Originally Posted by Felber
Is there any way to know for sure if its a leaky injector. i removed the fuel rail with the injectors attached and none of the injectors leaked.
Did you have pressure to the injectors while they were out? Don't quote me on the pressure but most fuel injected engines run 30-45 PSI of fuel pressure. It could behave differently with fuel pressure applied than with none.
The only way on a fuel injected engine fuel could get into the oil is through the injectors. There are no internal passages for fuel. its not like a carburated engine where you can adjust things like the float level, a float sticking, needle and seat, ect.....
Do you have a fuel pressure gauge? You could see what the fuel pressure is while the engine was running. There is a pressure regulator some where in the system that controls pressure and if it was malfunctioning allowing to much pressure, each time the injectors opened it would allow more fuel to enter. One would think that would be caught by the oxygen sensors as it would read high and try and back off the amount of time the injectors are left open to compensate for it.
I had a 98 Dodge 2500 with a 5.9 gas that was filling the crankcase up with fuel. It also had very poor fuel mileage and the exhaust smelled rich. I bought injectors off the internet for a hundred bucks or so and put them in and it made a whole new pickup again. Fuel mileage went up and no more fuel in the oil.