my TH) the best (ecconomy wise) range is between 1800-2200rpm... if you accelarate much lower than that (even though they will pull it quite easily) you will stress the motor more and generally use more fuel as unburnt fuel normally gets through... cruising is fine in the lower revs but when accelerating its better for the engine to be above that 1800rpm mark...

the other thing to note is that the engines think a little differently below about 1700rpm... when it is over this rpm the ecu only puts in fuel if your accelerating, or cruising... this is handy on a hill cause if you roll down in a higher gear (below 1700rpm) using the brakes you will use more fuel than if you changed down a gear (above 1700rpm) and let the gearbox do the work, the ECU will actually drop the fuel right off and let the momentum drive its self instead of going into an "idle" mode

Does anyone know how I can force my ECU to automatically switch to a higher gears @ lower revs, because although I'm quite gentle (always) on the car, it still insists on changing gears around 2500rpm automatically.

While in tiptronic I can change up a gear @ around 1600rpm in acceleration & this makes a noticeable difference in overall fuel consumption.

unless its an old V8 or diesel because they have all the torque just above idle, u shouldnt really upshift at those low revs. doing that will likely labor the motors bottom end, buildup carbon in the top end, and it end up being sluggish and poor state of tune thats not economical anyway.

Good points Altera98 & dingo, cheers.
PC

You can reprogram the ECU to shift gears at whatever engine speed you want. They do it at the dealer. And that learning thing is a pain in the ass, I disabled it.

You can reprogram the ECU to shift gears at whatever engine speed you want. They do it at the dealer. And that learning thing is a pain in the ass, I disabled it.
Now Thats interesting! :) what did you do? why did you do it? got more power? was it for better fuel economy? what configurations/settings did you have change? Which dealer? how did they do it? how much? :)

Is changing ECU setting something the end user can do?

I have a TJ 2000 auto sedan. I noticed the shifted to 4th gear at around 56kph. Since most local streets are now changed from 60kph to 50kph limit. Would I see any greater fuel efficiency if I get it reconfigured to change at say 46kph?

Dealers use their Mitsu computer MUT-II to talk to your car - Not a DIY job.

There is a small adjustment leeway for the changepoints but not much; its there
only to adjust the tranny to work at the factory-recommended changepoints.


Upchange at 1600rpm will probably labour the V6 more than its worth;
let the poor thing rev, you're not driving a 12L turbodiesel Mack.

Real cool watching the fuel cutoff on engine braking though... liftoff
going down a slope and the gas usage drops to 0.4L/100 on the computer.

I'm driving a 93 TR. I was just wondering is it a "learning" ECU as well?

nah only 3rd gens have learning ecu's
but thats a good thing becuase when robots learn
that humans are evil the car will kill you :badgrin:
and if you can make the ecu not learn then can you make it learn?
or do you need a differnt ecu??

I agree with most people here, changing really early is harsh on the labouring side to an engine and your best shift points are around 1800 - 2500.. but even under gentle acceleration 3000rpm wouldnt be bad either. The higher the revs (to a certain extent) the less the engine stresses. I've noted that no matter how gentle my TF is driven it will only upchange as follows:

1st - 2nd: Higher than 18km/h
2nd - 3rd: Higher than 30km/h
3rd - 4th: Higher than 50km/h

Downshift points the same but 2nd - 1st can change back anywhere between 10-20km/h.

not sure on the RPM's.. but its close to 2000rpm even with little/no acceleration.

I always drive in city in 3rd unless I can predict the tranny being able to sit in 4th for a longer period (slight downslopes and gentle cruising on flats), as repetitive changing between 3rd and 4th can possibly use more fuel and I heard it can cause more wear and tear on the gearbox.. anyone else heard/know this?

nah only 3rd gens have learning ecu's
but thats a good thing becuase when robots learn
that humans are evil the car will kill you :badgrin:
and if you can make the ecu not learn then can you make it learn?
or do you need a differnt ecu??

Does learning ECU means it can detect if you are using standard unlead or premium unlead and adjust timing accordingly?

Dealers use their Mitsu computer MUT-II to talk to your car - Not a DIY job.

There is a small adjustment leeway for the changepoints but not much; its there
only to adjust the tranny to work at the factory-recommended changepoints.


Upchange at 1600rpm will probably labour the V6 more than its worth;
let the poor thing rev, you're not driving a 12L turbodiesel Mack.

Real cool watching the fuel cutoff on engine braking though... liftoff
going down a slope and the gas usage drops to 0.4L/100 on the computer.

Has anyone gone to the dealers for their MUT-II to adjust their auto shift points? If so, which dealer has it and how much is the charge? Tried Eastside Mitsu but they don't seem to know.

Does learning ECU means it can detect if you are using standard unlead or premium unlead and adjust timing accordingly?
Nope. That would require a knock sensor and that'd be the job of the ECU, not the TCU anyhow. For some reason mitsu decided not to fit knock sensors to the 3rd gens, the 2nd gens had them though. Wierd that they removed them, as the 3L is the same in 2nd and 3rd gens

I wish the 2nd gens were learning, they never ever shift down a gear! I always end up manualy shifting the bugger down to second when I drop down to 30ish. So stupid :disgusted

Why do people keep saying that 3rd gen's have no knock sensor when the mitsu workshop manual clearly shows one???

Bump...

Anyone sent their car to Mitsi dealers to adjust the auto shift points or to shut the Invecs self-learning off? Care to share which dealer and how much?

Thanks in advance!

the dealer cant shut the invecs, or adjust your shiftpoints.. they can only reprogram the ecu with the files they are supplied with.. the rest of the information on these posts are myths!

Will the new downloaded files cause the auto to shift earlier at lower revs?

unless you know a programmer who understands and can make up a file to be uploaded into ur ECU, then no.. and also, only the vehicles with 2 plugs under the dash have reprogrammable ecu's.. the white plug next to the black obd connector! TH onwards i think!