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WHere to get a spare PCM?

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Old Jul 13, 2002 | 01:50 PM
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Default WHere to get a spare PCM?

Where's the best place to get a spare PCM and about how much do they cost?
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Old Jul 13, 2002 | 05:16 PM
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Default Re: WHere to get a spare PCM?

If you have a 99-02 check with Valvegod@aol.com or search for him on the boards. He has them for something like 100 or 150 but I can't remember. He usually has everything except 98's.
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Old Jul 14, 2002 | 03:34 PM
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Default Re: WHere to get a spare PCM?

Just curious as to why 98' pcm are so hard to get?
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Old Jul 14, 2002 | 05:16 PM
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Default Re: WHere to get a spare PCM?

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by slick98ta:
<strong>Just curious as to why 98' pcm are so hard to get?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I'm guessing cause it was the first year of the LS1 in F-Bodys, so they probably have different wireing schemas than other years.
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Old Jul 14, 2002 | 07:25 PM
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Default Re: WHere to get a spare PCM?

www.speartech.com
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Old Jul 14, 2002 | 07:42 PM
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Default Re: WHere to get a spare PCM?

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by slick98ta:
<strong>Just curious as to why 98' pcm are so hard to get?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">They were only in the 98 model year cars. They are phyically bigger (and slower) than the new 99-02 PCM's.
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Old Jul 14, 2002 | 07:43 PM
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Default Re: WHere to get a spare PCM?

Yes.. that's $150 shipped from valvegod@aol.com for a 99-02 PCM. HIGHLY Recommended!
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Old Jul 15, 2002 | 03:52 PM
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Default Re: WHere to get a spare PCM?

Okay, I understand why the 98's are harder to get (and yes the pin assignments are different that the later years), but where does one go about getting a spare 98 PCM? They must be available somewhere, Painless wiring mandates a 98 Camaro PCM for thier harnesses.
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Old Jul 15, 2002 | 04:03 PM
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Default Re: WHere to get a spare PCM?

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Chris Spiess:
<strong>Okay, I understand why the 98's are harder to get (and yes the pin assignments are different that the later years), but where does one go about getting a spare 98 PCM? They must be available somewhere, Painless wiring mandates a 98 Camaro PCM for thier harnesses.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Try John Spears at Speartech. www.speartech.com
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Old Jul 15, 2002 | 11:20 PM
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Default Re: WHere to get a spare PCM?

Another vote for ValveGod here. Had a spare PCM to me in like 2 days. REAL nice guy to deal with too. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
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Old Jul 16, 2002 | 12:14 AM
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Default Re: WHere to get a spare PCM?

cool... sounds like valve god is the wayt o go.... hopefully my stock PCM will be fixed in a week or so (haven't sent it out yet) , then i'll have the cash for the spare <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
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Old Jul 16, 2002 | 06:42 AM
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Default Re: WHere to get a spare PCM?

I got my '98 PCM for $150 shipped from http://www.junkyardjimmy.com - I found him through a used parts locator service. It came out of a '99 454 truck, but I was able to get it reflashed with my VIN & 6-speed file.

I've seen one or two in the classifieds here, but they probably go pretty fast.

-Andrew
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Old Jul 16, 2002 | 10:15 AM
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Default Re: WHere to get a spare PCM?

You should look into getting your PCM socketed. Then you dont need a spare, just spare chips. I think Andrew is the guys name that does it for LT1's. Maybe its possible on the LS1's also???
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Old Jul 16, 2002 | 11:19 AM
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Default Re: WHere to get a spare PCM?

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by pugsLT1:
<strong>You should look into getting your PCM socketed. Then you dont need a spare, just spare chips. I think Andrew is the guys name that does it for LT1's. Maybe its possible on the LS1's also???</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">That's what I've thought about. The Flash chip is just an intel flash chip. I tried to find some on the net to no avail... a socket would rock though... changing chips like the 3rd genners do <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
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Old Jul 16, 2002 | 11:51 AM
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Default Re: WHere to get a spare PCM?

