I am mounting the coil packs and ECM on my swap in the location of the original battery. How are you guys mounting these? Thanks. Anyone make any brackets??

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87 GT Fastback soon to be 3800 S/C Powered!!

I mounted the coil packs in the OEM battery location. I made my own mounting bracket and tilted it toward the engine to make routing the plug wires easier. Also, since it's under the vent rain will roll off rather then settle on it, even though it is water proof.

The PCM I placed in the stock location. Just seemed simpler though the simplest would be the trunk.

Hows this look for your PCM ?
https://www.fiero.nl/forum/A...090219-2-086464.html

Not too good. Since my PCM is a 1997 and a different shape.

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87 GT Fastback soon to be 3800 S/C Powered!!

Awww, bummer !

for my ecu tray i just used the 4cly mount and added elastic straps, the only problem with it is that it is too tall for the glove box.

You can put the coils on the firewall on the left side of the trunk hinge.

I found a piece of angle aluminum that was approx 4"x3" and cut it to length, mounted the coil pack to this, and then mounted it to the existing battery tray...



-ryan

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OVERKILL IS UNDERRATED

Custom GM OBD1 & OBD2 Tuning | Engine Conversions & more | www.gmtuners.com

I mounted mine coil packs to the firewall on the passenger side. The PCM is mounted in the trunk. I found the trunk location convenient as I also mounted an auxiliary fuse box in there that feeds a lot of externals such as fuel pump, oil cooler fan, PCM and ac clutch fan. I also mounted an OBD2 plug in the box so I can read the PCM out right there at the engine compartment. The old battery tray area is probably a good idea except that for my application that is where my trans cooler is located.

quote Originally posted by Fiero Master: I am mounting the ... ECM on my swap in the location of the original battery. How are you guys mounting these?...

Will the ECM live unsheltered from the elements?

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RickN
White 88GT 5spd (<10K miles)
White 85GT (SC3800 Series II w/ AOD)
White 99 F250SD 7.3PSD 6spd
1956 Ford 860 Tractor w/ Freeman Loader
20Ft H&H Tilt Bed Trailer

quote Originally posted by RickN: Will the ECM live unsheltered from the elements?

Yes, as long as water cannot get into the connectors. But special care will need to be taken as most Fiero swaps involve removing a lot of the wiring circuits not needed for the swap. Removing wires from the OBD2 PCM connectors will leave small holes exposed, which moisture/water can get into. This needs to be prevented. You should also shield your PCM so water cannot collect and freeze in any spot on it or the connector as the ice can break these parts.

There is a plastic mounting tray available that will hold these PCMs neatly; most 2001-06 GM fullsize trucks used them and they will work with the 98-03 style 3800 PCM.

-ryan

My PCM is from a 97 Bonneville and is the older style and a different shape.

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87 GT Fastback soon to be 3800 S/C Powered!!

bump

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87 GT Fastback soon to be 3800 S/C Powered!!

im leaving my coils in their stock location on my GTP motor and mounting the ECM ina custom box safe from rain where the battery used to be.

PCM is pretty much weather proof - no reason to make a box when you can just make a bracket to mount it.

quote Originally posted by americasfuture2k: im leaving my coils in their stock location on my GTP motor and mounting the ECM ina custom box safe from rain where the battery used to be.

I thought the 3800SC coils HAD to be relocated to fit in Fiero?

quote Originally posted by Tengis: PCM is pretty much weather proof - no reason to make a box when you can just make a bracket to mount it.

If you remove any wires from the PCM connectors there will be some small holes left where those wires were and water/moisture could get in.

quote Originally posted by sportcoupe: I thought the 3800SC coils HAD to be relocated to fit in Fiero?

Some engine mounts do drop the engine low enough to keep the coilpack in the stock location, most dont though.

Steve

and i just found out the hard way that mine do not. but i forgot about my coil conversion im doing

I did some minor rework of a 3800 swap for a friend and one of the items was to relocate the coils. The harness was mostly factory and there was enough length to mount the coils off the passenger frame rail w/o modifying the harness. Just needed to make the "T" shaped mounting bracket and weld it to the frame: