98 vs 99+ pcm
Thread Starter
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Joined: Aug 2006
Posts: 286
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From: St.Peters Mo
98 vs 99+ pcm What are the main differences, problems, ect. i have a 98 pcm and harness for my swap but keep hearing that its not fast enough and has tuning problems. Im not trying to start a battle over tuning just want to know what the main differnece is and if i should try to get a 99+.
if you can, get a 99+
0411 is the pcm
the 97-98s (ls1a) pcms have hindrances with their OS...not as many 'rows/columns' vs the 99+ pcms.
a good tuner should be able to work around it...without an issue.
the 0411 pcms also have the capability to use custom OS's via efilive .
0411 is the pcm
the 97-98s (ls1a) pcms have hindrances with their OS...not as many 'rows/columns' vs the 99+ pcms.
a good tuner should be able to work around it...without an issue.
the 0411 pcms also have the capability to use custom OS's via efilive .
Staging Lane
Joined: Sep 2011
Posts: 66
Likes: 0
From: Waterford, MI
Same concern - is 98 OK? Good timing (for me) on this question. I picked up an ECM from a 98 Corvette (service number 16238212) for my conversion awhile ago, and just read today some comments about tuning issues with the 98s. I was searching the forum for more detailed information, but was struggling to find it. My plan is to build a fairly stock motor - 5.3L block and heads, Ls1 (or LS6) intake/TB and LS6 cam. So based on the comments in this thread, I should be OK with the ECM I have, right? Meaning, a decent tuner should be able to work with it for my application, right? I really don't want to shell out hundreds of $$ on another ECM if I don't need to -- especially since I have the wire harness that matches the 98 ECM. Thanks!!
Tuned several 1998 F-Body's & C5's without issue. No way would I hack up someones car by swapping a newer PCM.
If a tuner can't tune a 1998 pcm, then they won't be able to tune a 1999+ PCM either.
The 1998's only have a 2 bar OS available, so if you have more than 14.5 lbs boost it could be a problem.
Russ Kemp
If a tuner can't tune a 1998 pcm, then they won't be able to tune a 1999+ PCM either.
The 1998's only have a 2 bar OS available, so if you have more than 14.5 lbs boost it could be a problem.
Russ Kemp
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