VARIABLE INTAKE MANIFOLD, CHECKING

VARIABLE INTAKE MANIFOLD, CHECKING Audi TT 8J facelift

Only perform the test if there is a loss of torque. That means there is a reduction in engine acceleration.

Special tools and workshop equipment required

Test Conditions

The Intake Manifold Runner Control (IMRC) valve -N316- was checked with a vehicle diagnosis tester.

If the IMRC valve is OK, perform the following tests

Remove the engine cover.

Start engine and let run at idle.

Have a second person increase the engine speed abruptly (press accelerator pedal). Observe the variable intake manifold vacuum actuator.

If the change-over does not function as specified

Check the vacuum system for leaks.

Check whether the change-over mechanism moves easily. Do this by actuating the linkage by hand.

Check whether the vacuum lines are correctly connected.

Check that vacuum hoses are not porous.

Remove the adjusting element vacuum hose -1- for the IMRC valve from the control valve actuator -2-.

Set the slide ring -1- on the VAS 6213 to the -A- position for "vacuum."

Connect the VAS 6213 to the IMRC valve actuator.

Operate the VAS 6213 several times.

The vacuum actuator must move -arrows-.

Replace the vacuum actuator if it does not move.

VARIABLE INTAKE MANIFOLD, CHECKING Audi TT 8J facelift