ENGINE PERFORMANCE – Pontiac Firebird 1998 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

3.8L

3.8L (VIN K), Engine Performance Wiring Diagrams (1 of 4) for Pontiac Firebird 1998

List of elements for 3.8L (VIN K), Engine Performance Wiring Diagrams (1 of 4) for Pontiac Firebird 1998:

• (front of engine) g125
• (fwd lamp harn, 5 cm from underhood electrical center breakout)
• (left side of cyl block) knock sensor (ks) bank 1
• (right of steering column) data link connector
• 1-2 shift sol control
• 18x ref
• 18x reference
• 2-3 shift sol control
• 2nd gear ind ctrl
• 3x ref
• 3x reference
• Bank 1 ks input
• Bank 2 ks input
• Battery
• Bypass
• Ckp 18x sig
• Ckp sync sig
• Cmp input
• Cmp output
• Cmp signal
• Cooling fan system
• Cruise control
• Cruise disable/inhibit in
• Cruise module, radio & inst cluster
• Data link connector (right of steering column)
• Ect sensor ground
• Egr control ground
• Egr pos sensor ground
• Eng ctrl fuse 15a
• Evap purge valve cont
• Evaporative emissions (evap) canister purge solenoid valve (right front of eng)
• Fuel inj 1 control
• Fuel inj 2 control
• Fuel inj 4 control
• Fuel inj 5 control
• Fuel inj 6 control
• G114 (rear of left cylinder head)
• G125 (front of engine)
• Generator status
• Ground
• Hi speed cool fan cont
• Ho2s 1 low
• Ho2s 2 low
• Hot at all times
• Hot in run and start
• Hot in run, bulb test and start
• Iac coil b high
• Iat sensor ground
• Ign
• Ign control
• Ign voltage
• Ignition
• Ignition control
• Ignition control (ic) module (at front end of left cylinder head)
• Instrument cluster system
• Instrument cluster system (tach signal)
• Knock sensor (ks) bank 2 (right side of cyl block)
• Lo speed cool fan cont
• Maf sensor input
• Map sensor ground
• Mass air flow (maf) sensor (in air duct, front of int manifold)
• Pcm batt fuse 10a
• Pcm ground
• Pcm ign fuse 15a
• Pnk
• Pnk a
• Powertrain control module (pcm) (behind right strut tower)
• Red
• Ref low
• Reference low
• S107
• S182
• S184
• Serial data (class 2)
• Serial data (uart)
• Signal
• Stop lamp switch (on brake pedal support)
• Tan
• Tcc switch input
• Tp sensor ground
• Trans range a input
• Underhood electrical center 1 (left front of eng compt)
• Underhood electrical center 2 (left front of eng compt)
• Vehicle speed sensor (vss) (left rear of transmission)
• Vss high
• Vss low
• Vss output

3.8L (VIN K), Engine Performance Wiring Diagrams (2 of 4) for Pontiac Firebird 1998

List of elements for 3.8L (VIN K), Engine Performance Wiring Diagrams (2 of 4) for Pontiac Firebird 1998:

• (under console near shift lever) park/neutral position (pnp) switch
• 1-2 shift sol
• 2-3 shift sol
• 2nd gear ind
• 3-2 shift sol
• A no.1
• A no.2
• A no.3
• A/t fluid pressure manual valve position switch
• A/t fluid temp sensor
• Automatic transaxle (4t65-e)
• Camshaft position sensor (cmp) (engine front cover)
• Crankshaft position sensor (ckp) (lower front of eng)
• Fuel injectors
• G125 (front of engine)
• Hot in run
• Hot in run, bulb test and start
• I/p fuse block
• Inj 1 fuse 15a
• No.4
• No.5
• No.6
• Pnk
• Pressure b control solenoid
• Red
• Rev
• S102 pnk
• S144
• S145
• S207
• Second gear start switch
• Tan
• Tcc pwm sol
• Tcc sol
• Turn b/u fuse 2 20a
• Underhood electrical center 2 (left front of eng compt)

