OBD2 tool

[DRW]

"Then there are the tuners who burn new ROMs for OEM units."

Why are my ears burning?

I could go on for hours about the ways the ecu de-tunes the power delivery in certain areas to make it feel smoother and more controllable for the masses, but I might start to sound like a ranting conspiracy theorist!

So let's just say that the auto manufacturers might be more concerned with consumer satisfaction than maximizing FE or power at all rpm/throttle openings.

[SVOboy]

Tuning a DSM costs too much. Go honda!

[Silveredwings]

Originally Posted by DRW

"Then there are the tuners who burn new ROMs for OEM units."

Why are my ears burning?

I could go on for hours about the ways the ecu de-tunes the power delivery in certain areas to make it feel smoother and more controllable for the masses, but I might start to sound like a ranting conspiracy theorist!

So let's just say that the auto manufacturers might be more concerned with consumer satisfaction than maximizing FE or power at all rpm/throttle openings.

I wish I knew more about the things that can be done by reprogramming.

[SVOboy]

You're a bimmer man, you can rechip your car very very easily, time for you to learn.

[Silveredwings]

Originally Posted by SVOboy

Tuning a DSM costs too much. Go honda!

I don't know that TLA so can you elaborate?

[SVOboy]

TLA!? Iono what it means, but mehbe you're asking about DSM? It's a term for eclipses and such, diamond star motors I believe.

[Silveredwings]

Originally Posted by SVOboy

TLA!? Iono what it means, but mehbe you're asking about DSM? It's a term for eclipses and such, diamond star motors I believe.

TLA=Three-Letter-Acronym

[MetroMPG]

Originally Posted by DRW

I could go on for hours about the ways the ecu de-tunes the power delivery in certain areas to make it feel smoother and more controllable for the masses, but I might start to sound like a ranting conspiracy theorist!

We already know you're nuts, so fire away!

In your opinion, between 1000 and 3000 RPM where I usually live, think there's room for improvement in my 993cc engine's ECU? (That RPM range probably rules out the engineers' concerns about making it "controllable" )

Note I don't want to increase NOX emissions.

[Silveredwings]

Originally Posted by SVOboy

You're a bimmer man, you can rechip your car very very easily, time for you to learn.

I didn't see this before and you're prob right. Where would I start to get edumacated? TIA.

[CoyoteX]

If you wire up a knock sensor to your stereo and play with your timing you can see there is a lot of economy to be had under 3000 rpm on a Metro. The factory tuning is not really tuned for economy at all it seems like. I can actually drive 45mph/5th gear with the timing 20 degrees advanced without knock steady state. My vacuum readings with that much advance are a lot higher than normal so I know it is getting much better mileage. It knocks under load real bad like that though so it isn't drivable other than to experiment.

Sadly the only people that know the timing and fuel maps for a metro ecu want to sell chips and are not interested in letting anyone know the map locations in memory so there is no way for me to tune the stock computer without a lot of effort to decipher the maps. The factory computer is pretty limited anyway so for a metro to get better tuning you need a megasquirt computer and a wideband O2, EGT, and knock sensor. Then you can run lean burn 18:1 ratio all you want