How to replace an LS1 PCM Flash Chip?

[S10Wildside]

I've accidentally bricked two LS1 PCMs that are licensed to my EFILive V1 cable. The first was toast after playing with electronic throttle tables and the second was a result of a bad calibration file.

I sourced (what I think to be) the correct replacement flash chip, replaced the chip on the board, and I cannot communicate with the PCM using either EFILive or Tech2.

Does the chip need initialized somehow?

Or do the problems go beyond the flash chip?

[GMPX]

You can't fit a blank chip to the PCM, it needs to have 'something' put it in. You'll need an EPROM programmer to do this.

[doubledip]

As Ross said you need to have a calibration on the Flash Chip before fitting it.... otherwise tech2 and other tuning tools dont know how to handle it

you will need a eprom burner like a willem and also a calibration file to burn to it... can get a little tedious at times but is one of the best investments i have bought... that an a decent soldering station because if you lift the chips on a ls1 too many times you will really brick it

[poconojoe]

Email CalEditor@PCMCalibrators He clones PCM's if you blow your licensed PCM, he'll make you a duplicate

[GMPX]

"Clones PCM's", nice.
Anyway, if someone does require a replacement PCM at any stage, EFILive will replace the license as long as they can produce an invoice showing they purchased another PCM.

[schwoch1]

Anyway, if someone does require a replacement PCM at any stage, EFILive will replace the license as long as they can produce an invoice showing they purchased another PCM.

This I did not know........ Is this a new policy or did I miss something in the past?
Just one more reason I use EFI Live over that other H word!!!!!

Mike

[joecar]

This I did not know........ Is this a new policy or did I miss something in the past?
Just one more reason I use EFI Live over that other H word!!!!!

Mike

This has been EFILive's policy all the time... ("pay for a license only once").

[S10Wildside]

Thanks guys. It will be much better for me to stop wasting time on these bad PCMs and move forward with two new licenses. Our V2 has unlimited LS1-B stream, but the V1 cable has been very helpful for working with the two PCMs that are licensed to it. In other words, for those who know EFI Connection (like schwoch1), Bill tends to use the V1 cable in his workshop for his 24x SBC 33 Willys and other prototyping we work on there. Troy is going to be using the V1 cable soon in his workshop for his 24x SBC Honda Civic.

I'm still scratching my head about the flash that killed the second PCM. A customer had provided a TunerCat OBDII calibration file that was of interest for a base tune for an engine on the test stand. I flashed in the TunerCat OBDII file, read it out with EFILive, made a few changes, reflashed the PCM with EFILive, and the PCM was toast. If I recall correctly, the symptom was a chattering fuel pump relay with ignition ON. I killed another PCM (using the LS1-B stream and V2) thinking this was all a fluke. Same symptoms. I did not attempt a third PCM.

[poconojoe]

I'm pretty sure it can be recovered, but you have to lift the mem chip, If you get a Willem programer you should be able to do it yourself once you lift the chip. I know Jessie Bubb does them for other people. I've seen him offer the service from anywhere from NC to $15 plus the ride. When the fuwl pump chatters, its normally hung up in the boot routine

[GMPX]

I don't think Jesse offers that PCM repair service any more, he's busy with he's CTS-V ventures.
The chattering relay sounds like a symptom of mismatched calibrations for the PCM OS and it's in a rapid reset loop (I recall this happening a long time ago with LS1Edit on the 2001/02 year model changeover with the Holden's when they went from 12208088 to 12225074), but, there is no way EFILive would allow that flash to proceed if that was the case, I suspect something must be wrong with the file if it's taken out two PCM's.