3.8L (VIN K), Engine Performance Wiring Diagrams (3 of 4) for Pontiac Firebird 1998

List of elements for 3.8L (VIN K), Engine Performance Wiring Diagrams (3 of 4) for Pontiac Firebird 1998:

• (top right of engine) evaporative emissions canister vent solenoid valve
• A/c pressure sensor (above right front wheelhouse)
• A10
• B10
• Exhaust gas recirculation (egr) valve (left front of engine)
• Fuel level sensor
• Fuel pump
• Fuel pump fuse 15a
• Fuel pump relay
• Fuel tank pressure sensor (in fuel tank)
• Fuel tank unit
• G125 (front of engine)
• G309 (left door sill)
• Hot at all times
• Intake air temperature (iat) sensor (on air intake duct)
• Manifold absolute pressure (map) sensor (right side of intake manifold)
• Nca
• Pnk
• Red
• S110
• S117
• S121
• Tan
• Throttle position (tp) sensor (on throttle body)
• Underhood electrical center 1
• Underhood electrical center 2

3.8L (VIN K), Engine Performance Wiring Diagrams (4 of 4) for Pontiac Firebird 1998

List of elements for 3.8L (VIN K), Engine Performance Wiring Diagrams (4 of 4) for Pontiac Firebird 1998:

• (front of engine)
• (front of engine) g125
• 2nd gear start sig
• 3-2 sol control
• 5 volt reference a
• 5 volt reference b
• A/c comp relay control
• A/c ref press sensor in
• A/c request
• A/c system
• A/t fluid temp input
• Charging system
• Clutch anticipate sig
• Cruise control
• Cruise control/ clutch anticipate switch (on clutch pedal bracket)
• Cruise status
• Ect sensor input
• Egr pintel position input
• Egr valve control
• Eng oil level sw input
• Eng sen fuse 20a
• Engine coolant temperature (ect) sensor (front of engine)
• Evap solenoid control
• Fuel inj 3 control
• Fuel level input
• Fuel pump relay control
• Fuel tank press sensor
• G114 (rear of left cylinder head)
• G125
• Gauges fuse 9 10a
• Gen term l control
• Heated oxygen sensor bank 1 sensor 1 (on left exhaust manifold)
• Heated oxygen sensor bank 2 sensor 1 (on right exhaust manifold)
• Heated oxygen sensor bank sensor 3 (rear of cat converter)
• Ho2s 1 input
• Ho2s 2 input
• Hot in run, bulb test and start
• Hot in start
• I/p fuse block
• Iac coil a high
• Iac coil a low
• Iac coil b low
• Iat sensor input
• Idle air control (iac) valve (right front of intake manifold)
• Ignition
• Instrument cluster
• Instrument cluster system
• Low oil control
• Map sensor input
• Mil control
• Mil ind
• Nca
• Oil level switch (on engine oil pan)
• Pnk
• Powertrain control module (pcm) (behind right strut tower)
• Press sol high control
• Press sol low control
• Red
• S104
• S108
• S110
• S161
• S206
• Sensor ground
• Starter enable
• Strtr fuse 15a
• Tan
• Tcc pwm sol control
• Tcc sol control
• Tp sensor input
• Trans range b input
• Trans range c input
• Trans range sw p input
• Underhood electrical center 2 (left front of eng compt)

5.7L

5.7L (VIN G), Engine Performance Wiring Diagrams (1 of 4) for Pontiac Firebird 1998

List of elements for 5.7L (VIN G), Engine Performance Wiring Diagrams (1 of 4) for Pontiac Firebird 1998:

