This is one bank of a Porsche 911 (991 engine) under 30,000 miles. Look at the difference in the witness marks on top of the pistons – shows what the difference in spray patterns can do. How long before number two holes the piston, maybe another 30 – 50,000 miles but there was definite detonation on the centre of the piston.

Look also at the carbon on top of number one piston and scoring of the bores and where the spray being at the wrong angle has washed the piston edge causing the scoring. This is all down to poor injector fuel distribution and atomization; a problem that cannot be seen or corrected while the injectors are on the engine. Anyone want to challenge us on that one???

Cyliner number 3 is good.

Now all the diesel guys who all of a sudden are “specialists” in gasoline GDI (oh you must have a test plan, you must test at high pressure), look and learn because you know NOTHING about Gasoline GDI but if you want to learn, buy yourself an ASNU; join the network and we will teach you.

If you are listening to companies who have recently been telling people not to buy our system but to buy their one injector at a time tester, please ask them, WHAT DO THEY KNOW ABOUT GDI? In fact what do they know about gasoline injectors?

ASNU are world leaders in testing and servicing ALL GASOLINE injectors, including GDI.

For the best service, only take your injectors to an authorised ASNU Service Centre.