[s-cars] Re: stumbling, stalling, dead.

[Paul Gailus]

I think you should be OK with replacing the
fuses till you isolate the shorted coil.

However, if you'd rather not do it this way, you can check
the resistance of the coil primary windings to ground
using an ohmmeter (DVM or VOM) without replacing
the fuse.
Pull the connectors (on the metal flange at the firewall)
that supply 12 volts to the coil harness. Also, pull
the connectors from the POS outputs that are on the
other wire harness to the coils. Each coil primary winding
should then be isolated from eachother, and also floating
from ground.
Measure the resistance of each coil primary to engine ground.
You can do this at either end of the coil winding, but it
may be easiest at the POS connectors.
If you find a coil shorted to ground, you can successively
remove and insulate each coil from the aluminum coil cover
assembly till you find the bad one. You may be able to
speed up this process by noting if the short is on the
connector for cylinders 1,2,3 or the one for cylinders 4,5.
I remember Bill m mentioning that the wires are even
marked with tiny numbers corresponding to the cylinders,
but I haven't looked at them close enough to pick them out.

Paul

----- Original Message -----
From: <stefan13 at att.net>
To: <Airbil at aol.com>
Cc: <gailus at mindspring.com>; <s-car-list at audifans.com>
Sent: Saturday, February 07, 2004 8:30 PM
Subject: re: stumbling, stalling, dead.


> I very much appreciate the quick response.  My only concern is that the
ECU
> apparently takes power from the same fuse.  Should I take any precautions?
> Is there another way to test the coils, like resistance, or smell? :-)
>
> TIA
>
> Stefan