Try:

http://www.loam.org/vw/

At this site there are great resources for diagnosing every bit if the
Digifant fuel injection.  I got more out of the Digifant manuals at this
site than the Bentley manual.

Laurence Smith
90 Westy "Fanumbos"

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM]On Behalf
Of Gary McEachern
Sent: Monday, October 15, 2001 9:46 PM
To: vanagon@GERRY.VANAGON.COM
Subject: compression/vacuum/fuel pressure/O2 voltage

My son's new '87 syncro is still running pretty rough.

I monitored fuel pressure 30 w/vacuum, 39 without vacuum. GOOD

I measured compression: 160,140,160,155  SO SO?
Plugs look pretty sooty!

I measured vacuum: 15" at 950 rpm, some fluctuation (GOOD/BAD??)
                   20" at 2,000 rpm, smooth

I monitored O2 sensor voltage (with lead disconnected):
0.05V at idle with 30 PSI fuel pressure   BAD?
sensor voltage rises above idle
0.8V with 39 psi fuel pressure at idle (vacuum disconnected)???
(exchanged AFM... No difference!)

I thought I might next check the injectors for spray pattern..

Anything else I should do?

Any comments or suggestions will be greatly apreciated.

Gary

Gary McEachern, Reading Ma.

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