[T3] Chasing Engine Gremlins

[Bobsnotch at aol.com]

In a message dated 4/11/2011 5:41:30 P.M. Eastern Daylight Time,  
rdbills at aol.com writes:

Results:   The existing regulator tested at 13.5 volts at the  battery at 
moderate rpm.  I replaced it with a new unit and tested  again.  This time 
the result was 14.7 volts regulated voltage at the  battery.


I was able to road test my Squareback the next day on a  330-mile round 
trip to a VW event in Solvang CA.  Not only did the engine  run better, my fuel 
consumption went from 20mpg to 27.5 mpg.


Thanks  Jim!!!


My next quest is to determine why the idle is rough when  cold, and why the 
engine still "loads up" so that I sometimes have to rev it  up to "clear" 
the cylinders before it will accelerate like it  should.   An experienced 
(but prohibitively expensive) local  mechanic looked at my motor and 
immediately observed that the injectors  weren't matched (something my inexperience 
and lack of VW knowledge prevented  me from seeing).    If that is true, it 
would explain a rough  idle.  I suspect that one injector is bad and causing 
that cylinder to  load up with fuel at idle and low rpms.  Two injectors (1 & 
2) have  yellow caps at the tip.  No. 4 has a green cap.  No. 3 is the 
oldest  and appears to have a black cap.


Which are the correct  injectors? 
Your mileage is about right, now. FI normally gets around 27.5, sometimes  
better.
The correct injectors are either black or yellow. The green ones are for a  
larger engine (and would supposedly cause a cylinder to run rich). 
Originally  the 68's had black, and those were used for a few years. Then VW changed 
to  yellow for the bodies until the end of production. The green one is 
probably  part of your problem, but I don't know for sure. Personally, I'd just 
drive it,  and see how it runs for a while. It might clear itself up now 
that the system is  getting the correct voltage.

 
 
Bob 65 Notch  S with sunroof and IRS (Krusty)
71 Notch (Krunchy)
64 T-34 Ghia  (Wolfie)
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