• (on transmission) vehicle speed sensor
• 1-2 ss valve ctrl
• 1-4 lmp or 2-3 ss ctrl
• 2nd/3th gear or 3-2 ss
• 375 or 1223
• 587 or 687
• A/c clutch status
• A/c request
• A/c system
• Anti-lock brake system
• B evaporative emission canister vent valve (fwd of fuel tank)
• Body control module (under right side of dash)
• Ckp sens sig in
• Cmp sens sig in
• Cool fan 1 rly ctrl
• Cooling fans system
• Egr sens gnd
• Eng ctrl fuse 15a
• Evap can purge val ctrl
• Evap canister vnt
• Fuel gauge output
• Fuel inj #1 ctrl
• Fuel inj #2 ctrl
• Fuel inj #3 ctrl
• Fuel inj #4 ctrl
• Fuel inj #5 ctrl
• Fuel inj #6 ctrl
• Fuel inj #7 ctrl
• Fuel inj #8 ctrl
• Fuel injectors
• Fuel sending unit gnd
• G114 (rear of left cylinder head)
• Gnd
• Gnd jumper
• Hot in run, bulb test and start
• Hot w/ ign 1 relay energized
• Iat sens gnd
• Ign
• Ign ctrl #1
• Ign ctrl #2
• Ign ctrl #3
• Ign ctrl #4
• Ign ctrl #5
• Ign ctrl #6
• Ign ctrl #7
• Ign ctrl #8
• Ign ctrl sig
• Ignition coil/ module (at top of cylinder)
• Inj1 fuse 15a
• Inj2 fuse 15a
• Instrument cluster system
• Instrument cluster, cruise module, radio
• Low oil lamp ctrl
• Maf sens sig
• Mil ctrl
• Nca
• Plug
• Pnk
• Pnk a
• Pnk s109
• Powertrain control module (behind right strut tower)
• Prnd p
• Red
• Ref lo
• Refrig press sens gnd
• Reverse inhibit sol ctrl
• S100
• S102
• S110
• S122
• S123
• S126
• S182
• Spark
• Tcc/shift sw in
• Tcs spark retard
• Theft deterrent fuel
• Trans range 'a' in
• Trans range 'b' in
• Trans range 'c' in
• Underhood electrical center 2 (left front corner of engine compt)
• Vss hi
• Vss lo
• Vss sig out

5.7L (VIN G), Engine Performance Wiring Diagrams (2 of 4) for Pontiac Firebird 1998

List of elements for 5.7L (VIN G), Engine Performance Wiring Diagrams (2 of 4) for Pontiac Firebird 1998:

• (fwd lamp harn, 8 cm into solenoid breakout)
• (i/p harn, 5 cm from bcm breakout) s234
• (left side of eng, on intake manifold)
• (left side of transmission) reverse inhibit solenoid
• (left side of transmission) skip shift solenoid
• (mil)
• (rear of left cylinder head)
• (top left radiator support)
• A/t
• Air pump fuse 25a
• Air pump relay
• Air sol relay
• B pnk
• E11
• Evaporative emission canister purge valve
• Exhaust gas recirculation valve (upper right front of engine)
• F11
• G108
• G114
• G114 (rear of left cylinder head)
• Gnd
• Hot at all times
• Ign
• Ign ctrl sig
• Ignition coil/ module (at top of cylinder)
• Instrument cluster
• Instrument cluster system
• M/t
• Malfunction indicator lamp
• Mass air flow sensor (top air filter assembly)
• Nca
• Park/ neutral position switch (under console)
• Plug spark
• Pnk
• Pnk c
• Red
• Red a
• Ref lo
• S100
• S107
• S110
• S124
• S125
• S127
• S159
• S177
• S215
• Second- ary air injection pump (on right front frame rail)
• Secondary air injection bleed valve solenoid (on right front frame rail)
• Spark plug
• Stop lamp switch (on brake pedal bracket)
• Under- hood electrical center
• Underhood electrical center 2

5.7L (VIN G), Engine Performance Wiring Diagrams (3 of 4) for Pontiac Firebird 1998

List of elements for 5.7L (VIN G), Engine Performance Wiring Diagrams (3 of 4) for Pontiac Firebird 1998:

