If you are
experiencing a
sticky throttle pedal when the throttle has been closed i.e. you try to
gently
ease on the gas, nothing happens & then it un-sticks and gives the drivetrain a lovely jolt then you may be one of
a couple of
problems:
1) Possibly you may have a problem where the cable comes through the
bulkhead.
If you disconnect the cable at the throttle and check that the pedal is
free on
its full travel, you might find that the cable is sticking when you put
a load
on it it may feel OK if you don't have a
load on
it. It is possible for the cables cut groves in the ends
and only
sticks when they have been put under quite a heavy load (full throttle
against
the stop.
Or
2) Most likely if you have fitted the Accufab
throttle body; during a deceleration, the throttle plates flex and get
pulled
slightly further closed than normal as the high vacuum caused by a
quick
deceleration can pull the throttle plate further back into the throttle
causing
the sticking, that is why its OK when the motor is not running. So when
you
next accelerate, the throttle sticks.
The fix is easy; open the throttle plate set screw 1/8 of turn to give
more
plate clearance to the bore. It may require a 1/4 turn or more but be
careful
only to open as much as necessary or you might lose idle speed control
due to
excessive airflow through the throttle body so note how much you adjust
the
screw you can go back if you over do it.
Picture below shows Accufab throttle body
with idle screw arrowed.
Dreadnought had the same problem with the ZT520 race car at Cadwell
to-day one whole turn of the idle stop cured it and stopped the car
going
sideways all over the track!