Lost with TunerPro RT

[Gasnmyveins]

That was a good article. It was easily understood by a layman like me, and yet still provided a good overview of both the function and method of operation of all of the types of sensors. Thanks for posting it.

[steveo]

no problem i just googled one. you'll get the hang of it. it's the easiest gm engine to tune ever now.

read these too

http://ecmhack.com/tutorials/fuel-metering-modes/

http://ecmhack.com/tutorials/tuning-for-headers/

https://www.lt1pcmtuning.com/tips/

[Gasnmyveins]

Honestly sounds like it could be VATS.

Fuel pump and starter are both controlled by CCM. If VATS is the cause of the failure, your datalog will fail (CCM won't shut up and thus you'll get garbage data) and the SECURITY light will come on solid when you try to turn the key to the 'start' position.

Fuel pump has a backup, however, in that it can bypass the CCM-controlled relay if the engine has sufficient oil pressure. This prevents a CCM failure from killing the engine while the engine is already running. Of course, since the starter is controlled by the CCM it also means you can't build oil pressure that way until the VATS signal to the CCM is overridden with that resistor.

No spark means no coil firing. No injector pulse means no commanded injector. The latter could definitely be VATS. I don't recall spark being affected by VATS; I'm pretty sure all the documentation says the PCM only kills fuel, not spark.

I meant to respond to this earlier, but got sidetracked. 6 kids and 6 dogs will do that. The car cranks just fine after it stops, so I'm guessing it's something other than Passkey. I'm sure it IS passkey when it just refuses to start in the first place. It has all of the issues that point that way, so I'll definitely be doing the resistor soon.

[Gasnmyveins]

Steveo, I got into the difference tool. I don't know what the addresses mean, but I saw some differences between your bin and the one from my car. I started comparing differences in things like spark and fuel, and saw no differences. VATS and traction control are unchecked. VATS being unchecked leads me to believe the previous owner was starting to have occasional issues either with it not starting or with it stopping.
I'm guessing that the stopping or not starting issues, combined with the worn clutch and low tread on the race tires are what lead him to decide to sell it. I still got a great deal, though.
After reading how to tune for headers, I looked for O2 swing voltage and Integrator delay, but I can't find them. Are they from a different bin? If so, can you tell me what I should be looking for?
Is there a way to compare bins side by side, instead of switching back and forth?

[steveo]

the Corvette does not use the vats flag though it uses that other one

[Gasnmyveins]

the Corvette does not use the vats flag though it uses that other one

Right. I think he just tried to turn it off that way, and gave up when it didn't work.

[NomakeWan]

Right. I think he just tried to turn it off that way, and gave up when it didn't work.

You misunderstand what steveo was saying. Here is my stock 1995 Corvette code:

security.jpg

You can see that the "VATS Enable" is unchecked. This is because the Corvette instead has some features controlled by the CCM (namely that the CCM is what's actually reading your key, not the PCM). So that these features work properly, we instead use the two Corvette-specific VATS options, which are "Corvette VATS Enable" and "Corvette Security Fuel Enable."

EDIT: As for the O2 settings, those are under Air/Fuel Metering -> Closed Loop Configuration.

closedloop.jpg

[Gasnmyveins]

Thanks, NomakeWan. I went to look for the things you mentioned, but they don't appear for me. Mine looks totally different from what you have.

[Gasnmyveins]

Maybe that's because yours is OBD2 while mine is OBD1?

[Gasnmyveins]

It won't connect again. I'm trying to datalog, but it won't bring up the dashboard. The laptop and tunerpro RT are both on com 3. Either I'm doing something wrong, or I've got another issue.
The enable/disable data tracing button only has one arrow, facing to the left. I think it used to have 2, one facing each way.
At the bottom of the screen, it says Not Emulating, Hardware not found, Not ready, DA:Not Connected

[steveo]

okay one more time we are starting to repeat ourselves
dont datalog with tuner pro use eehack
you are using an old incomplete xdf, use the eex one from my site

[Gasnmyveins]

I'm sorry, Steveo. I have your EEX file on my computer. I was playing with the compare function, switching things around, to see how they look compared to each other. Apparently, I forgot to switch them back.
I've deleted the old one so I can't make the same mistake again. I don't mean to waste anyone's time. I'm just so new to this that I still miss the simplest of mistakes. Like trying to log with Tunerpro.

[steveo]

you CAN log with tunerpro but you need the corvette ADX, and connection is unreliable so you have to connect/disconnect a bunch of times till you 'win the lottery' and actually manage to connect.

with the ALDL bus on your car, there is a ton of blabbering going on and the software needs to pick the exact right moment to say 'shut up i am trying to do stuff'. it is complicated because your aldl bus is only one wire for transmit and recieve, so if we try to transmit while something else is already recieving, it just barfs. it's kinda like trying to get a word in when a crowd of people are talking loudly.

eehack and flashhack have connection timing methods for the corvette aldl bus that took like 100 hours of blood sweat and tears and being mad at nomakewan for owning a corvette in the first goddamn place. the method it uses would be almost impossible to implement in tunerpro plus tunerpro just isn't as good at logging the LT1 as eehack, not by a long shot.

yes you miss out on data tracing but that's a small sacrifice

[Gasnmyveins]

Every time I read your posts, I'm reminded that if I'm not careful, I just may learn something.

As far as the loss of data tracing goes, that's ok. I don't know what it is anyway.

[NomakeWan]

Maybe that's because yours is OBD2 while mine is OBD1?

Incorrect. OBD2 wasn't introduced until 1996. The 1994 and 1995 Corvette are identical as far as the computers go.

I see you got sorted out by steveo already though. Definitely going to reiterate however that you should never use TunerPro RT to datalog a 1994/1995 Corvette. EEHack only.

TunerPro RT is for datalogging much older vehicles, like my old 1990 Corvette.