volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Diesel Engine - Poor Throttle Response|Page 4070 > < Diesel Engine - Poor Throttle Response|Page 4068
Page 1
background image

EGR Valve: Testing and Inspection

Exhaust Gas Recirculation (EGR) valve, checking

Special tools and equipment

^

VAG 1390 Hand vacuum pump

Test sequence
-

Remove engine cover.

-

Disconnect pipe between Charge Air cooler and intake manifold at intake manifold.

-

Disconnect vacuum hose from EGR valve.

-

Connect VAG 1390 hand vacuum pump to EGR valve.

-

Operate pump and observe membrane rod.

-

Membrane rod must move in direction of arrow.

-

Disconnect hand vacuum pump hose from EGR valve.
Membrane rod must move back against direction of arrow to its original position.

Diesel Engine - Poor Throttle Response|Page 4070 > < Diesel Engine - Poor Throttle Response|Page 4068