I m getting a pcm is giving no responce? Did I cook it?

The strange part is that I noticed in the constant table that the cylinder volum was set at 17.xx (instead of 717 and the inj constant was like 2346 lb/hr? (instead of 24)and it was running fine? So I go through and through it.....made some timing changes etc....and I can t get it to run.....start and die....no start.....etc.....I d reload the base program and runs fine.....then just when I thought I had it cured.....I go to start it and as soon as I turn the key the fan comes on? The temp is not set that low? then I try another reflash and no responce from pcm?

Any suggestions?

 

What version of Tunercat are you using?

 

Shoot, if you saw that it wasn't reading the data correctly that is your first alarm to go back to whoever gave you the definition etc files and say "hey, I have a problem".

It sounds like its not reading the memory address' in proper order which would cause the values to be so screwy, or something is just plain amiss. There is a B version of the PCM but I dont know much about it. Can you still download the PCM?

When the fans come on like that, that means PROBLEMO, and sounds very much like a fried PCM. You can try to download the PCM again and flash your stock file back, you may wish to try pulling the PCM_BATT fuse first above your left knee.

 

click on ecm in the tuner cat menu and see which definition file you are using.when i got my tuner cat they sent me $ee and $eeb my stuff all looks good with ee but with eeb i get crazy numbers like you are.

 

Looks like this problem:

Dear C.A.T.S. Customer,

If you have recently updated to Version 1.98 of the Tuner program and are using the Tuner program in conjunction with the $EE ECM Definition File to program your PCM, please update to version 1.99 as soon as possible.

Version 1.98 has a bug in it that can result in your PCM not functioning properly. With version 1.98, if you make a change to the calibration and then immediately program your PCM without first saving the modified calibration file, an incorrect checksum will be programmed into the PCM. (The checksums are corrected for calibration changes when the calibration file is saved to disk.)This will prevent the PCM from operating properly.

The programming process will complete as normal without any error messages but the PCM will not function correctly after programming. You car will either not start or will start and immediately stall. The service light will flash and your fans will run.

To restore the PCM to normal operation, reprogram it with a valid calibration file (with the correct checksum). To create a valid calibration from version 1.98, either save any calibration changes to disk before programming your PCM or load a calibration file into the Tuner program and program the PCM with the loaded calibration file without making any changes to the loaded calibration.

You can download the update from version 1.98 to 1.99 from our web site at:

http://www.tunercat.com/software/tuner/update199.zip

To install the update, unzip the new wintuner.exe file that you downloaded and place the new file into your Tuner subdirectory, over-writing the old file.

This notice does not apply to the WinFlash program or the older DOS FLASH utilities.

We apologize for any inconvenience.


Best Regards,

TC



I got that in my inbox a while back and haven't done it yet but it sounds like your problem.

Good luck, Mike

 

Anything is possible, but the checksum re-calculation has nothing to do with reading a file incorrectly, I'm guessing either way though the PCM is toast, via incorrect values not allowing the PCM to know which way is up.

Good luck

 

Thanks for that link! I was running 1.98 and didn't get the update.