Pontiac Fiero 1988 Service Manual page 542

DRIVEABILITY AND EMISSIONS - FUEL INJECTION (TBI) 6E2C2-11
SACV ATTACHING SCREW ASSEMBLY
EXTERNAL SACV
O-RBNG
GRIME SHIELD
8P 0917-AS
1/15/87
1 I T H R O T T L E B O D Y
A S S E M B L Y
IT]
T U B E M O D U L E A S S E M B L Y G A S K E T
3~| T U B E M O D U L E A S S E M B L Y
T U B E M O D U L E S C R E W A S S E M B L Y
1/15/87
Figure C2-15 - Flange-Mount IAC Valve Figure C2-16 - Tube M o d u l e Assembly
Remove or Disconnect
1. Electrical connector from IAC valve.
2. Screw assemblies and IAC valve.
3. IAC valve o-ring and discard.
Clean
© IAC valve seating surfaces on throttle body to
assure proper seal of new o-ring and contact of IAC
valve flange.
NOTICE:
If the IAC valve has been removed during
service, its operation may be tested
electrically with the IAC/ISC Motor Tester
(Available Tool # J-37027, or BT-8256K).
However, if the valve pintle is extended
electrically, it must also be retracted
electrically. Under no circumstances
should the valve pintle be tampered with
by hand, screwed, or pushed in, or pulled
out, as damage could occur.
Important
No physical adjustment of the IAC valve assembly
is required after installation. The IAC valve is reset
by the ECM. When the vehicle is operated at normal
engine temperature at approximately 30 mph
(48 km/hr.), the ECM causes the valve pintle to seat in
the throttle body. The ECM then has a reset
procedure to set the correct pintle position. Proper
idle regulation should result.
1.
2.
Install or Connect
Lubricate new o-ring with transmission fluid and
install on IAC valve.
IAC valve to throttle body.
NOTICE:
New IAC valves that have been preset at
the factory should be installed in the
throttle body in an "as is" condition,
without any adjustment.
3. IAC valve attaching screw assemblies that have
been coated with appropriate thread locking
compound.
^ Tighten
4.
5.
• Screw assemblies to 3.2 N-m (28.0 lb. in.).
Electrical connector to idle air control valve.
Start engine and allow engine to reach operating
temperature.
TUBE MODULE ASSEMBLY
Replacement (Figure C 2 - 1 6 )
4-*
Remove or Disconnect
1. Tube module assembly attaching screws.
2. Tube module assembly.
3. Tube module assembly gasket and discard.
Clean
• Old gasket material from surface of throttle body
assembly to insure proper seal of new gasket.
[••4-j
Install or Connect
1. New tube module assembly gasket.
2. Tube module assembly
3. Tube module assembly attaching screws.
^ Tighten
Screw assemblies to 3.0 N-m (28.0 lb. in.).