I recently replaced the fuel distributor on my 87 Golf GL. Replacement
actually had exact same numbers, which I thought was going to be
impossible for a while but a list member had one! After installation the
car ran OK except a little cold natured. Over a period of two weeks the
idle speed started creeping up tho the throttle stop was still locked
down. I figured this was due to the fact that the car had not run for
several months and glazed fuel deposits were dissolving, etc. I backed
off the fuel stop to get the idle below 1K but now the car is extremely
cold natured. It is extremely hard to start and runs rougher than 2 cobs
until warm and then it is fine. I am trying to get a handle on the
function of some of the CIS components however I have a Chilton’s manual
but which is sorely lacking in detail. Hope someone can answer a few
questions until I am employed enough to purchase a Bentley manual.
There is an electric fuel solenoid on the driver side of the distributor
that controls fuel flow from one side of the base to the other. It hums
sometimes as though being rapidly cycled. What is it’s purpose?
The CO plug is missing. Is this allowing unfiltered air into the intake?
The cold start injector on the manifold downstream of the throttle
butterfly is electrically controlled. Is the control signal a variable
voltage or just full on/off? Is it controlled simply by a sensor or a
more sophisticated circuit?
Lastly, there is an adjustment screw on the front side of the manifold
near where the throttle linkage connects. It is large and inviting to us
unknowledgeable folks as it even has large countersinks in the casting
around it to guide our misguided screwdrivers. Though it has repeatedly
tempted me I don’t want to fiddle with it if I don’t know it’s function.
Answers to any of the preceding questions would be appreciated.
Best Regards and Happy Independence Day to All,
John Hite
Denison, Texas, UNITED STATES OF AMERICA ( yes I am shouting on purpose
:^) )