Fuel dripping from exhaust manifold connection on N14-M

I would remove the exhaust manifold, you do not need to remove the turbo or the oil line, run it and see is the air from the cylinder coming out is cold. remove the valve cover and see if the set is tight, and measure the cam lift. The next thing is to remove the injector and use a dummy to check the cylinder leak down, do it at the top and bottom. Look at the injector when you have it out looking for a blown tip. Have you been putting in fuel additives that have water emulsifying properties? If the kit is bad there will probably be aluminum in the oil filter paper.
Just a thought!

 

I'd check the timing. Sounds like it's retarded.

 

Also, if it's missing or something to make you think there's a dead hole, you can just use a heat gun on the exhaust ports to find a cold hole.

 

Need to know if its a celect or mechanical n14. n14-m, im thinking mechanical. If its not a Celect engine it has Pt fuel pump & step time injectors. Step time injectors use engine oil pressure to advance at idle & light engine loads to reduce smoke. any leaks in the oil system to the injectors will prevent the injectors from advancing from the base time & it will smoke heavily at idle but it will run fine under load. Does it run ok on the road?

 

That is something I never thought of, we had a lot of N14's not one STC, Even if it is an STC removing the exhaust and preasuerising the STC is the only way you can be sure it is fixed, even new injectors, can be junk. On an STC, remove the jake heads and solvent wash, and blow it as clean and dry as posible It will not hurt anything. Then presurise the STC and repair every leak. Fill the hose with ATF wash it clean again and do it all again, you have to keep doing it untill the leaks are fixed. Then test the STC valve, it should shift at 45 lbs going up and shift again at 40 going down. Then run it to be sure everything works. If it has a problem then you do it all again, be sure you fill the STC with oil or it will take forever to stop smoking filling the system it will stop very quick.
Just a thought!

 

The viscosity sensor is in the signal line to the oil pressure regulator & shouldn't be a player unless the engine has low oil pressure. You should see around 60- 80psi cold idle & it will drop as the engine warms up. There should be a 1/8 pipe plug on the stc manifold on the rocker box to measure the oil pressure in the system. A quick way around the stc valve as a test you could connect the inlet & outlet lines together & bypass the valve. don't road test it like that, just see if the smoke clears. If it only smokes when the oil is hot make sure the idle speed is around 700-750rpms. too low an idle can cause low pressure to the rail.

 

You only need 35 to 40 lbs to check for leaks, I did lots of the 444's, never saw an STC N14.
Just a thought!