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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSAUDI1998A8 SEDAN (4D2) V8-3.7L (AEW)REPAIR AND DIAGNOSISCRUISE CONTROLTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSCRUISE CONTROL VACUUM SYSTEM, CHECKING FOR LEAKS
1998 Audi A8 Sedan (4D2) V8-3.7L (AEW)
Cruise Control Vacuum System, Checking For Leaks
1998 Audi A8 Sedan (4D2) V8-3.7L (AEW)SECTION Cruise Control Vacuum System, Checking For Leaks
- Remove vacuum hose from vacuum pump and plug hose.
- Remove driver's side instrument panel trim.
- Push in actuator diaphragm and at the same time push brake pedal down to point of resistance.
- Release brake pedal.
- The actuator diaphragm must not move.
NOTE: Incorrectly installed vent valves, leaking actuators or cracks in vacuum hoses can lead to malfunctions.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.