Ferrari Mailing List: Re: Diagnostic Problem - 1995 348 Spyder

[Dave Handa (dave]

This appears to be the part in question?
http://www.ricambiamerica.com/product_info.php?cPath=13_733&products_id=2611
04



============================

You almost certainly have a bad engine ECU.  They come in pairs.  Lots and
lots of failures of these components in the 348 (and in the 355 as well, but
less common).  Failure mode includes major loss of power, resulting from the
car running on four cylinders.  If this happens, do not drive the car.  

Side-of-the-road cure:  kill the battery to reset the ECUs, restart, and
problem may have gone away.

Diagnosis:  swap ECUs from side to side.  If the error now shows on the 1/4
bank, you know that you've got a bad ECU.

Failure mode:  housing around ECU cracks from strain and heat, then moisture
seeps in, causing occasional errors.

Fix:  replace ECU.  If you're cheap and handy, you can try sealing the
cracks with a silicone sealant, but that might only buy you time.  The part
is not cheap (last time I checked, about 6 years ago, it was close to $300,
surely more, maybe much more now), but labor is DIY, at least.

Vty,

--Dennis


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