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1990 VIN Number breakdown Available Engines in 1990
Available Transmissions in 1990 1990 Rear Axle and Gear Identification
1990 IROC-Z Dimensions 1990 Computer Trouble Codes
1990 Exterior Color Information 1990 Interior Color Information
1990 Factory Options (RPO's) View the 1990 Showroom Brochure
1990 IROC-Z Key Points of Interest

1990 Total Produced (RPO FZAx)

5,507

 Dealership Sticker Price

$20,400

 

1990 VIN Breakdown Example:    1G1FP31E2LL100001

1G1

FP 3 1 E 2 L L 100001
1-3 Digits 4th & 5th Digits 6th Digit 7th Digit 8th Digit 9th Digit 10th Digit 11th Digit 12-17 Digits

G.M Make Identifiers

1G1=Chevy/USA

2G1=Chevy/Canada

Camaro Model

Sport Coupe or Z28

Body Type

1=2dr coupe

2=2dr hatchback

3=two door convertible

Restraint Code

1=Manual Belts

Engine Code

See Below

Check digit VIN position

Model Year 1990

Assembly Plant Code

N-Norwood, Ohio

L-Van Nuys, Cal.

Number in line at assembly plant

1xxxxx--Norwood

4xxxxx--Van Nuys

 

Available Engines in 1990

RPO #

Liter Injection C.I.D. H.P. Rating Engine Code # Produced
B2L/L98 5.7 Tuned Port Injection 350ci 245hp 8 2,415
LB9 5.0 Tuned Port Injection 305ci 210hp F 3,092
L03 5.0 Fuel Injection 305ci 170hp E 16,736

 

Available Transmissions in 1990

RPO #

Type Specifications ID # Produced
MXO Auto 4 Speed with OD 700R4 31,630
Man 77mm 5 Speed*

* Note: The 4 speed manual transmission was only available in 1985 and discontinued in 1986

1990 Rear Axle and Gear Identification

The code to identify your axle gear is located on the front face of the right hand axle tube about three inches from the differential cover.

Number Decode

A typical code could be 8HF 0 103 2 - The initial number and next two letters (8HF) indicate the axle code, here a 1990 Posi with a 3.08 axle ratio. The next number or letter (0) identifies the manufacturer, the next three digit number (103) indicates the date of manufacture, and the final digit (2) indicates the shift that this rear was produced.

Axle Code

Axle Ratio

Axle Type

8HP 2.73 Standard
8HT, 8RC 2.73 Posi
8HK 3.08 Standard
8HF, 8HB 3.08 Posi
2PM, 2PN 3.23 Posi
8HL 3.42 Standard
9EQ* 3.27 Posi
9ER* 3.45 Posi

* Denotes Borg-Warner Axle

 

1990 Dimensions

Length Height Width Wheelbase
192.0 Inches 50.4 Inches 72.8 Inches 101.0 Inches

 

1990 Computer (ECM) Trouble Codes

There is a way to read the codes by counting the flashes, but I would recommend simply going to some auto parts store and buying a GM code reader that plugs into your car. They are around $20.00

