Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Fuel Injector - Contamination Detection: Overview
1987 Saab 9000 L4-1985cc 2.0L DOHCSECTION Overview
86saab03
FILE IN S.I. Man VOL. I
SEC. B-2 PG. 4
Service Information
SUBJECT: ON CAR TESTING AND CLEANING ISSUE: 10/86-902 ELECTRONIC FUEL INJECTORS
APPLICATION: 9000 MODELS
Insufficient detergent gasolines may cause injector contamination (fouling). Stalling, poor starting, rough idle or loss of power complaints may be an indication of dirty or clogged fuel injectors.
This Service Information contains instructions for detecting contaminated fuel injectors (see Fuel Injector Balance Test) and cleaning them if necessary using the Saab Fuel Injector Cleaner/Tester. Read these instructions carefully before proceeding.
Warning! The gasoline and cleaning solution used in this system are extremely flammable and is pressurized during the operation. Have a Class B fire extinguisher handy and keep all solutions away from flame, heaters or machinery which may produce sparks.
A Fuel Injector Balance Test must first be performed before any cleaning takes place. Prior to checking injectors, remember that the timing, pulse relation, compression, dashpot and throttle switch settings must be correctly set.
Notice: To use this device the vehicle fuel system must hold pressure (fuel pressure regulator and fuel pump check valve must be functioning properly). If it does not hold pressure, correct as necessary before proceeding.
Saab Injector Cleaner/Tester P/N 83-94-264
NO SMOKING
Access Fitting * (900 Models) P/N 83-94-280 CAUTION: CONTENTS
Access Fitting * (9000 Models) P/N 83-94-298 UNDER PRESSURE
Liquid Fuel Injector Cleaner P/N 83-94-272
(Case of 12 cans)
* Contained in 83-94-264
FILE IN S.I. Man VOL. I
SEC. B-2 PG. 4
Service Information
SUBJECT: ON CAR TESTING AND CLEANING ISSUE: 10/86-902 ELECTRONIC FUEL INJECTORS
APPLICATION: 9000 MODELS
Insufficient detergent gasolines may cause injector contamination (fouling). Stalling, poor starting, rough idle or loss of power complaints may be an indication of dirty or clogged fuel injectors.
This Service Information contains instructions for detecting contaminated fuel injectors (see Fuel Injector Balance Test) and cleaning them if necessary using the Saab Fuel Injector Cleaner/Tester. Read these instructions carefully before proceeding.
Warning! The gasoline and cleaning solution used in this system are extremely flammable and is pressurized during the operation. Have a Class B fire extinguisher handy and keep all solutions away from flame, heaters or machinery which may produce sparks.
A Fuel Injector Balance Test must first be performed before any cleaning takes place. Prior to checking injectors, remember that the timing, pulse relation, compression, dashpot and throttle switch settings must be correctly set.
Notice: To use this device the vehicle fuel system must hold pressure (fuel pressure regulator and fuel pump check valve must be functioning properly). If it does not hold pressure, correct as necessary before proceeding.
Saab Injector Cleaner/Tester P/N 83-94-264
NO SMOKING
Access Fitting * (900 Models) P/N 83-94-280 CAUTION: CONTENTS
Access Fitting * (9000 Models) P/N 83-94-298 UNDER PRESSURE
Liquid Fuel Injector Cleaner P/N 83-94-272
(Case of 12 cans)
* Contained in 83-94-264
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.