What i found is that the high pressure pump return line that goes on the back of the rail has a flow of diesel as if its just pumping diesel to the return ..i must still check injector back leak ..what made me worry is that with the back leak test it says to blank off the small pipe otherwise it will suck in air
I have to blank it off otherwise i get diesel sprayed ..thats when I unclipped the h/p pump return and saw its the one pumping the diesel out

Sent from my GT-I9500 using Tapatalk

Were the new injectors "new" or reconditioned?

If reconditioned, they could be faulty, a leakback test will give you an idea.

Also injector classification may create some issues, as well as a bad fuel pressure regulator.

Jason

As stated new otherwise would say reconditioned ..the injectors are programmed to their specific cylinders
One thing troubles me is that theres so much pressure from the hp pump return doesnt make sense
Anybody got a diagram for the fuel line routing I was told by MB agent that the pipes are in the wrong way ive searched for a schematic layout of the pipes just to correct myself but nothing shows up

Sent from my GT-I9500 using Tapatalk

Can't help with a schematic, sorry.

The return line from the back of the fuel rail is the output from the regulating valve. The valve opens just enough that the rail pressure is at the set point and the excess fuel (output by the HP pump) returns to the LP side.

The injector leak (from the tops of the injectors) goes to the fuel return valve on top of the filter. The other line on this valve goes back to the tank. When the fuel is cold, the fuel return valve puts the leakage back into the filter, unless it senses air. If it senses air OR when the fuel is warm, it returns to the tank. This system does not seem to give problems often, but that valve can fail.

If you are seeing lots of fuel in the line from the regulating valve, it *hints* that the pump might be good. Check the regulating valve. It is a fairly common point of failure.

I found these so farhttps://uploads.tapatalk-cdn.com/201...87e7e2a8db.jpghttps://uploads.tapatalk-cdn.com/201...d3ad410736.jpghttps://uploads.tapatalk-cdn.com/201...15dd68f9a4.jpg

Sent from my GT-I9500 using Tapatalk

I went ahead and tested these new injectors did the leak off test nr5 injector has very little leak off nr 4 2 and 1 has the same amount but 3 is the highest..im not feeling well with the result as these are new https://uploads.tapatalk-cdn.com/201...3a5b8d2d64.jpghttps://uploads.tapatalk-cdn.com/201...5d613183b8.jpghttps://uploads.tapatalk-cdn.com/201...501975b7e2.jpghttps://uploads.tapatalk-cdn.com/201...8fcddaa940.jpghttps://uploads.tapatalk-cdn.com/201...7c5ee417c2.jpg

Sent from my GT-I9500 using Tapatalk

How long did you run the test for?