Changing out a PCM in a '98

IrishMac · 2008-09-14 03:56:37

Anyone ever done it? What are the benefits, etc? :bigears

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Sep 13, 2008 | 11:56 PM

IrishMac

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From: Always living in a state of Confusion.

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St. Jude '03-'04-'05-'06-'07-'08-'09

Changing out a PCM in a '98

Anyone ever done it? What are the benefits, etc?

Sep 14, 2008 | 12:35 AM

dgrant3830

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From: Van Buren Arkansas

Wounded Warrior Escort '11

I can't imagine why you would want to change out the PCM but you need a Tech 2 Scan Tool to do the job. RPO Codes, Security and who knows what all else. Don't forget the software/firmware updates from the GM TIS site too.

Sep 14, 2008 | 12:41 AM

timemender

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From: Stark County Ohio

For upgrading to a newer faster PCM with the ability to do more advanced tuning - Look here.

http://forums.corvetteforum.com/show....php?t=1750377

Sep 14, 2008 | 12:43 AM

dgrant3830

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From: Van Buren Arkansas

Wounded Warrior Escort '11

That makes sense. Wiring changes would be needed but can be done. I quickly thought of that post I too had seen before.. lots of wires to get right, connector changes and etc... but you are correct with the possible programming options.

Sep 14, 2008 | 01:35 AM

IrishMac

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From: Always living in a state of Confusion.

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Quote:

Originally Posted by timemender

For upgrading to a newer faster PCM with the ability to do more advanced tuning - Look here.

http://forums.corvetteforum.com/show....php?t=1750377

Yikes! I'm not so sure I have the patience/knowledge to do that.

Thanks for the link though.

Sep 14, 2008 | 10:43 AM

416 Rigby

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From: Oro Valley AZ

ECS tuned PCM

I have mail order tune on a 98 PCM by ECS, this runs a Novi SC, long tubes, C6 manafold, ported polished TB, big injectors---on and on. Running app 7# boost A/F rario runs in the green most of the time on the wide band, and all the HP/TQ I am comfortable with a stock bottom end.

The ECS Doctors saw no need to change the 98 PCM.

Sep 14, 2008 | 12:10 PM

phils C5 vette

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St. Jude Donor '12-'13-'14

check with Ed at:

http://www.thehpfactory.com

he just did WKMCD

Sep 14, 2008 | 07:39 PM

WKMCD

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From: Haymarket VA

Quote:

Originally Posted by dgrant3830

There's certainly no shortage of misinformation on the internet today. First, you don't need a Tech 2. There are no issues with security codes, RPO codes and "who knows what else". This forum would be a much more useful place if people didn't know what the hell they were talking about didn't post.

Ed Hutchings at AUtomotice Techonlogies in Portsmouth, VA did mine recently. I don't think he wants to do another one soon.

The advantages are a faster processor and finer tuning capabilities. It was worth it to me to get 513 RWHP running pretty damn close to stock. Once changed you will need to tune using EFILive. HPTuners doesn't like the VIN not matching the PCM year.