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Direct petrol injection and ignition system (8-cyl. 4.2 ltr. 4-valve), RS 4 >
< Checking exhaust flap
A4 Mk2
Power unit
8-cylinder direct petrol injection engine (4.2 ltr. 4-valve RS 4), mechanics
Exhaust system
Exhaust flap
Checking vacuum unit for exhaust flap
Checking vacuum unit for exhaust flap
Checking vacuum unit for exhaust flap
Special tools and workshop equipment required
t
Hand vacuum pump -VAS 6213- or hand vacuum pump with attachments -V.A.G 1390-
Procedure
–
Disconnect hose at vacuum unit for exhaust flap on relevant rear silencer.
–
Connect hand vacuum pump -V.A.G 1390- or -VAS 6213- to vacuum unit.
–
Use hand vacuum pump to generate vacuum.
l
Linkage should move forwards.
–
Vent hand vacuum pump.
l
Linkage should move backwards.
If the linkage does not move:
–
Check linkage for ease of movement and check vacuum unit for leaks.
Power unit
8-cylinder direct petrol injection engine (4.2 ltr. 4-valve RS 4), mechanics
Exhaust system
Exhaust flap
Checking vacuum unit for exhaust flap
Direct petrol injection and ignition system (8-cyl. 4.2 ltr. 4-valve), RS 4 >
< Checking exhaust flap