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 MANUALSAUDI199590 QUATTRO SPORT V6-2.8L (AAH)REPAIR AND DIAGNOSISSPECIFICATIONSPRESSURE, VACUUM AND TEMPERATURE SPECIFICATIONSEMISSION CONTROL SYSTEMSSYSTEM SPECIFICATIONS
1995 Audi 90 Quattro Sport V6-2.8L (AAH)
System Specifications
1995 Audi 90 Quattro Sport V6-2.8L (AAH)SECTION System Specifications
ENGINE OPERATING TEMPERATURE 85° - 100°C (185° - 210°F)
EVAP. BREATHER/VENT VALVE PRESSURE 0.02 - 0.3 bar (0.3 - 4.4 psi)
FUEL TANK SEALING CAP PRESSURE 0.3 - 0.4 bar (5 - 5.8 psi)
FUEL SYSTEM OPERATING PRESSURE
Pressure regulator vac. hose disconnected 3.8 - 4.2 bar (55 - 70 psi)
Vac. connected & 18 - 20" Hg vacuum 3.4 - 3.7 bar (49 - 54 psi)
FUEL SYSTEM RESIDUAL PRESSURE
Cold engine 2.2 bar (32 psi) minimum
Warm engine 3.0 bar (44 psi) minimum
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.