98ws6blk

When you send in a your pcm for a mail-order-tune, is the tuner able to pull any data from the pcm about how the car is running?

For example, can they see what your air/fuel ratio has been and what your timing is, etc?

I'm not sure if any of this info is "saved" to your pcm or if the tuner is just applying a general tune without any data about how the car is runing?

Kevin01Z28

iTrader: (8)

They will have the ability to see your entire tune. So yes they could see your spark tables and your commanded AFR. At WOT your pcm ignores the o2's so it has no way of knowing if the engine is going rich or lean. The tuner wont be able to see if you have been getting knock for whatever reason and they will probably just take your pcm and flash it with their own "mail order tune." Or maybe they will just alter your original tune im not sure. Seems a little redundant to save everyone's original tune.

Frost

iTrader: (45)

I keep ALL copies of the way the PCMs come in. AFR is measured in your pipe with a wideband, so no, that can't be seen. Codes are erased when power is removed, so they are gone too.

As for the last sentence, I guess that depends on your tuner.

98ws6blk

Ok. I don't care about saving my factory tune...guess my wording was weird.

I just wanted to know what info the tuner could access about how my car is running.

Frost

iTrader: (45)

If you want a tuner to see how your car is running, you have to take him your running car

98ws6blk

Got it! That's what I thought ; )

06MonteSS

no...

yes, they can see how your current tune is set up and what things are set to... but they won't know how well the car is actually running with those settings, unless you provide them with recorded data logs so that they can see data from several different parameters...

98ws6blk

Got it! Thanks!

Any idea when the In-Tune is coming out?