4.6 fuel to lean/to rich? Advice!

[soonerfever]

I keep getting a trouble code telling me that my fuel is either running to lean or to rich. I have a aftermarket h-pipe with no cats. Could this be causing the problem? When the car is at a smooth constant speed you can feel a little miss. I appreciate any help.

 

[nwapache]

so, what happened to your o2 sensors?

 

[macdstr8up]

Im not the best on tech stuff, but check ur plugs, see what they tell you then id go from there.

 

[GDawg]

O2 sensors or vacuum leak.

 

[fastangboi]

5&8 foul out quickly. cheak driverside front and back plug.

 

[Mike97gt]

can you get us the exact code numbers? We might be able to offer better advice then..

 

[soonerfever]

Hey guys, it was one of my O2 sensor. It had gone out. Thanks for the help.

 

[my95gtstang]

i had same problem but im misfiring on 3rd cylinder and yeah its studders and stuff around 45 it starts. blows out white smoke like as if i did sea foam but i never have haha. head gaskets i think are my problem.