Best source for an ECM for the '91 200 TQ 20v?

[Phil Rose]

Jim,
Another "vulnerable" part of the system is the distributor-shaft gear 
(original gear is nylon) and also its "mate"--a steel gear that is 
(usually) an integral part of the exhaust camshaft.

About a year ago, my '91 200q lost power while on the track at 
Watkins Glen. Later on at the shop, an inspection revealed that the 
flywheel pin had broken off. A replacement pin was installed, but the 
car still would not start.

Further investigation revealed that the distributor drive gear was 
not mating with the camshaft gear. But when the distributor was 
pulled, they didn't see what they expected: in fact the notoriously 
fragile nylon gear at the end of the distributor shaft was in perfect 
condition, but the steel camshaft gear that meshes with it had 
snapped off.  I've since heard that it's happened to others but not 
common. Much, much more common is disintegration of that plastic gear 
that's pinned to the end of the distributor shaft.

So...getting the car to start required replacing the exhaust cam, and 
for good measure, the long-overdue replacement of the nylon 
distributor gear with the (Benz) metal upgrade.

Perhaps you've eliminated  the possibility of such distributor 
issues, but be sure to do so before going to the expense of replacing 
the ECU. Good luck.

Phil




At 2:17 PM -0500 12/2/10, <James.Pasqualoni at sungard.com> wrote:
>Maybe a dumb question-but have you verified that the timing pin on the
>flywheel is present and in good condition?
>
>-----Original Message-----
>From: <200q20v-bounces at audifans.com>@SUNGARD On Behalf Of "Jim Hollander
>at Hot Grips Mfg., Inc." <Jim at hotgrips.com>
>Sent: Thursday, December 02, 2010 2:13 PM
>To: 200q20v at audifans.com
>Subject: Best source for an ECM for the '91 200 TQ 20v?
>
>On my "Unable to start" 1991 200 TQ 20v after getting the Vag-Com, and
>following the Vag-Com codes that my car had a bad engine timing sensor
>and


-- 

Phil Rose.....Rochester, NY USA
'06 A3q 3.2 V6 (20K, silver)
'91 200q	(165K, Lago blue)
Gone to Audi Valhalla:
'91 200q   (Tornado red)
'89 100 (Bamboo gold)