fuel and oil on compressor side of turbo!!!

[RobertP]

today a truck came into the shop with a no start problem. well after determining that the lift pump is good and that i have good rail pressure. i pulled the valve cover checked the voltage at the injector all good there. oil level is not over full. lots of white smoke when cranking. well the last thing i did before leaving work i pulled the air intake off to find oil and fuel on the compressor side of turbo and in the intake tube. i was thinking i had a stuck injector until i found that now i think we have a stuck injector and a bad turbo. anyone else have any ideas on what this could be.

 

[RobertP]

im sorry i forgot to add that it is a early 2005 325/610 auto. it is a fleet used truck, towing a small trailer. its a 2500 still has the plastic intercooler all stock 54000 miles.

 

[rbattelle]

My first thought is a blown seal on the turbo permitting oil to leak onto the compressor side. Is the compressor wheel covered in oil? What about the engine-side of the intercooler? Could the intercooler be plugged with oil sludge?



Of course, that doesn't explain the presence of the fuel. It's hard to imagine how fuel could get in front of the turbo, as there are no fuel lines anywhere near it. That means it must be coming from the intake. That would certainly suggest a fuel injector that's leaking fuel while the intake valve is open.



Combustible material on the inlet side of the compressor is pretty dangerous (as I'm sure you're aware).



Ryan

 

[Bob4x4]

today a truck came into the shop with a no start problem. well after determining that the lift pump is good and that i have good rail pressure. i pulled the valve cover checked the voltage at the injector all good there. oil level is not over full. lots of white smoke when cranking. well the last thing i did before leaving work i pulled the air intake off to find oil and fuel on the compressor side of turbo and in the intake tube. i was thinking i had a stuck injector until i found that now i think we have a stuck injector and a bad turbo. anyone else have any ideas on what this could be.

Can you explain how you checked voltage at the injectors?



Bob

 

[RobertP]

there is a procedure on tech connect telling which connectors to test in the injector connector. to make sure you have the currect current to the injectors.

 

[Scrappy]

guessing here but I bet bad injector that overfilled crankcase. The oil got diluted and ate the bearings in the turbo and that took out the seal letting the concoction into the compressor. Does the turbo spin freely and does it have any play? That is the only way I can think of to get fuel into the turbo.

 

[RobertP]

the turbo spins freely still and still have no play in and out just normal very little up ans down. well after following stars advice we disconnected the fuel rail and capped it to see if the smoke would stop well sure enough the damn thing fired up and started to run away. a tech put a phone book in front and it stalled. so now star does not want to release all six injectors to us we have to find out which one is leaking even after we told them that it will be back for more. im just trying to get this thing fixed once and have it fixed right the first time. :-{}



after talking to star it has ****** me off to know that chrysler is crying because our ffv is down. (fixed first visit)

 

[rbattelle]

Did it run away because of all the fuel and oil in the intake? Or because an injector is stuck? Scrappy's explanation sounds pretty good to me.



It would've been nice if Bosch had incorporated some electronics that could detect a stuck injector.



Ryan

 

[bmoeller]

It would've been nice if Bosch had incorporated some electronics that could detect a stuck injector.

A scope would most likely only show whether the solenoid was stuck, not necessarrialy show that the injector its self was stuck.

 

[bmoeller]

It would've been nice if Bosch had incorporated some electronics that could detect a stuck injector.

A scope would most likely only show whether the solenoid was stuck, not necessarrialy show that the injector its self was stuck. Would probably put them on a test stand to figure out which one it is.



A cracked head could possibly put fuel in the intake. That is the only thing I can think of, if the oil isn't diluted, and not leaking on the outside of the engine. Although, the CAC would have to be full of fuel as well for it to make it back to the turbo.

 

[rbattelle]

I was thinking something more along the lines of a variable capacitance device that could detect the position of the needle.



Ryan