96 accord lx burning oil and smoking..

Hi, ive looked all through the fourm and could not find a answer. I have a 96 accord lx 5spd with 190,000kms. My engine light is on, i took it to get diagnosed and they said it has a "lazy oxygen sensor". Now the car is burning oil,and also after sitting over night, when i start it the next day there is alot of smoke from the exhaust untill the engine warms up for about 2-3min. Does this have to do with the 02 sensor or a whole other problem? thanks guys

It more than likely has to do with a whole other problem. I suspect that its bad rings causing it to smoke and burn oil and at such high mileage your options are limited.

What color is the smoke, blue, white or black? The only way an o2 sensor would cause smoke is if it is giving inappropriate signals to the ECU, causing the car to run rich. If excessively rich, there would be unburnt fuel that got through and burnt in the exhaust, causing black smoke to come out the tailpipes.

Blue smoke is oil, and judging by your mileage, it is probably from worn valve seals or piston rings.

In the morning, if it is cold, a car will cause more steam because of the condensation in the exhaust. This can appear to be white smoke, but if it is greatly reduced when the car reaches warmer operating temperatures, then it is probably just condensation.

The smoke is white. Also, it is 190,000 kilometers, not miles i think in miles it's around 118,060.

My guess is you have a bad valve guide or valve seal that is leaking oil into the combustion chamber when the car sits. When you start it, it has to burn the oil out of that cylinder, causing the smoke. It's not that uncommon, but you don't see it in Hondas a whole lot. Chances are, this was happening for some time before it got bad enough for you to really notice the smoke and oil loss. Anything buring in the combustion chamber that shouldn't be there will slowly foul the O2 sensor's ability to work correctly, which is the code you are seeing. The O2 sensor is not active until the sensor has warmed up signifigantly, usually several minutes, so while the problems are related, they are two different problems. Using one grade heavier oil will help slightly, but don't do it if you are in a real cold area. You are probably going to have to have what they call a cylinder compression leakdown test performed to verify the problem. Usually a broken ring will smoke when the throttle is dropped, having to have the suction of a closed throttle plate to draw oil up through the bad ring seal, and it gets worse as the motor warms up. I don't know if valve seals can be replaced on yours with the head on the motor, some you can. I think this is what you are looking at, though. Just to be sure, though, inspect your PCV and filter to make sure it isn't drawing oil off the crankcase vent system into the intake.

OK, just read your reply, I missed it before. The white smoke could be coolant burning, but since you said you are having an oil control problem I would lean towards the valve seal anyway. Oil doesn't smoke as blue as it used to (having better purity now) and sometimes the difference between oil and coolant smoke is very hard to discern. But the smell of burning coolant is unmistakeable, smells like maple syrup tastes, if that makes sense. Oil smoke has the distinct smell we are all familiar with. If you have any doubt, let the motor sit overnight, pull the coil wire off and crank the motor for several seconds. Then pull your plugs out. I'm betting you will find one wet with oil.

Is the valve seal replacement a big job? Or something i could do myself?

Is the valve seal replacement a big job? Or something i could do myself?

Requires specialized tools and compressed air, assuming they could even be done with the head installed. Valve springs gotta come off.