Date: Thu, 8 Feb 1996 13:59:08 -0700
Sender: Vanagon Mailing List <vanagon@vanagon.com>
From: john@nbs.gov (John W Clark)
Subject: 82 fi electrical question
hey all -
A few weeks ago I finished installing a long block. based on advice
from a shop I removed all the FI equipment as one unit so I had less
connections to undo and redo. The air distrib., injectors, fuel ring,
and cable harness were transfered as one unit. I remember
disconnecting the electrical connections to the aux. air valve and
thermo time switch (the thing that lives under the air distrib.)
The think runs WAY too rich and chokes out after 5 or 10 minutes. At
first I thought maybe I had excess fuel pressure. I tested it at
lunch today and it's ok.
So me thinks either damaged electronics (hope not), an injector or two
stuck open (from pencil debris {see earlier posts}) or
electrical/plumbing connections done incorrectly. I'd guess that the
injectors would get clogged not stuck open if there were debris in the
fuel line.
John Huguenard posted a note last month about reversing the electrical
connections between the auxilary air valve and cold start valve. His
symptoms sound similar to mine. I don't recall disconnecting the cold
start valve (but I might have, see paragraph 1) but I did disconnect
the thermo-time sensor(thermo-temp sensor?). So question 1 is how can
I differentiate between these connections (thermo time/cold start/aux.
air)? If I reverse them and run the motor (to see if they're cross
connected) do I risk damaging the brain ? I suppose it's safe to
disconnect the cold start connector and start the motor to see if it
runs better - though I can use a test lamp (see next paragraph) to
gather similar data.
, and the other pondering: I have a shop manual (neither hayes nor
bentley) that describes diagnostic procedures on this system using a
'test lamp' that looks like a screwdriver with a bulb in it and a
wire w/alligator clip. You connect it across the cold start valve
connector (for example) and see if the light lights, and how long it
lights, etc. anyone know if this will be a 12 v bulb ? If so I'll
use my static timer light and clip leads. Then I can sit in the front
turning the key, watching the lamps in the rear view mirror. Of
course I have to figure the answer to question 1 first ..........
cheers (is it friday yet)
john