• 1-2 shift solenoid
• 2-3 shift solenoid
• 3-2 shift solenoid
• A/c refrig- erant pressure sensor (attatched to refrigerant line)
• A10
• Automatic trans- mission
• Automatic transmission fluid pressure
• B10
• D2 sw
• D3 sw
• D4 sw
• Engine coolant temperature sensor (left side of eng, above generator)
• Fuel level sensor
• Fuel pump
• Fuel pump relay
• Fuel tank pressure sensor
• Fuel tank unit
• G114 (rear of left cylinder head)
• G316 (left door sill)
• Hot at all times fuel pump fuse 20a
• Intake air temperature sensor (on air intake duct)
• Lo sw
• Manual valve position switch
• Nca
• Oil level sensor (left side of oil pan)
• Pessure control solenoid valve
• Pnk
• Red
• Rev sw
• S110
• S244 (i/p harn, near dash pass-through connector)
• Tan
• Tcc pwm solenoid
• Tcc solenoid
• Transmission fluid temp sensor
• Underhood electrical center 1 (left front corner of engine compt)
• Underhood electrical center 2 (left front corner of engine compt)

5.7L (VIN G), Engine Performance Wiring Diagrams (4 of 4) for Pontiac Firebird 1998

List of elements for 5.7L (VIN G), Engine Performance Wiring Diagrams (4 of 4) for Pontiac Firebird 1998:

• (engine harn, 15 cm from map sensor breakout)
• (engine harn, 9 cm from a/t breakout)
• (rear of left cylinder head) g114
• (right side of steering column) data link connector
• 5v feed
• 5v ref
• A/c refrig press sens sig
• Air pump rly ctrl
• Air solenoid rly ctrl
• Bank 1 left front heated oxygen sensor (forward of catalytic converter)
• Bank 1 left rear heated oxygen sensor (rear of catalytic converter)
• Bank 2 right front heated oxygen sensor (front of catalytic converter)
• Bank 2 right rear heated oxygen sensor (rear of catalytic converter)
• C red
• Camshaft position sensor (center rear of eng)
• Connector (right of steering column)
• Cool fan 2 & 3 rly ctrl
• Cooling fans system
• Crankshaft position sensor (behind starter)
• Data link
• Ect sens gnd
• Ect sens sig
• Egr pintle pos
• Egr valve ctrl
• Egr valve gnd
• Eng sen fuse 20a
• Eng speed out
• Front knock sensor (center of eng, below manifold)
• Front ks sig
• Fuel pump relay ctrl
• Fuel tank pressure
• G114 (rear of left cylinder head)
• Gnd
• Gnd jumper
• Hot in run, bulb test or start
• Hot w/ ign 1 relay energized
• Iac coil a high
• Iac coil a low
• Iac coil b high
• Iac coil b low
• Iat sens sig
• Idle air control valve (on throttle body)
• Ign
• Instrument cluster
• Left front ho2s hi
• Left front ho2s lo
• Left level input
• Left rear ho2s hi
• Left rear ho2s lo
• Manifold absolute pressure sensor (rear of intake manifold)
• Map 5v ref
• Map sens gnd
• Map sens sig
• Nca
• Oil level sens in
• Pc sol valve hi
• Pc sol valve lo
• Pcm bat fuse 10a
• Pcm ign fuse 15a
• Pnk
• Powertrain control module (behind right strut tower)
• Rear knock sensor (center of eng, below manifold)
• Rear ks sig
• Red
• Ref lo
• Refrig press sens 5v ref
• Right front ho2s hi
• Right front ho2s lo
• Right rear ho2s hi
• Right rear ho2s lo
• S104
• S106
• S108
• S110
• S116
• S118
• S119
• S185
• Sens gnd
• Sensor gnd
• Serial data
• Serial data (uart)
• Tan
• Tcc pwm sol valve ctrl
• Tcc sol valve ctrl
• Tft sens sig
• Throttle position sensor (right side of throttle body)
• Tp sensor signal
• Underhood electrical center 1
• Underhood electrical center 2