How is the best way to do that?
Thanks

 

a scan tool with datalogging and the block off/ icp testing plugs

 

if theres air escaping around the top of the injector you should be able to feel it with your hand. Didnt you say you replaced the orings in the tops of the injectors?

 

Sorry don't have much time to work on it, have changed two of the o rings, have ordered enough to replace all of them and the o rings in the rail. Trying to find socket to remove the nipple to the injectors.
Yes I could feel air and hear it on the back two on drivers side and the front one on the other side.

 

Ive never seen the ones in the rail go out but, could be possible, have seen the ones in the top of the injectors messed up, alot of times thats a self inflicted problem when putting the oil rail back on.