Checking the tightness of vacuum receiver in the intake manifold

Test conditions

Check and make sure all vacuum hoses on the intake manifold are not damaged and are properly connected.

Checking procedure

Disconnect the vacuum hose going from the damper valve intake manifold to the intake manifold, intake manifold (Fig. 2.69).

Connect a hand vacuum pump to the intake manifold.

Tighten the knurled screw on the vacuum pump.

Operate hand vacuum pump until the pressure gauge reaches a vacuum of 0.3 bar.

Ensure a pressure of about 3-5 minutes.

If the vacuum remains at 0.3 bar - vacuum reservoir in the intake manifold is undamaged.

If the pressure increases - replace the intake manifold.