Conversions & Swaps LSX Engines in Non-LSX Vehicles
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ECU location for Fox/LS swaps?

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Old Oct 19, 2012 | 09:04 AM
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Default ECU location for Fox/LS swaps?

Where is everyone locating their ECU's on Fox/LS swaps?...Are you having to extend your wiring? I'd like to mount it inside the car and keep the engine compartment clean...Let me know..Thanks
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Old Oct 19, 2012 | 09:53 AM
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in for pics. been thinking about this lately as im getting real close to running my harness.
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Old Oct 19, 2012 | 10:09 AM
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Originally Posted by LILHEMI
in for pics. been thinking about this lately as im getting real close to running my harness.
Me toooo...
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Old Oct 19, 2012 | 11:32 AM
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On my 90 LX with using a speartech'd 01 camaro harness I ended up with just barrrely enough room to mount it against the firewall just above where the passenger's feet will be. If you have the heater box out, it makes things a lot easier to keep it "up in the dash" and out of the way. If you want to take it any farther, you'll need to extend the harness.
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Old Oct 19, 2012 | 11:54 AM
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Mine is in the stock mustang location.
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Old Oct 19, 2012 | 01:54 PM
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For what it's worth, we provide 4-5 ft of harness length from the rear of the engine to where the PCM mounts.

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Old Oct 19, 2012 | 02:10 PM
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Mine is in the stock location as well.

Mounted it to a plate.

http://www.jegs.com/i/JEGS+Performan...40680/10002/-1
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Old Oct 22, 2012 | 07:23 AM
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Lotsa good ideas....Anyone else?
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Old Oct 25, 2012 | 07:46 PM
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PSI here
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Old Oct 26, 2012 | 12:11 PM
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PSI here to jon is a great guy to work with
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Old Oct 26, 2012 | 12:47 PM
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In my 85 I relocated the battery to the trunk, and put the ECU there.
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Old Oct 26, 2012 | 12:57 PM
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Originally Posted by groundczero
In my 85 I relocated the battery to the trunk, and put the ECU there.
Not a bad idea...I'll prolly move the battery too...


If anybody else has any ideas, don't hesitate....Thanks!!
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Old Oct 26, 2012 | 03:07 PM
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Depends on which harness you are using? F body or are you using a Truck setup? Truck harnesses are a gaudy in stock form and put the pcm in a junk location for a fox, however, you can pull the wiring from the pcm back around where it runs to the intake, and instead of extendeding 40 wires to the pcm, you can elongate the Alternator, tps, iac, cts, injectors, cam sensor to fit, which is only 28 wires to extend about 4 ft to put it in the passenger kick panel. Not too hard to do once you unloom the whole harness and have it sitting in the car.

If I had a stock harness to work from, I'd save the money, convert it, lengthen it, shorten, etc., because building a sub fuse box only cost about 50 bucks in materials tops, but if you had to buy a harness, I wouldn't waste the time, Id spend the money on a PSI harness as its already longer than factory and nearly plug and play
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Old Oct 28, 2012 | 07:42 PM
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right above the glove box door. I removed the far passenger vent tube to make room
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Old Oct 29, 2012 | 07:49 AM
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Originally Posted by superbean
Depends on which harness you are using? F body or are you using a Truck setup? Truck harnesses are a gaudy in stock form and put the pcm in a junk location for a fox, however, you can pull the wiring from the pcm back around where it runs to the intake, and instead of extendeding 40 wires to the pcm, you can elongate the Alternator, tps, iac, cts, injectors, cam sensor to fit, which is only 28 wires to extend about 4 ft to put it in the passenger kick panel. Not too hard to do once you unloom the whole harness and have it sitting in the car.

If I had a stock harness to work from, I'd save the money, convert it, lengthen it, shorten, etc., because building a sub fuse box only cost about 50 bucks in materials tops, but if you had to buy a harness, I wouldn't waste the time, Id spend the money on a PSI harness as its already longer than factory and nearly plug and play
I already have a stock F-body harness...Thnx a lot for the input tho...Every little bit of info is a huuuuge help...I'm planning on using the T/A gauge cluster too....I have a COMPLETE harness to use from headlights to taillights!...I'd like to to look factory but very clean...Thanks again!
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Old Oct 29, 2012 | 07:50 AM
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Originally Posted by Bowtiedford
right above the glove box door. I removed the far passenger vent tube to make room
AHHHHH...Good idea!!...Thnx
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