[Gmecm] Putting the computer in the engine compartment?

[Jay Vessels]

Hi there!

The problem isn't heat -- it's water.  Water will want to travel along 
every seam, opening, and will migrate along the wiring harness.  Sealing 
the ECM from water is the chore.

David's box is a good example of what to do -- notice the wiring is 
through weatherproof connectors. That is the key -- it's easy to get the 
ECM in a waterproof box, but sealing the wiring's another issue. 
Installing weatherproof connectors in the box, and running wiring from 
the connectors to the ECM is the right answer.

Jay Vessels
1982 Chevrolet S-10 Sport, 2.8V6 TBI
1984 Chevrolet S-10 Blazer Sport, 2.8V6 (TBI pending)

David Allen wrote:
>   Check out this box I used for boat installation.  E-mail me offlist and I
> can provide more info including AGCO/ Caterpillar part numbers for
> connectors and wire terminals.
>   This setup is 100% hermetically sealed as long as box lid is on and both
> harnesses are plugged in.
> David
> 
> http://home.hiwaay.net/~davida1/ecmbox.jpg picture of box
> 
> http://home.hiwaay.net/~davida1/boat.htm other pictures including box
> 
> --------------------
> 
> ----- Original Message ----- 
> From: Charles McDowell
> To: gmecm at diy-efi.org
> Sent: Wednesday, November 23, 2005 7:22 PM
> Subject: [Gmecm] Putting the computer in the engine compartment?
> 
> 
> I have a 7747 ECU.  What keeps me from putting it under the hood if I make
> sure to keep it dry in an enclosure?  It seems to me that if the thing can
> operate in desert climates after being shut in the car all day in the sun,
> it could survive on my fender under the hood - at least heat wise.  What am
> I missing?  I'm having a hard time finding a spot in my truck to put the
> computer where it's accessible for changing chips and such without being in
> the way.  For now I have it between the seats in place of the center
> console, which is super convenient for changing chips and messing around,
> but I don't want it there forever.  The harness interferes with some of the
> ducting and makes the glove box hard to close because I routed it through an
> existing hole in the firewall (this is a conversion to an 83 K5 blazer).
> 
> 
> 
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