CIS gauge

[quk@sievers.com (Phil Payne)]

Well, my "Star Hoffman Fuel Injection Tester" arrived from JC Whitney today, 
courtesy of some friends in Boston.  It looks a competent enough piece of kit, 
though I'll probably add some rubber protection to the head in imitation of the 
"real" (and ten times as expensive) Bosch model.
 
So, this weekend, it's going to be a fuel injection tear-down.

I found what was causing my "hot full load" stumble - the plug wire to #3 was 
not connected to the cap!
 
This has caused me to start thinking.  If I saw no problems on a cold engine, 
and also no problems on a hot engine at low or medium load, it suggests that my 
distributor is mis-aligned.  The misfire was appearing in situations where the 
ignition was advanced, but not when it was not advanced.  Ergo, the spark could 
leap distributor+fault+plug when not advanced, but could _not_ leap the same 
set when it _was_ advanced.  The plug gap and the fault gap were constants - so 
the distributor gap was increasing in the "hot full load" situation.

Does the logic appeal?  Is my next step to verify static timing?

--
 Phil Payne
 phil@sievers.com
 Committee Member, UK Audi [ur-]quattro Owners Club