Tuning Suggestions(1996 Buick Roadmaster - 1995 Chevy Impala SS ECM)

[LeMarky Dissod]

'96 & '97 OBD2 LT1 pcms are STILL the bastard stepchildren of the tuning world.
There are very few OBD2 LT1 mail-order or ride-along tuners left.
For slightly more than the cost of an OBD2 LT1 mail-order tune, an OBD1 conversion has been the best bang for the buck for a while.

Now that steveo's $EEhack & FlashHack are on the scene, the bang for the buck hits even harder for even less buck.
Just make sure your wiring is all sorted.

[steveo]

the 1994 and 1995 stuff will always be better
why?
cause eehack
thats why

"i cant read certain things datalogging"
what does that mean?

[Capt1501]

In the EEHACK program I can't look at the *Trans or *Diag data. It just says no data in all the tables. I can only look at the Dash and *Main data. I'm sure there is a setting or something I'm missing.

[NomakeWan]

Correct. You have to actually enable those streams by clicking one of the buttons on the right side of those tab screens. "Snapshot" is useful for getting the *Diag data since it's really just instant codes you'll want. Streaming *Trans will get you your active transmission data.

These streams are disabled by default in order to allow Main*/Dash to work faster, since you have limited bandwidth to work with.

[steveo]

this ecm has various datastream messages. by default only the main engine data is logged. each additional message decreases the logging rate of the other messages being logged at the same time. press stream to enable a message. you also have a speed slider. that way you can make one message 'higher resolution' and one 'lower'. eehack is unique in that it has that sample rate control but also deals with alternating datastream messages in its log. your graphing and analysis tools are designed to deal with different sample rates and synchronizing them properly.

[Capt1501]

Thanks for suggestions, sorry, it's been days since I have even had time to open this. I will hook it up tomorrow and try that out.

So, why do you think me transmission isn't down shifting coming to a stop? A few updates since I posted this.

1: If I touch the gas at all under 10mph (That's my light throttle shift point) it down shifts. Even in neutral or park. All I have to do is is make the TPS move.
2: Sometimes it stays in 3rd sometimes 2nd
3: Does it in open or closed loop
4: Can force it to shift to first when in control mode whenever I want it to.
5: I've changed my Base programming or Original programing numerous times in the Transmission parameters and a few others. Small changes mainly. Still the same thing.
6: Made my Biggest changes in last BIN file. Running on it last few days. Calmed down the transmission a lot. But still no down shift coming to a stop.
7: Realized this all started when I first changed Trans parameters trying to calm second low throttle shift harshness down some from my initial Programing. But screwed up and recorded over my first BINs so can't go back and compare them.

I'm missing something.
Will try to download my newest BIN file.
Hopefully downloaded 2 BINs. Tranny one was changes made to Tranny of course, what I consider pretty big changes. The AFR-TIMING one is the same as Tranny one but with other changes..

Can down load Data log if anyone wishes to see it.

Again Thanks for talking with me.
This is fulfilling a old mans dreams I've had for a long time. Wish I was more computer literate. Learning though!

[kur4o]

There is a table called 2-1,3-2,4-3 shift tables, I guess you screwed that up. And the trans never gets the threshold to execute downshifting.

If it doesn`t shifting to 1st on stop, I think the engine should stall. On eehcack there is a current gear dialog, What that shows, when coming to a stop.