I HAVE A 1992 HONDA CIVIC FERIO NON VTEC TWIN CARBURETION,
-ITS MIXING FUEL AND OIL,
-WHEN YOU START IT IN THE MORNING, IT PRODUCES ALOT OF BLACK SMOKE AND MISFIRING, AFTER A WHILE IT PICKS UP AGAIN.
-I HAVE TO CHANGE THE PLUGS EVERY MONTH, BECAUSE SOMETIMES IT FILES TO START BECAUSE OF MISFIRING.

WHAT COULD BE THE SOLUTION TO THE ABOVE PROBLEMS

 

When was the last time you had the carburetors apart? I would think black smoke would be extra fuel, and not oil. Could the float be sticking, or could there be some debris from keeping the float needle from fully seating?

If it really is oil, it is likely coming past the valve stem seals and valve stem guides, or it is coming up past the rings. Check the compression and leakdown of each cylinder to verify the condition of the rings. If it's the valve seals that are leaking, take the head off, take it to a cylinder head shop, have them pressure test it, and at least replace the valve stem seals and clean it up. If it needs it, you can have a full valve job done. If it's the rings, you'll need to rebuild the bottom end.

 

ok thanks alot.
since i imported the vehicle from Japan (4 years ago), i have never put the carburetor apart.
And it consumes a lot of fuel, so it could be the same issue
You're right, because there one mechanic who advised me exactly what you've said, so i just wanted to be sure.
but is it possible to replace the whole
1.twin carburetor.
2.or just to replace the needle.(parts in the carburetor that i should replace to stop this problem.
and where can i get these two things, in my country there is nothing, where can i import them from, please advise if you know any dealers from your end.

 

You likely won't need to replace the whole carburetor (either one of them). Take off the airbox and see if you can find a name and/or model on the carbs - I'm not sure what kind of carbs were used on these engines. I'd be willing to bet there are rebuild kits for these carbs under $40 each. The rebuild kits should include seals, o-rings, and may include new needle valves or float parts. A lot of the time if you just take the carb all the way apart, clean everything up really well, then put it back together, it will run better. Tiny amounts of trash can get in the jets and on the needle valve seat and cause it to run bad. What country are you in?

 

The carbs seem like they're out of adjustment.

Would be advisable to take the carbs off, take them apart, clean, and replace gaskets, then sync them, do a valve adjustment on the engine, then tune the carbs.

The only issues I foresee would be carb rebuild kit availability and it seems (no offense) like your knowledge of engines is not much, so you may not be up to task to do this yourself.