Printable View
Does anyone have the 64K bootable image that can be flashed to the 28F512 PLCC on a 1995 LT1 PCM? I've got everything set up and ready to burn, just doen't have an image! I read in another forum that either the first or last 64K of the 128K PCM image can be loaded into the PLCC to get it talking again, so if someone can confirm this I would be set to go. --Brian
do you happen to know which side you're playing with? for sake of not having to do it again, it would probably be best to do the correct half.
here are both halves of BNDH, which according to the label attached to it, came from a 95 corvette.
Appreciate the info and the files...I believe I'm working on the T-side (gray/blue).
here is what I have
based on that, blue and gray is the T-side. good to know.
Just wanted to let you guys know that after many hours of trying to repair a 16188051 that flash-crashed I got it up and running. The desoldering, soldering in a socket and flashing the chip was the easy part. I tried many (many) bin combinations and the one that finally worked was the combination above by 96lt4c4.
First flash attempt and PCM is back on line and easily flashed with my final bin.
Thanks all
Hey EdZip,
This is fantastic! I am lucky to have found this thread. Not two hours ago, I bricked my '95 LT1 PCM while flashing with WinFlash. I have never had a problem flashing with anything else. Today I decided to try WinFlash and it killed it.
I cannot communicate with it anymore. The LEDs on my ALDL adapter won't even flash anymore. They used to go wild as soon as I plug in the laptop.
I was going to send it out to the TunerCat people. They say the can fix it for $25 but, I see here you were able to bring it back from the dead. Would you mind it too much to paraphrase what you did? I am not foreign to electronics, so if you want to get down to techs, I am fine with that.
I am not trying to get out of the $25, I really want to learn how to do this since I have the feeling this is going to happen again. I want to get the EEPROM on a ZIF if that is possible and buy a dozen of of those little suckers just to be on the safe. :)
Could you please share the knowledge?
Thanks.
Quote:
Originally Posted by Winchy
Follow this thread:
http://www.gearhead-efi.com/Fuel-Inj...-repair-source
BUT bookmark this thread...it has the (2) bin files that worked. As a matter of fact the repaired PCM is still in the car working great. If you run into any problems...just send me an email.
Ed
I'm all over this like soy sauce on a dumpling. Thanks man!
Killed my 16188051 this weekend mid flash. I cannot find the ED80009-ND socket nor the AN28F512 chip online besides in bulk. I tried searching many different keywords without any luck. I've replace a few bios chips in the past that were pre programmed and many integrated video chips with my cheap flow bench. I'm wondering do I really want to spend all this time "trying" to get this going. I am willing to do so but if there is someone reliable that can install the socket and program a few chips I may take that route. I've got another ECM already but a socketed ECM would be great for future bricked units. Thank you
Found some Flash AN28F512 chips. Will any eprom socket work? Sorry for the back to back post. I have some free time at the office.
Finally got the programmer in yesterday. It 3 tries but the 3rd times the charm right. The first time I used the Flash BlueGray file above. After I programmed the chip and installed all seemed well. The fans didn't come on like when it's bricked. I used TunerCats and it got maybe 30% and had a wrong message sent error. Next go round I used the BNDH FirstHalf file. After installing the fans came on immediately so it was a no go right off the bat. Third try I used another chip and went back to the Flash BlueGray file and I also used EEHack. I did the stability test first and passed all 15 and I knew we had something. Flashed my latest bin file. The ole LT1 came to life! Thank you all for the help.
make sure your chips are the correct height in the socket. i had a hell of a time. if they are too low the pins make poor contact
Seconded:Quote:
Originally Posted by steveo
I've read that a couple of times and without a small piece of credit card (old) underneath they were flaky.
I also had to do the same with the programmer.
I also found a light polish on the pins & the socket helped. Used the edge of a sharp knife just lightly to clean up the faces.
Mitch
The PLCC sockets have a plastic "floor" in them that you have to cut out to hand-solder them, if you're hot-air soldering then it may not have to be removed? Anyway-you MUST put that floor back in after you've soldering them in place, or they will absolutely not work.
Sometimes even with the floor in place they don't work...