Pontiac Fiero 1988 Service Manual page 525

6E2-C1-8 DRIVEABILITY AND EMISSIONS - FUEL INJECTION (TBI)
fTf MAP S E N S O R
|T| BRACKET
RETAINER
7 S 3 2 7 4 - 6 E
Figure C1-11 - MAP Sensor
• 4-
Insfall or Connect
1. Coat threads only with sealant, P/N 1052080 or
equivalent.
2. Sensor In engine, torque to 30 N
#
m (22 lbs. Ft).
3. Electrical connector.
4. Negative battery cable.
5. Refill lost coolant.
MAP SENSOR
(Figure C1-11)
Other than checking for loose hoses and electrical
connections the only service possible Is unit
replacement, If diagnosis shows sensor to be faulty.
MAT SENSOR
Remove or Disconnect
1. Negative battery cable.
2. Electrical connector.
3. Carefully back out sensor.
• 4 -
install or Connect
1. Coat threads only with sealant, P/N 1052080 or
equivalent.
2. Sensor in engine.
3. Electrical connector.
4. Negative battery cable.
OXYGEN SENSOR
(Figure
C 1 - 1 2 )
Important
The oxygen sensor uses a permanently attached
pigtail and connector. This pigtail should not be
removed from the oxygen sensor. Damage or
removal
|T1
ECM H A R N E S S - C O N N E C T O R T O 0
2
S E N S O R
f l 3 ] 0
2
S E N S O R
[22] 0
2
S E N S O R S E A L
4S 0S86-6E
Figure C1-12 - O x y g e n Sensor
of the pigtail or connector could affect proper
operation of the oxygen sensor. Take care when
handling the oxygen sensor. The in-line electrical
connector and louvered end must be kept free of
grease, dirt or other contaminants. Also, avoid using
cleaning solvents of any type. Do not drop or roughly
handle the oxygen sensor.
The oxygen sensor may be difficult to remove
when engine temperature is below 48°C (120°F).
Excessive force may damage threads in exhaust
manifold or exhaust pipe.
Remove or Disconnect
1. Negative battery cable.
2. Electrical connector.
3. Carefully back out oxygen sensor.
Install or Connect
1.
2.
3.
4.
Important
A special anti-seize compound is used on the
oxygen sensor threads. The compound consists of a
liquid graphite and glass beads. The graphite will
burn away, but the glass beads will remain,
making the sensor easier to remove.
New or service sensors will already have the
compound applied to the threads. If a sensor is
removed from an engine, and, if for any reason it is
to be reinstalled, the threads must have anti-seize
compound applied before reinstallation.
Coat threads of oxygen sensor with anti-seize
compound P/N 5613695 or equivalent if necessary.
Sensor, and torque to 41 N.m (30 ft. lbs.).
Electrical connector.
Negative battery cable.