Just did the test and the pressure relief valve seemed ok - not a single drop. However I decided to try injector leak backs as well and discovered some bubbles on one injector. Could this indicate a faulty injector?
The bubbly injector also has the most leak-back fuel (second cup from left on the following picture).
Background: the car has had occasional starting and hesitation problems lately. So far I have determined slow and not fully closing EGR valve. Physically blanking it temporarily lost the hesitation, but the starting wasn't still as it should. Battery is ok, battery cable and grounding terminals were cleaned, alternator is ok, fuel filter is quite fresh and genuine. I had the inlet manifold cleaned recently, which included removing the fuel pipes from injectors. This was last week and there shouldn't be any air left in system, should it?
Edit: no fuel leaks detected anywhere.
The bubbly injector also has the most leak-back fuel (second cup from left on the following picture).
Background: the car has had occasional starting and hesitation problems lately. So far I have determined slow and not fully closing EGR valve. Physically blanking it temporarily lost the hesitation, but the starting wasn't still as it should. Battery is ok, battery cable and grounding terminals were cleaned, alternator is ok, fuel filter is quite fresh and genuine. I had the inlet manifold cleaned recently, which included removing the fuel pipes from injectors. This was last week and there shouldn't be any air left in system, should it?
Edit: no fuel leaks detected anywhere.