Pontiac Fiero 1988 Service Manual page 375

6C-4 FUEL SYSTEM
are installed as removed and that all linkage and cables
are not rubbing or binding in any manner.
ACCELERATOR CONTROL C A B L E
• Retainer must be installed with tangs secured
over head of stud.
• Conduit fitting at both ends of cable must have
locking tangs expanded and locked in attaching
holes.
© Flexible components (hoses, wires, conduits, etc.)
must not be routed within 50.0mm (2.0 in.) of
moving parts of accelerator linkage outboard of
support unless routing is positively controlled. •
ACCELERATOR PEDAL
When performing service on the accelerator
pedal, observe the following:
e The mounting surface between support and dash
panel must be free of insulation. The carpet and
jute in pedal and tunnel area must be positioned
to lay flat and be free of wrinkles and bunches.
• Slip accelerator control cable through slot in rod
and then install retainer in rod, being sure it is
seated. Care must be utilized in pressing the
retainer into hole in rod to assure the cable is not
kinked or damaged in any way.
• After securing all components of the accelerator
linkage, linkage must operate freely without bind
between fully closed throttle and wide open
throttle.
o Wire, hoses, cables or other obstructions must
not be placed within 13mm (33/64 in.) of cable
or rod at any point in their travel.
EVAPORATIVE EMISSION CONTROL S Y S T E M
(EECS)
An Evaporative Emission Control System (EEC)
is used to reduce emission of fuel vapors from the
vehicle fuel system. (See Section 6E Emission Control
System.) The system allows evaporating fuel vapors to
be stored for burning during combustion, rather than
being vented to atmosphere when the engine is not
operating. This is accomplished by venting the fuel
tank through a vapor canister containing activated
charcoal. The system utilizes a sealed fuel tank with a
dome that collects vapors and allows them to pass on
into a line connected to the vapor canister. The canister
absorbs these fuel vapors in a bed of activated charcoal
and retains them until the canister is purged or cleared
by air drawn through the filter at the bottom of the
canister. The absorbing occurs when the vehicle is
parked (engine off) and the purging or cleaning of the
charcoal bed occurs when the engine is operated.
The amount of vapor drawn into the engine at
any time is too small to have any effect on fuel economy
or engine operation.
With this closed system, it is extremely important
that only vapors be transferred to the engine. To avoid
the possibility of liquid fuel being drawn into the
system, the following features are included as part of
the total system: