OUR WSA SMOKING FROM EXHAUST. WE CHANGED A CLOGGED PCV VALVE AND HOSE AND ITS STILL SMOKING. COULD IT BE OLD OIL THAT NEEDS TO BE BURNED OR CLEANED OUT?
1991 Honda Civic • 21,000 miles
It seemed like it was running rich before we realized clogged pcv and hose. Strong gas smell from exhaust and light color smoke. Runs fine, no overheating. Changed clogged pcv and hose and now doesnt smell of stong gas from exhaust, just more like faint burnt oil smell and light color smoke, especially when revved or driven, not so much at idle.
It still could be your piston rings, valve guides etc. These are some of the most likely causes of an engine smoking. You also should check the air cleaner to see if it is oily. If so then you might have a valve problem.
We noticed when we changed the pcv valve and hose that oil had been going back in the intake because it was so clogged, so could it be that the oil needs to be cleaned out of the system?
I would start by doing a compression test. This will tell you if your engine is wearing out.
Okay thank you. Also wanted to add that the car had been sitting for 2 years, so not sure if that would make a difference in what you think may be the problem or not, as far as maybe old gas/oil running through the car? Thanks again
It's possible. I would drive it for a while before I made any decisions on what to do. It might clean up some.
Try a 10.00 bottle of seafoam to clean out the intake system and valves/combustion chamber. You can find it at Wal-Mart, go to Utube and type in Seafoam. It very effective and will increase your MPG. If it didn't smoke b4 and your dilligent on oil changes your engine should b fine. if not oil rings if you drive and then let off gas, or valve seals but like I mentioned b4 if it wasn't smoking b4 it's prob. just oil and varnish that needs cleaned out. SeaFoam it.
Jun 5, 2012.
Jun 5, 2012.
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