Code

Circuit or System

Probable Cause

12 No distributor reference pulse This code will flash whenever the diagnostic terminal is grounded with the ignition On and the engine not running. If additional trouble codes are stored, they will appear after this code has flashed three times.
13 Oxygen Sensor Circuit Sticking Throttle Position Sensor; Poor electrical connection; open or short circuit; defective oxygen sensor;defective ECM.
14 Coolant Temperature Sensor Circuit Engine overheating; poor electrical connection, open or short in circuit; defective coolant temperature sensor; defective ECM.
15 Coolant Temperature Sensor Circuit Poor electrical connection, open or short in circuit; defective coolant temperature sensor; defective ECM.
21 Throttle Position Sensor Sticking or misadjusted TPS; poor electrical connection, open or short in circuit; defective TPS; defective ECM.
22 Throttle Position Sensor Sticking or misadjusted TPS; poor electrical connection, open or short in circuit; defective TPS; defective ECM.
23-Carbureted Models Mixture Control Solenoid Open circuit or short to ground in the mixture solenoid circuit; defective ECM-if the mixture control solenoid is shorted to ground, the ECM may have been damaged.
23-Fuel Injected Models Manifold Air Temperature Sensor Poor electrical connection, open or short in circuit; defective MAT sensor; defective ECM.
24 Vehicle Speed Sensor Poor electrical connection, open or short in circuit; defective VSS; defective ECM; a fault in this circuit should be indicated only when the vehicle is in motion. Disregard Code 24 if it is set when the drive wheels are not turning.
25-Fuel Injected Models Manifold Air Temperature Sensor Poor electrical connection, open or short in circuit; defective MAT sensor; defective ECM.
32-Carbureted Models Differential Pressure Sensor Defective differential pressure sensor; poor electrical connection, open or short in circuit; defective ECM.
32-Fuel Injected Models(V8 nly) EGR System Restricted vacuum hose to EGR solenoid or valve; poor electrical connection, open or short in circuit; defective EGR solenoid; defective EGR valve; defective ECM.
33-(All except 1989 & earlier MPFI V6 and TPI V8) MAP Sensor Leaking or restricted vacuum hoses; poor electrical connection, open or short in circuit; defective MAF sensor; defective ECM.
33-(1989 and earlier MPFI V6 & TPI V8) MAF Sensor Poor electrical connection, open or short in circuit; defective MAF sensor; defective ECM.
34-Carbureted Models Differential Pressure Sensor Leaking or restricted vacuum hoses; poor electrical connection, open or short in circuit; defective differential pressure sensor; defective ECM.
34-Fuel Injected Models-(except 1989 & earlier MPFI V6 & TPI V8) MAP Sensor Leaking or restricted vacuum hoses; poor electrical connection, open or short in circuit; MAP sensor; defective ECM.
34-(1989 & earlier MPFI V6 & TPI V8) MAF Sensor Poor electrical connection, open or short in circuit; defective MAF sensor; defective ECM.
35 Idle Speed Control TPS sticking or misadjusted; poor electrical connection, open or short in circuit; defective IAC valve; defective ECM.
36-(1989 & earlier MPFI V6 & TPI V8) MAF Sensor Burn-Off circuit Poor electrical connection, open or short in circuit; defective MAF sensor burn-off relay; defective MAF sensor; defective ECM.
41-Carbureted Models No distributor reference pulses to ECM with engine running Poor electrical connection, open or short in circuit; defective distributor pick up coil; fault in the MAP or differential pressure sensor circuit.
41-Fuel Injected Models Cylinder Select error Incorrect or defective MEMCAL or ECM.
42 Electronic Spark Timing Poor electrical connection, open or short in circuit; defective ignition module; defective ECM.
43 Electronic Spark Timing Poor electrical connection, open or short in circuit; defective ESCmodule; defective knock sensor; defective ECM.
44 Lean Exhaust Lean condition caused by malfunctioning carburetor/fuel injector, vacuum leak, low fuel pressure, etc.; poor electrical connection, open or short in circuit; defective MAP sensor; defective oxygen sensor; defective ECM.
45 Rich Exhaust Rich condition caused by restricted air filter, fuel in evaporative charcoal canister or crankcase, malfunctioning carburetor/fuel injector, high fuel pressure, etc.; defective TPS; defective MAP sensor; defective oxygen sensor; defective ECM. 
46 Vehicle Anti-Theft System(VATS) Poor electrical connection, open or short in circuit; incorrect ignition key or starting procedure; defective VATS module; defective ECM.
51 PROM - ECM chip Defective PROM; PROM not properly installed; incorrect PROM installed; defective ECM.
52 Fuel CALPAK Defective CALPAK; CALPAK not properly installed; incorrect CALPAK installed.
53 EGR Control Leaking, restricted or improperly routed vacuum line; EGR valve stuck or leaking; poor electrical connection, open or short in circuit; defective EGR solenoid; defective ECM.
53 System Over Voltage Charging system problem.
54 Mixture Control Solenoid Open circuit or short to ground in the mixture solenoid; defective ECM-If the mixture control solenoid is shorted to ground, the ECM may have been damaged.
54 Fuel Pump Circuit Defective fuel pump; defective fuel pump relay; defective oil pressure switch; poor electrical connection, open or short in circuit; defective ECM.
55 ECM Poor electrical connection, open or short in circuit; defective ECM.
61 Oxygen Sensor Contaminated Oxygen Sensor.

