Soi gotta 94 4dr civic w/d16z6 and it just started doing it last night. its only when i get on it, does a cloud of like black smoke come out the exhaust. it doesn't do it when just crusing or going thru town.

Im thinking its in need of head gasket and o ring seals and stuff changed?

Does anybody have another idea?

Im thinking of buying a full gasket set w/o rings and all that jazz and adjust my valves, hopefully that will solve the problem.

but yeah ideas are welcome.

 

check the cat

 

black smoke = rich fuel mixture
blue smoke = burning oil
white smoke = burning coolant -(head gasket )

 

Id swap out the o2 sensor and run some seafoam thru it. Do seafoam first as its cheapest.