I've got a question or two about the PP2. My car wont start and I'm wondering if I'm doing something wrong when I burn the chip. When the EPROM is finished being programmed, the message box at the top of the window is supposed to read "device has been programmed".....right? After I hit the "Program Device" button, it goes through and the window reads "Device being programmed from buffer". When if finishes, the window says "Device verified to buffer". What am I doing wrong? I open the program, select the AT29C256, load buffer from disk, move device from buffer, then program device.

:lala:

 

Generate a .bin of all FFs.
And burn that, just to make sure the chip is erased/clean.

try coping the .bin to the HDD and load buffer from the HDD instead of the disc.

AND be sure nothing is running in the back ground like Norton.
Try Alt/Contrl/Delet to quit everything but explorer, and try it. If something in the background reads something while programming you can have a chunk of the .bin messed up.

AND/OR program the chip, and then read it, save with a new name and then compare it to the original. If you see a bunch of items in a row that don't match something accessed the drive while you were burning.

 

"Verified device to buffer" means that everything that you loaded in the buffer (your Bin file) is now on the device (chip), which is what you want.

 

Ok thanx. I'll try that. But my process for burning the chips is right, correct? Load buffer, move device, verify device, then program device?

 

I load the buffer, then program device.

 

And if you're burning a 16k bin onto that chip, you'll need to stack it or set an offset.

By "moving device" in the second step that you list, you're putting whatever is ON the chip ALREADY, back in the buffer-- replacing whatever you just loaded--- and then burning it back to the chip. So it sounds like you may just be burning the same bad .bin file over and over. As mentioned above, just load the buffer and then program the device.

Jason

 

How do I make sure that my .bin is 32K? Or do I want to burn 16K and stack the file? What do you mean by stack the bin? Sorry for the dumb questions, but I'm just starting out. Thanx.

 

Ok. Sorry. I just read the 'help' topic in GMECM Edit about the bin stacker. I stacked the 16k .bin file to a 32k file since I'm using a 32k eeprom (at29c256). I'm going to program it and see what happens.

 

Just burned the stacked file (should now be a 32k file) and put it in the car and nothing. Turns over and sputters a little bit, but no start. What do you think the chances are of the ECM being shot? Or am I still doing something wrong? I checked the file size of the .bin that I stacked and it is now 32k. I'm loading that with the 6Ev010 ECU file for the 165 ECM. I'm going out of my mind!!!!!!!!!!!!

:lala: :lala: :lala:

 

Also, does it matter how I install the chips? I'm using the Craig Moates adapter and zif socket and install the EPROM with the little arrow facing the outside of the ECM ( with the arrow pointing to the left). I'm pretty sure on that, but does it make a difference whether or not I disconnect the battery or unplug the ECM? Just trying to cover my bases because I'm running out of ideas.

 

Yes it does matter, but it sounds like you've got it right: the notch on the chip goes to the outside. The Memcal is not backwards on the ECM, is it? I can't remember if it will go on there backwards. If you're looking at the memcal slot, with the side of the ECM where the harness plugs in facing towards you, the chip end of the memcal should be on the right. I always unhook the battery, but I know people who don't and it hasn't seemed to cause trouble yet. Just for the sake of being thorough, check the harness plugs that go to the ECM and make sure they're well-seated.

I failed to get the chip seated properly in the socket one time (I was trying to install it with the computer upside down, and I missed the socket with one row of pins) and the car would still start. It idled at about 1200 RPM and the fans and the SES light came on, but it DID start.

You can check to see if the program you burned on the chip is the same as what you intended to burn. Just don't close out the programmer software with the chip in the socket, or you might fry the chip. After you have programmed the device, change the chip type to 27C128 and click "move device". Then save the buffer with a different name, like "verify" or "test". Now open up GMECMedit and load THAT file as the .bin and use your original, "non-stacked" bin as the compare bin, and see if they are the same. If you try to read the chip as an AT29C256, the bins won't match because of the extra space on the chip, versus the original EPROM.

Jason

 

Ok. I've got the chip in there right then, and I've been using the right procedure for installing it and burning it. I'm now making sure the Bin's that I burn are 32k files.

Other than that, what could be wrong??

 

If you put the stock PROM back in will it run?

Why dont you get a buddy to swap out ECM's with you....its pretty much plug and play!

 

Stock PROM will not run.

I've got someone that will swap ECM's with me, but he just hasn't made it up here yet.

 

UPDATE: Tried my ECM in my buddies' T/A and it fired right up. I've got spark, and fuel pressure at the schraeder valve on the fuel rails and 12v. at all 8 injector harnesses with the key in the on position. I'm ready to give up.

 

Well if your stock PROM wont work then you know it's got to be something really stupid! Also, did you try his ECM in your car?

What are you using for scanning?

 

Yes, i also tried his ECM in my car. I hope it's something real stupid that way it ought to be easy to fix. Right now I don't have a scan tool.

 

So his ECM in your car didnt work? Another words you had the same problems, almost like your original ECM was in there, but it wasnt!?

Clear as mud

 

Correct. His ECM in my car acted exactly like my ECM in my car. Make sense?

 

Makes perfect sense

What about your MAF....have you checked that...maybe even change it out. I'm not sure if that would cause what is happening but its another thing to check!

 

I'm starting to think that it's a fuel problem. I sprayed some starting fluid into the throttle body and it tried to start. Maybe the ECM isn't grounding the injectors to fire them? How can I tell if this is the case? And which terminal on the ECM connectors is responsible for the ground that fires the injectors?

 

You'll have to either go by wire color and or get a manuel or something. I do not know off of the top of my head!

 

Figured I'd give it a shot and maybe get lucky but oh well.