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PCM swapping between 98 & 99-00 T/A's

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Old Jul 23, 2003 | 01:26 PM
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Default PCM swapping between 98 & 99-00 T/A's
do you guys know if PCM's are interchangable between the 98 and 99 & newer models? The cars in question are a 98 T/A A4 and a 00 T/A A4. If the PCM's were swapped between these two cars, would they work?

thnks
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Old Jul 23, 2003 | 02:15 PM
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Default Re: PCM swapping between 98 & 99-00 T/A's
The pin outs are different so you cant just direct swap.

JR
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Old Jul 23, 2003 | 02:57 PM
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Default Re: PCM swapping between 98 & 99-00 T/A's
hmm..that sucks

you say it's not a "direct" swap. Can it be done somehow? Or is it not worth the trouble?
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Old Jul 23, 2003 | 05:44 PM
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Default Re: PCM swapping between 98 & 99-00 T/A's
The 98's have a unique PCM. 99 & up are all the same with different programming.

Only way for a direct swap would be the entire wiring harness at the same time
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Old Feb 1, 2006 | 05:28 PM
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how hard is it to swap the wiring harness?
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Old Feb 1, 2006 | 06:15 PM
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It required changing the cluster, and fuel tank to use all OEM parts.

A big pain...

Ryan
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Old Feb 1, 2006 | 06:34 PM
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so can i just leave the 98 pcm and harness alone and then install a 99+ engine ?
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Old Feb 1, 2006 | 10:04 PM
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Yes, the 99 engine has all the same sensors in the same locations. So you can use your 98 engine harness with it. Except the 99 has a 2 wire coolant temp sensor, and the 98 has a 3 wire. So keep the 3 wire sensor from the old heads.
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Old Feb 1, 2006 | 10:18 PM
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thanks
anything else different when swaping between years?

josh
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Old Feb 2, 2006 | 12:30 PM
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just buy a new harness you can get one for about 550.00 At superior harness company
501 982 1050 with new plug and new wire and heat shrink boot
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Old Feb 2, 2006 | 12:32 PM
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Just get a BS3
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