PONTIAC FIERO 1988 Service Repair Manual

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

EXHAUST SYSTEM 6F-1
SEC"B0N 6F
EXHAUST SYSTEM
CAUTION: Exhaust system components should avoid overheating and possible damage to the
have enough clearance from the underbody to passenger compartment carpets.
................................. General Description 6F- 1 Hanger ............................................................ 6F- I
..................... ....................... Exhaust Pipe .. 6F- I Clamp ............................................................ 6F- I
Muffler .......................................................... 6F- 1 Catalytic Converter ......................................... 6F- 1
.......................... Resonator ........................... .. 6F- 1
GENERAL DESGRIP"F0N
When inspecting or replacing exhaust system
components, make sure there is adequate clearance
from all points on the underbody to avoid possible
overheating of the floor pan and possible damage to the
passenger compartment insulation and trim materials.
Check complete exhaust system and nearby body
areas and trunk lid for broken, damaged, missing or
mispositioned parts, open seams, holes, loose
connections or other deterioration which could permit
exhaust fumes to seep into the trunk or passenger
compartment. Dust or water in the trunk may be an
indication of a problem in one of these areas. Any
defects should be corrected immediately. To help
insure continued integrity, the exhaust system pipe
qever a
rearward of the muffler must be replaced whe.-
new muffler is installed.
EXHAUST PlPE
The exhaust manifold to crossover pipe
connections are of the ball type, thus eliminating the
need for gaskets.
MUFFLER
The mufflers are a tri-flow design. Some muffler
installations have a slot in the inlet and/or outlet pipe
which indexes to a key (tab) welded on the exhaust
and/or tail pipe to help maintain alignment.
RESONATOR
A resonator is used on some series exhaust
systems. It allows the use of mufflers with less back
pressure and provides for optimum tuning
characteristics of the exhaust system. The
installation of exhaust system supports is
very important as improperly installed supports can
cause annoying vibrations which are difficult to
diagnose.
CLAMP
Two methods are used for connecting exhaust
system slip joins, (1) clamp and
(2) weld. When
servicing a welded connection it should be cut and the
new connection clamped when installing replacement
parts. Also, coat slip joints with exhaust system sealer
before assembling (Fig. 1).
SLOT IN PlPE
9/16 EXH. CROSSOVER TO EXH. PlPE 318 REMAINING JOINTS
EXHAUST SYSTEM U-BOLT CLAMPS
POSITION CLAMP AS SHOWN IN RELATION TO SLOT TO PREVENT GAS LEAKS ,,ooo,.,,
Fig. 1 Installation of Exhaust System Clamp
CATALYTIC CONVERTER
The catalytic converter is an emission control
device added to the exhaust system to reduce
pollutants from the exhaust gas stream.
NOTICE: THE CATALYTIC CONVERTER
REQUIRES THE USE OF UNLEADED FUEL
ONLY.
HANGER Periodic maintenance of the exhaust system is not
T~~ types of hangers are used to support the required, however, if the car is raised for other service,
exhaust system. one type is a conventional rubber it is advisable to check the general condition of the
strap and the second type is a "rubber block." The catalytic converter, pipes and mufflers.
rubber block type provides a rigid hanger along with Three
different converter designs are used in
a feature that continues to support the exhaust system combination with two different types of catalyst.
in the event a rubber insulator block is broken. Converter Designs:

6F-2 EXHAUST SYSTEM
, 1 -AIR MANAGEMENT SVSTEM 6- REAR BED
7-THREE-WAY
3-METAL
MESH 8-FRONT BED
5-OXIDATION
Fig. 2 Dual Bed Monolith
Dual Bed Monolith
Single Bed Pellet
Dual Bed Pellet
Catalyst Types:
Oxidation Catalyst
Three-Way (Reduction) Catalyst
1 - INSULATION 8- INLET GAS
2- OUTER WRAP 9- CATALYTIC PELLET
3- CONVERTER SHELL
. COMPoIJND
4- CATALYST 10- OUTLET
5- INSULATION
6- BED SUPPORT
Fig. 3 Single Bed Pellet
The oxidation catalyst is coated with a catalytic
material containing platinum and palladium which
lowers levels of hydrocarbon (HC) and carbon
monoxide (CO). The catalyst coating on the three-way
(reduction) catalyst contains platium and rhodium
which lowers levels of oxide of nitrogen (NOX) as well
as hydrocarbons (HC) and carbon monoxide
(CO).
2- OUTLET 7- INSULATION I 3- OXIDATION CATALYST 8- FlLL PLUG I 4- INLET 9- INSULATION L
5- RETAINER 10- AIR PLENUM
11- AIR INLET 12- FILL PLUG
(AIR MANAGEMENT SYSTEM)
5200W8F
Fig. 4 Dual Bed Pellet

EXHAUST SYSTEM 6F-3
1. MANIFOLD 8. INTERMEDIATE EXHAUST 13. CONVERTER ASSEMBLY 2. SEAL PIPE ASSEMBLY 14. 60 Nvrn (44 LBS. FT.)
3. CROSSOVER PIPE 9. 50 N-rn (37 LBS. FT.) 15. FRONT EXHAUST 4. 20 N-m (15 LBS. FT.) 10. HANGER PIPE
5. UNDERBODY 11. INNER BRACKET
6. 10 N-m (8 LBS. FT.) ASSEMBLY
7. MUFFLER 12. TRANSMISSION
J10001-6F-F
Fig. 5 Exhaust System - V.I.N. S

1. UNDERBODY
2. 10
N.rn (8 LBS. FT.)
3. MUFFLER
4. INTERMEDIATE EXHAUST
5. 60 Nern (44 FT. LBS.)
6. CONVERTER ASSEMBLY
7. 20
N-rn (15 FT. LBS.)
8. 50 N-rn (37 LBS. FT.)
9. TRANSMISSION
10. FRONT EXHAUST
PlPE
11. MANIFOLD
12. CROSSOVER
PlPE
13. SPACER
Fig. 6 Exhaust System - V.I.N. F, E and 8

HYDRAULIC DIAGNOSIS 700.R4-1
SECTION 700-R4
AUTOMAT C TRANSM
CONTENTS
GENERAL DESCRIPTION
The THM 700-R4 is a fully automatic
transmission for rear wheel drive vehicles which
provides four forward gear ranges and a reverse.
The major components of this transmission are:
e Torque Converter Clutch Asm.
e Vane Type Oil Pump
e 2-4 Band Asm.
e Five Multiple Disc Clutches
0 Two Planetary Gear Sets
0 One Sprag Clutch
0 One Roller Clutch
e Valve Body Asm.
The oil pressure and shift points are controlled by
throttle opening via a throttle valve cable. (See Section
7A1 for T.V. cable information).
The transmission can be operated in any one of
the following seven modes:
P
- Park position prevents the vehicle from rolling
either forward or backward. (For safety reasons the
parking brake should be used in addition to the park
position).