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PCM Placement

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Old Jun 10, 2018 | 06:22 PM
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Default PCM Placement

Hello all,

I am about to tear into my project and would like to get the wiring completed. I have read, watched and ordered the parts needed from lt1swap.com. Thank you Brendan for having this information readily available. My question is where will I be able to place the PCM?

Will I be able to use the method in the video to put it inside the car on the firewall?

Thank you for all the help,
Bill

1971 Ventura
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Old Jun 10, 2018 | 07:43 PM
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A lot will depend on your wire lengths. For me, I'm going to try and bolt it onto the inner fender sheet metal but below the outer fender metal. This will keep the PCM and its associated wiring protected and away from engine heat. For my OBD II connector, I'm hoping to fish it into the glove box and the Check Engine Light(CEL) LED will find a spot on the dashboard. I may try to let the Dakota Digital HDX dash that I intend to buy handle the check engine light if that is possible.

Its easy to add wire to the CEL, a little harder to add wire to the OBD II connector but I'd balk at adding wire to the PCM harness.

Rick
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Old Jun 11, 2018 | 08:37 AM
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I used a 2002 camaro harness and it was long enough to reach through my firewall. My pcm is mounted on top of my tunnel under my console.
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Old Jun 12, 2018 | 02:00 PM
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Depends which harness you have. If its OEM, you need to wrap it around the engine then let the harness dictate. This is a major downside to running a used harness
If you dont have one yet and wish to order a new one built to suit, mount the PCM where ever and measure to one corner of the intake. Tell the harness mfr the length and enjoy
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Old Jun 12, 2018 | 03:09 PM
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Here is where I mounted mine:

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Old Jun 12, 2018 | 04:16 PM
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I reworked an 03 express van harness and mounted the pcm on driver side inner fender
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