1988 PONTIAC FIERO Service Repair Manual

6E-16 DRIVEABILIW AND EMISSIONS - FUEL INJECTION
BODY BODY
1. OPEN SECONDARY LBCK YlNGE ON CONNECTOR
2. REMOVE TERMINAL USING TOOL
PUSH TO
RELEASE
A. SLIP NEW SEAL ONTO WIRE.
EAL
6. PUSH TERMINAL AND CONNECTOR AND
ENGAGE LOCKING TANGS.
Figure
6 - Weather-Pack Terminal Repair
Compact Three
The compact three connector, which looks similar
to a Weather-pack connector, is not sealed and is used
where resistance to the environment is not required.
This type of connector most likely is used at the air
control solenoid, Use the standard method when
repairing a terminal. Do not use the Weather-pack
terminal tool J-28742,
Melri-Pack Series 150 - Terminal Removal
Some connectors used to connect various sensors
to the ECM harness use terminals called "Metri-Pack"
(Figure 7). These may be used at the Coolant Sensors
as well as at ignition modules.
They are also called "Pull-To-Seat" terminals
because, to install a terminal on a wire the wire is first
inserted through the seal (5) and, connector
(4). The
terminal is then crimped on the wire, and the terminal
pulled back into the connector to seat it in place.
To remove a terminal:
1. Slide the seal back on the wire,
2. Insert tool (3) BT-8518 or
J 35689, or
equivalent, as shown in insert "A" and "B"
to release the terminal locking tang (2).
3. Push the wire and terminal out through
the connector.
If you are reusing the terminal, reshape the
locking tang (2).
Micro-Pack
Some connectors used on harness to connect to the
ECM are called Micro-Pack (Figure 8). Terminal
replacement requires the use of special tool
5-33095,
BT-8234-A or equivalent.
1. METRI-PACK SERIES 3. TOOL 135689 OR BT-8446
150 FEMALE TERMINAL 4. CONNECTOR BODY
2. LOCKING TANG 5. SEAL
Figure
7 - Metri-Pack Series 150 Terrninal Removal

DRIVEABILITY AND EMISSIONS - FUEL INJECTION 6E-17
ON THE CABLE TO REMOVE TERMINAL. 4. VISUALLY CHECK TERMINAL AND
REPLACE IF TERMINAL CAVITY OR TANG
- -- IS DAMAGED. 5. INSTALL TERMINAL INTO CONNECTOR . 1. GRASP CABLE AND PUSH 1 ERMINAL CAVITY UNTIL LOCKING TANG HAS
TO THE MOST FORWARD POSITION.
SNAPPED INTO POSITION.
2. INSERT TOOL 533695 STRAIGHT INTO
THE FRONT OF THE CONNECTOR CAVITY.
DO NOT USE CONVENTIONAL
PICK TO REMOVE
TERMINAL.
0321 84. 5% 1418-6E
Figure 8 - Micro-Pack Terminal Replacement
TOOLS NEEDED TO SERVICE THE SYSTEM
The system requires an ALDL read-out ("Scan")
tool, tachometer, test light, ohmmeter, digital
voltmeter with 10 megohms impedance
(5-2912514,
J-34029A or equivalent), vacuum gage and jumper
wires for diagnosis. A test light or voltmeter must be
used when specified in the procedures. They must
NOT be interchanged. See Figures 9 through 13 for
Special Tools needed to diagnosis or repair a system.
For more complete information on the operation of
these tools, see the manufacturer's instructions.

6E-18 DRIVEABILITY AND EMISSIONS - FUEL INJECTION
VOLTMETER - Voltage Position Measures amount of
voltage. When connected in parallel to an existing
circuit.
A digital voltmeter with 90 meg ohm input
impedence
is used because this type of meter will
not load down the circuit and result in faulty
AMMETER -When used as ammeter, this meter also
accurately measures extremely low current flow.
Refer to
meter instructions for more information.
Selector
must be set properly for both function
and range.
DC is used
for most automotive
measu rements.
OHMMETER - Measures resistance of circuit directly
in ohms. Refer to meter for more information.
@ Ob Display in all ranges indicates open circuit.
Zero display in all ranges indicates
a short
@ Intermittent connection in circuit may be
indicated by digital reading that will not
stabilize on circuit.
Range Switch.
HIGH IMPEDANCE MULTIMETER ZOOn - Reads ohms directly
2KfZOKfZ00KR - Reads ohms in thousands
ZM and ZOMn - Reads ohms in millions
Used to check wiring for complete circuit and short to
ground or voltage.
"FACHOMETER
Use inductive trigger signal pickup type to check RPM.