 

1990 Exterior Color Information
The exterior color RPO should be a number followed by the letter U, ie. 40U = White
Code Exterior Colors # Produced Available Interior Colors
40 White 6,878 BK, BR, G, R
41 Black 5,125 BK, G, R
98 Bright Blue 5,069 BK, G
23 Light Blue 2,539 BK, G
87 Medium Gray 2,787 BK, G, R
81 Bright Red 8,168 BK, BR, G, R
75 Dark Red 4,420 BK, BR, G, R

Color Codes: BK=Black, BR=Light Brown, G=Gray, R=Red

1990 Interior Color Information

The interior RPO will be listed as follows

RPO

Color

19B Black - Standard Cloth
19C Black - Custom Cloth
66B Light Brown - Standard Cloth
66C Light Brown - Custom Cloth
622 Light Brown - Leather
73B Red - Standard Cloth
73C Red - Custom Cloth
732 Red - Leather
82B Gray - Standard Cloth
82C Gray - Custom Cloth
822 Gray - Leather

 

1990 Factory Option RPO (Regular Production Order) Numbers & Costs

Your RPO's can be found on a decal inside the center glovebox
RPO # Description Quantity Cost RPO # Description Quantity Cost

1FP87

Camaro IROC-Z Sport Coupe, V8(RPO Z28) 4,213

$14,555.00

MX0 Transmission, Auto with OD 31,630 515.00

1FP87

Camaro IROC-Z Sport Coupe Conv)RPO Z28) 1,294

20,195

N96 Wheels, Aluminum, 15in standard/ 16in optional 4,004 520.00
1LE Special Perf Components Pkg 62 n/a QLC Tires, P245/50ZR16  Blackwall 4,004 nc
AG9 Power Seat, Driver Side 4,876 n/a QPH Tires, P245/50R16  Blackwall 29,479 nc
AM9 Seat Back, Split Folding Rear 20,840 50.00 QYZ Tires, P215/65R15 Blackwall 1,503 n/a
AU3 Power Door Locks 32,591 175.00 UL5 Radio, Delete 221 -165.00
A31 Power Windows 22,497 n/a UM6 Radio, Stereo,Tape,Clock, s/s,eq 31,421 n/a
A90 Power Hatch Release 23,410 50.00 UM7 Radio, Stereo,Clock, s/s,eq 1,098 n/a
B2L Engine, 350ci, 220hpV8/IROC 2,415 n/a UU8 Radio, Stereo,Delco Bose 994 n/a
B34 Floor Mats, Front 32,673 n/a UX1 Radio,Stereo,Cassette,Clock, s/s,eq 1,249 n/a
B35 Floor Mats, Rear 32,673 n/a U1C Radio, Compact Disc w/ Clock 3 n/a
B84 Moldings, Body Side 32,856 n/a U75 Antenna, Power 1,275 70.00
CC1 Roof Panels, Removable Glass 12,476 866.00 YF5 Emission Equipment 6,345 100.00
C49 Defogger, Rear Window 19,436 160.00 FCAB RS Coupe Base Group       nc
C60 Air Conditioning 34,247 805.00 FCA1 RS Coupe Group 1       1,410.00
DC4 Mirror, w/ Dual Reading Lamps 32,963 n/a FCA2 RS Coupe Group 2     1,782.00
DE1 Louvers, Rear Window 1,855 210.00 CCAB RS Coupe Conv Base Group     nc
DG7 Mirrors, Electric Twin Remote 8,188 91.00 CCA1 RS Group Convertible Group 1    1,040.00
DX3 Decal and Stripe Delete 359 -60.00 CCA2 RS Group Convertible Group 2     1,640.00
D42 Cover, Rear Comp. Cargo 20,626 n/a FZAB IROC-Z Coupe Base Group    nc
G80 Rear Axle, Limited Slip 5,507 100.00 FZA1 IROC-Z Coupe Group 1     865.00
G92 Rear Axle, Performance Ratio 2,710 466.00 FZA2 IROC-Z Coupe Group 2     1,759.00
J65 Brakes, Power F&R Disc 2,710 179.00 FZA3 IROC-Z Coupe Group 3    2,143.00
KC4 Cooler, Engine Oil, IROC only 2,710 110.00 CZAB IROC-Z Convertible Base Group     nc
K05 Heater, Engine Block 828 20.00 CZA1 IROC-Z Convertible Group 1    865.00
K34 Speed Control, with Resume 32,579 n/a CZA2 IROC-Z Convertible Group 2    1,640.00
LB9 Engine, 305ci, 190hp, V8 3,092 745.00 CZA3 IROC-Z Convertible Group 3     2,001.00
L03 Engine, 305ci, 170 hp, V8 16,736 350.00

View the 1990 Chevrolet Camaro Showroom Brochure


~ 1990 IROC-Z Key Points of Interest ~