VenkmanP

Just started playing with tunercat. I'm wondering why "vats select" and "crank air select" are unchecked on my car.

These would have both been enabled from the factory, yes?

I searched the forum and it's not clear if "vats select" disables the vats system, or maybe just a warning light about the vats system. Anybody know?

Is there any way to verify that vats is working other than having a key made without the resistor?

Why would someone disable crank_air? Air pump went bad?

STL94LT1

The VATS Select is probably just a warning light.

On the later 94 models a computer calibration update enabled the air pump during the engine cranking. With you using the $eeB calibration file for your car, your Vette is probably an earlier 94, before the updated calibration.

STL94LT1

You can check for any computer updates at this site.

calid.gm.com/vci/

VenkmanP

When I enable "vats select" the car won't run. I remembered seeing a receipt for a new lock cylinder and keys from 6 months ago, shortly before I bought it. I'm guessing vats got disabled around that time. I'm going to try reprogramming vats in case there's a key mismatch. If that doesn't work I'll take it to the dealer who changed the cylinder and ask what's up.

Enabling "crank air select" didn't cause any problems. Don't know if it did any good either...

I've looked at http://calid.gm.com/vci/html/getVCI.html a couple of times before and I don't know what to do with the information there. Is there some way to get hold of the latest calibration? Also I'm not sure how to tell which revision I have - is that 8-digit "Cal ID #" in the bin file somewhere?

Since it looked like your stock program was newer revision than mine, I changed the few settings that were different to match yours.

Would getting the latest calibration also update me to $EE instead of $EEb?

Thanks for all the help!

(Got another question but I'll start a new thread...)

STL94LT1

The bin file that I am using has all of the available updates, and the Vats is diabled on it.

Also, if you need a new stock file with all of the available updates with your VIN #. I have a friend that can get you one for a small fee. All you have to do is email him your VIN, and he will email you back a fresh file with your VIN on it.

STL94LT1

I could be wrong, but I think the only differences between $ee and $eeb, is that $ee has provisions for changing the calibrations on the electronically controlled automatic transmission that the early 94 didn't have.

VenkmanP

$EEb has the tranny settings. The tables that are in the $EE that aren't in the $EEb are "Max knock retard vs RPM", "Max knock retard vs MAP", "IAC offset for A/C Anticipate vs. A/C pressure"

There's also a single setting in the constants table called "Knock retard enable coolant temp."

Atok

My stock calibration has "VATS Select" turned off also. I'm 100% certain it came from the factory like this.

According to TunerCAT, the $EEb file is for older PCMs. Here's a cut from a recent Email I received from them:

--------------------------------
Please note that there are two versions of the $EE Definition File provided. The standard version (PCM_EE) is the one you will usually use. There is, however, an early version of the $EE calibration that GM used in early 1994 normally referred to as Rev B that is slightly different than the standard version. If you need to work with a Rev B calibration file, you'll need to use the second $EE Definition File (PCM_EEB).

tjwong

Don't select or rather I should say enable "VATS" if you do the car with start and die. The VATs system (vehicle anti-theft) is done through the CCM in our cars. The CCM is the master and the PCM is the slave computer.