Another Casualty

[Len Sabatine]

     7730/8625 may sustain an early case of the bends , residing under
     hood where it can get a toasting 300d . You can keep it there , I 
wouldn't.
     I've seen fans on some of the newer Sealed PCM's, much like what's on
     a PC's  CPU. Those die cast shells get very hot. Seems computers run a
     tad sharper when cool. Yep , Mopar sure took the direct approach to 
cooling,
     along with the silicone jell encapsulation.
     Len

>Probably why the mopar sbec/smec  is in the inlet stream ? Arghhh...
>so my under hood 16168625 is gonna die ??
>
>Lyndon.
>----- Original Message -----
>From: Len Sabatine <sabatine at epix.net>
>To: <gmecm at diy-efi.org>
>Sent: Thursday, July 19, 2001 5:00 PM
>Subject: Re: Another Casualty
>
>
> >     I'd like to add to Bruces comment about under hood mounting of plain
> >     Aluminum cased Ecm's. Better off NOT doing that gig. Starting with the
> >     7727's , They were environmental hardened and sealed to withstand
> >     the much harsher under hood noise and temp life. 7730's and the like
> >     enjoy happier lives in the passenger compartment.  Hee he , direct
> >    an AC duct hose at the Ecm , might keep it alive longer. [pun
>intended.]
> >    Len
> >
> > >Hahahaha.
> > >
> > >yes, they can go in an instant.
> > >You can overheat say a driver, say in WOT.  Then the next time you get
>the
> > >ecm that warm again it fails fully.  In playing with P+Hs in a saturated
> > >driver ecm, I did ruin several in different ways.  *Sometimes*, they (the
> > >injector drivers) can fail at higher rpm, after overheating them.
> > >Sometimes, instantly they go, go open.   A driven solenoid, can short,
>and
> > >then become heat sensitive, and in that way wipe out part of the ecm.
> > >
> > >Instead of reinstalling them, it's better to leave them just laying on
>the
> > >floor board so there is more airflow over them, and changing chips is
>just
> > >so much easier.   Mounting one under hood is just asking for trouble in
>my
> > >book (free advise)
> > >Bruce
> > >
> > >
> > >
> > >
> > >From: "Programmer" <nwester at eidnet.org>
> > >Subject: Re: Another Casualty
> > > > Really hot day there ?? This may sound funny--but pull your ECM and
>stick
> > >it
> > > > in the fridge for an hour...and re-install it. If it fires up
> > >fine...butter
> > > > it, it's toast. Did you sandwich cost $7.30 ??
> > > > Lyndon.
> > >
> > > > From: Gonyou, Jeremy (.) jgonyou at ford.com
> > > > Subject: Another Casualty
> > > > > So I go out to Wendy's to get a sandwich and when I get back my
>Sunbird
> > > > has a high idle, constant SES, and no ALDL comms.  I replaced my
>hacked up
> > > > memcal with a bone-stock unit, but the same stuff...limp home.
> > > > > Is it just me...or did my ECM go out to lunch the exact same time
>that I
> > > > did?
> > > > > Is this how the '7730s go, just all the sudden?
> > > > > Jeremy (limping home)
> > >
> >
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