Check For Air Leaks In The Intake System: Check
Connect the compressed air hose and adjust the regulator to obtain a pressure of maximum 0.3 bar .
A gentle hissing sound can be heard from the oil filler opening. This is due to the opening of an intake valve and the leakage of cylinder pressure past the piston rings.
If a leak is suspected spray a soap solution onto the area.
Small bubbles are permissible between throttle body (TB) and intake hose (if made of plastic). No bubbles are permissible with rubber hose.
Check for air leakage from canister purge (CP) valve. No leakage is permissible.