[T3] missing on cylinders #2 & #3 FI 72 Fastback
Dave Hall
dave at hallvw.clara.co.uk
Tue Jan 10 14:29:55 PST 2012
Is the fouling black sooty or black oily?
I'd check the resistance of the leads first - with the plug cap original
Bosch leads should be around 1 KOhm (1000 Ohms) and reasonably similar for
all 4. Look in the dark for sparking between leads and the engine. Has the
weather changed to damp meanwhile?
You could try a timing light on the leads to see if there's a problem
elsewhere. There might be a crack or track between 2 and 3 in the
distributor cap. A new cap (or even an old one if you have one) might prove
where the problem is.
Dave.
UK VW Type 3&4 Club
===================
-----Original Message-----
From: type3-vwtype3.org-bounces at lists.vwtype3.org
[mailto:type3-vwtype3.org-bounces at lists.vwtype3.org] On Behalf Of Vern
Creamer
Sent: 10 January 2012 22:05
To: type3 at vwtype3.org
Subject: [T3] missing on cylinders #2 & #3 FI 72 Fastback
Newbie lurker joining the fray. I have already learned a lot from this
group.
Had the engine out last week for clutch repair; installed new spark plugs
while the engine was out. Ran terrifically for the first 100 miles or so,
smoother than ever. Over the last 50 miles, it's been missing as I rev up
each gear; sometimes, it gets somewhat smoother once I get over 50 or so.
So far, I've replaced the (brand new) spark plugs ... #1 & #4 looked
perfect; #2 & #3 are fouled black ... all of this after just 150 miles.
When running, all 4 plug wires spark when loose but held close to the
distributor. When I back #1 & #4 away, the engine begins to stall; when I
back #2 & #3 away, there is no change to the engine.
The next thing I'll check are the plug wires; after that, not sure which
direction to go. Suggestions?
Vern Creamer
Omaha, NE
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