lncr 402 running way rich, no fault codes

[lancer402]

Hey all

Lancer 402 is running way rich, plugs are black, black smoke out the back, and running rough. I have no fault codes at all and I think I should have 54 or whatever one pertains to locked rich.
I unplug the O2 sensor and still have no fault codes. I checked the fuel pressure and it is OK, 50 psi.
Any ideas??
Thanks
Andy

[lametec]

Does it do it from initial (cold) startup? If yes, look into the MAP sensor and hoses.

If no, look into the O2 sensor.

[lancer402]

OK, makes sense. It doesn't appear to do it on a cold start up. I assume this is when the system is not in closed loop yet. But when it goes into closed loop it starts. I also tryed it with the O2 sensor unplugged and it is the same with no fault codes.
I am having trouble getting the darn O2 sensor out. I am out of town on business this week and letting it soak with penatrating oil, but it appears the head is coming off this weekend.

Thanks for the advice.
Andy

[shlbyturbo]

check your coolant temp sensor too.