hey guys im new and got some questions, i just bought a 92 dakota 2wd with a 318 in it it has 170,000 miles on it and black smoke comes from the exhuast what could cause this besides the o2 sensors i already replaced the plugs, cap, rotor and wires what else should i do? thanks

 

a new motor. : )

 

Black smoke meens its running rich. You could check your fuel system maybe a fuel injector isnot working correctly or bad fuel pressur regulator. or dirty fuel.

 

just happened to notice the title but, maybe its a diesel and you dont know about it , haha just kidding, yeah i wouldnt put it past me your running extremely rich, notice your fuel gauge drop faster then normal?

 

heh or ur burnin oil like i was took off my heads all my pistons were black with burnt oil[sm=yikesomg.gif]

 

yea not sure what it could be hopefully just running rich because of a sensor or something thats what im hoping i dont know if its burning gas more than usual i dont drive it i tore it all apart and starting to fix it up custom interior, paint and an air suspension. if i do a compression test that will tell me if its burning oil real bad right. or is there another way it smells like gas though from the exhuast which led me to believe its running rich???

 

have your used oil analyzed for blow-by. not sure where you can take it to have that done but that will tell you if you have internal problems or not.

 

wow nvr heard of that not sure about any one that does it either

 

A compression test will not tell you the condition of your rings for that you have to do a wet compression test.