TDMKR496

iTrader: (3)

Doing a 5.3 swap in a 88 mustang, where is a good spot to mount the PCM?

nuckifuts

iTrader: (7)

I went through the factory hole and mounted it on top of the AC box. I MIGHT have had to remove the 'fresh air' portion and made it recirculation only. Its been a long time so i am not 100%

soundengineer

iTrader: (16)

stock PCM's were made to be in the engine bay as they are sealed from dust and moisture...so just mount it on the firewall somewhere on the passengers side..


if you get rid of all the HVAC stuff like I did, theres plenty of room behind the dash..LOL.

TDMKR496

iTrader: (3)

I read this morning where a guy mounted it in the stock ford ECM location, I'll see if thats possible.

Swapper

iTrader: (10)

i seen where a guy mounted it under the passenger seat.

soundengineer

iTrader: (16)

like I said... all kinds of room if you remove all the HVAC stuff....

a few pictures...but sorry... no stock ECU on my setup

TDMKR496

iTrader: (3)

Thats very nice. I'm keeping the HVAC.

Docked Wage

One of my customers cut a square hole in the cowl and mounted it so the connectors are under the hood and the main body of the PCM is under the leaf screen.

BigEd_72455

iTrader: (7)

Biggest concern is what harness do you have?

Is it a stock harness for car or truck? Is it an aftermarket harness that has been lengthened to your specs?

Or do you have a harness and need a location to do measuring for a harness order?

BigEd_72455

iTrader: (7)

I don't really see that happening because the ford ecu is smaller and plugs for it are in the narrow end facing up. The GM plugs are in the long side facing out.

If you opened up the area quite a bit, you could do it, but before stuffing it in there for good, I would make ABSOLUTELY CERTAIN that everything is working PERFECTLY..

BigEd_72455

iTrader: (7)

Say man, you need about 20-30 more connectors/lights over there, I can still see some PANEL!!!!!

That location gonna have a USB connector for plugging in a flash drive to play music? LOL

TDMKR496

iTrader: (3)

Well I don't believe that its going to mount in the original ECM location, I am going to see if there is room between the ac box and the transmission tunnel once I get the dash back in.

streetlegalls1

iTrader: (15)

Here is another option

TDMKR496

iTrader: (3)

This is what I am going to do. I looked at the air box and it just screws on. All that box does is diverts the intake from outside fresh air or cabin air.

geoff17

That's exactly where I put mine too.

geoff17

groundczero

iTrader: (2)

Since I was relocating the battery to trunk, I put my ECU where the battery use to be.

streetlegalls1

iTrader: (15)

You'll loose the blower motor too

streetlegalls1

iTrader: (15)

This seemed to be the ideal option for me using the PSI harness so i didn't have to move things around on the inside,you can hide the harness or not.

TDMKR496

iTrader: (3)

I like the placement of it, but I'm using a PSI harness and it doesn't have enough wire for that to reach.