Leaking Injector/s

[ozengines]

I think I have one or more leaking injectors. When I stop the car and then later start it up, it cranks and cranks then splutters into life. Black smoke comes out the exhaust which is obviously un-burnt fuel that has leaked into the piston or intake manifold. The injector rack is still under pressure after stopping. Would I have to take out each injector and if so how do you test them for a seal or would the damage be obvious? Are they hard to get out without damaging them?
After the car has be idle for a few days, it starts first crank. The car runs fine when running.

[westbad]

with the car at idle spray some wd-40 around the base of each injector, the leaking one will suck the wd-40 straight in.

[ozengines]

Wouldn't the problem be inside the engine on the nozzle tip??

[westbad]

this will tell you if your injector seal has gone... it will suck in air past the seal

[ozengines]

Oh, OK Westbad, will try that tomorrow.

[wamboin23]

best way is to connect a fuel pressure gauge into the system and see if it drops when you switch the car off.