DRIVEABILITY AND EMISSIONS - FUEL INJECTION 6E-19
OXYGEN SENSOR WRENCH
Used to remove or install the oxygen sensor.
IDLE AIR CONTROL WRENCH
Used to remove or install IAC valve on throttle body.
PORT FUEL INJECTION DIAGNOSTIC KIT
Used to diagnose poPt fuel injection systems.
The kit includes:
@ Fuel Pressure Gage -to check fuel pump pressure
and compare injector pressure drop for equal fuel
distribution. lnjector Test Light -to check electrical circuit to an
injeclor.
@ Injector Tester - to energize each fuel injector for a
precise amount of time to perform injector balance
test in
CHART C-2A by checking each injector's
pressure drop using pressure gage.
FUEL PRESSURE GAGE
Used to check and monitor fuel line pressure of port
fuel system.
Part of Diagnostic Kit 134730-A
INJECTOR TEST LIGHT
Used to check electrical circuit to a port fuel injector
Pae of Diagnostic Kit 134730-A
INJECTOR TEST LIGHT
Used to check eledrical circuit to a TBI fuel injector
(except
TBI 700)
INJECTOR TEST LIGHT
Used to check electrical circuit to a TBI 700 fuel
injector and a port fuel injector.
5-2-86
75 3396-6E

6E-20 DRIVEABILITY AND EMISSIONS - FUEL INJECnION -
SPARK TESTER
Use to check available secondary ignition voltage .
Jf 6792lBT7228- 1 Also called an ST125.
MADS AIR FLOW (MAF) SENSOR PESTER
Used for static test of MAF Sensor on vehicles
equipped
with an PJC type MAF Sensor.
CRANKSHAFT SENSOR ALIGNMENT TOOL (C31 SVSf EMS)
Used "t properly align crank or combination sensor to
harmonic balancer interrupter.
connecting them to a new
ECM. Measures the circuit
OIL PRESSURE TRANSDUCER WRENCH
Used to remove or install oil pressure transducer on
J28687-AlBTS228
Used to remove 150 series Metri-Pack "pull-to-seat "
terminals from connectors. Refer to wiring harness
Used to remove Terminals
from Weather Pack
Refer
to wiring harness service Section 6E for removal

DRIVEABILITY AND EMISSIONS - FUEL INJECTION 6E-21
Used to adjust 1SC on carburetor to obtain maximum
Used
to test operation of IS6 Motor on carburetor in
either direction, and condition of the internal switch.
FLOAnLEVEL CACE SET
Used to check float level on 2SE or EZSE carburetor.
FLOAT LEVEL CACE
Used to check float level or MIC Solenoid travel on
EZME or E4ME carburetor.
IDLE MIXTURE SOCKET
Used to adjust idle mixture needle on an EZSE
J29030-BlBT7610B
MIXTURE ADJUSTMENUPOOL
Used to adjust lean mixture and rich mixture stop
screws
sn EZSE, EZME, and E4ME carburetors.
CARBURETOR ADJUSTMENT WRENCH
Used to adjust idle mixture on carburetor
MIC SOLENOID CAGING TOOL
Used to adjust the Mixture Control Solenoid plunger
on
EZME, and E4ME carburetors.
J33815-1IBT8253-A

6E-22 DRIVEABILITY AND EMISSIONS - FUEL INJECnIBN
NJECTOR TESTER
Used to energize each fuel injector for a precise
amount of time to perform injector balance
test in
CHART
C-ZA by checking each injector's pressure drop
using pressure gage. Part of Diagnostic
Kit J34730-A.
FUEL LINE WRENCH
Used to disconnect or conned fuel lines at Throttle
MINIMUM AIR RATE ADJUSTING WRENCH
Used to adjust throttle stop screw on TBI unit.
FUEL PRESSURE GAGE
Used to check and monitor fuel line pressure of port
AIR BLEED VALVE GAGING TOOL
Used to adjust Idle Air Bleed Valve on EZME, and
E4ME carburetors.
PUMP LEVER PIN PUNCH
Used to drive pump lever pin inward to allow removal
J25322IBT7523 of the pump lever on E2ME carburetor.

DRIVEABILITY AND EMISSIONS - FUEL INJECTION 6E-23
GENERAL SPECIFICA"I0NS
Many of the specifications used in this section are located on the Vehicle Emission
Control Information label under the hood.
Listed on the chart below are locations of specifications used in this Section.
Engine Timing
Vehicle Emission Control information label.
--
Idle Speed, ECM Controlled
Not adjustable. ECM controls idle.
Spark Plug Type
See Owner's Manual, Section
"7".
Spark Plug Gap
Vehicle Emission Control Information Label.
Engine Code
8th digit of VIN number. See Section
"OA". Also Owner's
Manual, Section
"7".
Engine Family
Vehicle Emission Control Information label.
Filter Part Numbers
See Owner's Manual, Section
"7".
Part Numbers of
WDD-GM Parts Book.
Major Components
Replacement of WDD-GM Label Catalog.
Vehicle Emission
Control Information Label