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.
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HOMESERVICE MANUALSSAAB1987900 BASE, 2D HATCHBACK, 2.0 J, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMFUEL INJECTION SYSTEM - CIS (8-VALVE)TESTINGSYSTEM (LINE) PRESSURE
1987 Saab 900 Base, 2D Hatchback, 2.0 J, Automatic
System (Line) Pressure
1987 Saab 900 Base, 2D Hatchback, 2.0 J, AutomaticSECTION System (Line) Pressure
- Close valve on pressure gauge. With engine off, operate fuel pump. Pressure should rise to level specified. See CIS (LAMBDA) FUEL PRESSURES table. If pressure is too low, check fuel pump output.
- Disconnect fuel return line from fuel distributor and run hose from fuel distributor to container. Operate fuel pump and measure output after 30 seconds. See FUEL PUMP OUTPUT SPECIFICATIONS table. If not as specified, check fuel lines, filter, accumulator and pump.FUEL PUMP OUTPUT SPECIFICATIONS
Application 30 Sec. Flow Rate Qts. (L) Saab .94 (.90) - If pressure is too high, check for kinked or blocked fuel return line. If lines are clear, system pressure regulator must be adjusted. Turn pump off, loosen return line fitting. Relieve pressure.
- Loosen line pressure regulator nut. Remove shims, spring(s) and plunger. Raise system pressure by adding shims; lower pressure by removing shims. Be sure "O" rings are in good condition. If piston is scored or damaged, complete fuel distributor must be replaced. See Fig 1 .
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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.