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by pugsLT1:
<strong>You should look into getting your PCM socketed. Then you dont need a spare, just spare chips. I think Andrew is the guys name that does it for LT1's. Maybe its possible on the LS1's also???</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Yeah, Andrew is the guy's name. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

That would be me.

I personally would not do it on an LS1 PCM.

The packaging profile of the flash chip (Intel 28F400BX, I believe) does not lend itself to being socketed and 'driven hard' for long, in my opinion. You can get ZIF sockets for these chips at http://www.emulation.com - I think something like this might work but I could be wrong - heck, it probably won't even fit in the PCM shell.

The LT1 PCM uses PLCC (plastic leaded chip carrier) surface mount chip, which can be socketed in a nice, secure socket. The LS1 uses a flat surface mount DIP (I think it's a TSOP) that doesn't socket as easily.

That's why I bought a spare PCM. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

You can probably get the chip from a end of life distributor at http://www.partminer.com - I haven't looked, though. It has been discontinued by Intel.

-Andrew

<small>[ July 16, 2002, 11:52 AM: Message edited by: Camaroholic ]</small>
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Old Jul 16, 2002 | 11:59 AM
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Default Re: WHere to get a spare PCM?

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Camaroholic:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by pugsLT1:
<strong>You should look into getting your PCM socketed. Then you dont need a spare, just spare chips. I think Andrew is the guys name that does it for LT1's. Maybe its possible on the LS1's also???</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Yeah, Andrew is the guy's name. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

That would be me.

I personally would not do it on an LS1 PCM.

The packaging profile of the flash chip (Intel 28F400BX, I believe) does not lend itself to being socketed and 'driven hard' for long, in my opinion. You can get ZIF sockets for these chips at http://www.emulation.com - I think something like this might work but I could be wrong - heck, it probably won't even fit in the PCM shell.

The LT1 PCM uses PLCC (plastic leaded chip carrier) surface mount chip, which can be socketed in a nice, secure socket. The LS1 uses a flat surface mount DIP (I think it's a TSOP) that doesn't socket as easily.

That's why I bought a spare PCM. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

You can probably get the chip from a end of life distributor at http://www.partminer.com - I haven't looked, though. It has been discontinued by Intel.

-Andrew</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Good info <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> I found a few docs too on my companys intranet... seems we've got a few hundred thousand of these chips..... can't confirm if they're the BX version though (just says 28F400 and some say B4, B2, B5 .... I wonder if BX means that any of the B series would work?)

If only I had a contact in the automotive division of Motorola, hehe
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Old Jul 16, 2002 | 04:15 PM
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Default Re: WHere to get a spare PCM?

I think its a surface mount PSOP chip.

The legs extend away from the chip. They are also very small and fragile.

I've removed and reinstalled plenty of 28F400 chips without breaking 1 leg though. A heat gun works VERY well for both removal and reinstallation.

Hi Andrew! <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

- Keith
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Old Jul 16, 2002 | 04:17 PM
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Default Re: WHere to get a spare PCM?

Here is the socket I was looking at:
http://www.romtools.com/psop44.html

I haven't tried it yet though. Would make my T&T a lot easier.
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Old Jul 16, 2002 | 06:01 PM
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Default Re: WHere to get a spare PCM?

Very interesting reading.

My question is "Why couldn't you take a '99 and up PCM and a wiring diagram and convert the '98 wiring harness to a '99. You would only need to know the pin out, would you not? The engine controls are the same between '98 and '99 are they not?"

Just askin'.
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Old Jul 16, 2002 | 07:21 PM
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Default Re: WHere to get a spare PCM?

does anyone know if its possible to put a 99-2002 pcm in a 98? I know I would need to change the wiring harness but will it work? anyone done it?My reason for wanting to do this is because the 98`s are hard to tune @ wot with ls1 edit they just run very rich with H/C package the 99-2002 dont seem to have this problem!
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