Crazy VATS Problem

[KJL]

Originally Posted by lfalzarano

Just for the record, what was the ambient temperature when you did the restart? What was it, when it did not start if you can recall?


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Car started no problem. I stopped the car, opened the door and then using the door lock switch and noticed the security light go from blinking to solid. I used the key to open the door. I parked further away from the lines but once is not enough to rule anything out. It did the the partial start thing a couple of times today. I may be pulling the plenum soon perhaps I should pull the starter and have it looked at. The temp here has been around 50f.

[lfalzarano]

Don’t rush to conclusions. When it didn’t start was it a lot hotter. Just trying to determine the circumstances when it fails to start.


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[Ccmano]

Codes?
H

[KJL]

Originally Posted by Ccmano

Codes?
H

No codes

[Ccmano]

Originally Posted by KJL

No codes

To be clear, no engine codes and no CCM codes? They are retrieved two different ways. VATS is under the control of the CCM module.
H

[KJL]

Originally Posted by Ccmano

To be clear, no engine codes and no CCM codes? They are retrieved two different ways. VATS is under the control of the CCM module.
H

I typically use a jumper and pull the codes from dash. I also have a reader that can also pull codes. I have disconnected the battery since it happened so chances are if there any historical codes they are gone now. I will double check.

[Ccmano]

Originally Posted by KJL

I typically use a jumper and pull the codes from dash. I also have a reader that can also pull codes. I have disconnected the battery since it happened so chances are if there any historical codes they are gone now. I will double check.

That’s not going to get you the CCM codes. If you have a FSM there is a process where the buttons on the DIC are used to display the CCM codes to the LCD display in the instrument cluster. Page 8D-4 in the 1990 Manual. If you don’t have one here are the relevant pages.
H

[KJL]

That is how I do it. Ground G to A on the ALDL connector. Thanks for uploading the pages. I wish I had the books instead of the CD's.

[Chuck CoW]

Hey Guys,


Got in a 1993 ZR1 last week and wanted to disable the vats for the fella


while we were replacing the CCM and was going to change the skip shift and


fan settings for the fella. No big tune this time, just simple stuff.


After burning the Chip I was able to get it to start and run no problem, but


I had to install a resistor for the new bcm instead of the "simple" vats delete


I so frequently do in all C4s. I could not get it to work no matter what I tried


but additionally, the Tunerpro XDFs were kinda limited for this vehicle I noticed.


Not sure which calibration I have, but I was wondering if any of you know of


any problems with the Tunerpro XDFs or if (hopefully) someone can tell me


where to get a better XDF with some more comprehensive maps and parameters


for this and other ZR1s.


Hopefully it's just the XDF I'm using, unless someone on here knows of a common


VATS delete issue with these.


Thanks a lot!
Chuck CoW

[XfireZ51]

The 93-95 ZRs use the $F0 altho most likely the $F0A .xdf.