1991 Audi 100 BaseFACTORY OEM SERVICE PROCEDURE

Fuel Pump

NOTE: Fuel pump performance is a measurement of fuel pressure and volume availability, not regulated fuel pressure.
FUEL PUMP PERFORMANCE

Application Pressure psi (kg/cm2 ) Volume in 30 sec. Pts. (L)
2.2L Turbo 84-96 (5.9-6.7) (1) 2.1 (1.0)
2.3L 89-94 (6.3-6.6) (2) 2.1 (1.0)
(1) Pressure must NOT drop below 44 psi (3.1 kg/cm2 ) after 10 minutes, or 41 psi (2.9 kg/cm2 ) after 20 minutes.
(2) Pressure must NOT drop below 51 psi (3.6 kg/cm2 ) after 10 minutes, or 49 psi (3.4 kg/cm2 ) after 20 minutes.
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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.