Hey guys. I need some help please. I just bought a used Toyota Avalon with 135,500 miles on it. They sold it because it was smoking and didn’t know what was wrong with it(they were an old retired couple). They were the only owners and it has never been driven hard or abused… Anyway. I read online that unhooking the vacuum hose from the pcv valve may make it stop smoking. I unhooked it and plugged the vacuum hose and they were right. It stopped smoking after I got the rest of the oil out of the hose. I thought maybe the old pcv valve was messed up so I got a new one and hooked it back up but then smoking was back. So I am getting too much blow by in it for sure. I don’t think the valve seals are leaking because as soon as I unhooked the vacuum from the pcv valve the smoking stopped. I drove it for 2 days with no smoke whatsoever. What could be causing the blow by to be so strong? It was strong enough to spit oil out of the pcv valve without the vacuum hose sucking it out(there was oil on the engine).
The check engine light is also on so I hooked it up to a computer at an auto parts store and it said I had a misfire on 2 cylinders(2 and 6). So I changed all the spark plugs and re-hooked it to the machine. This time I only got an error code for cylinder 2. Each plug has a coil so I switched the coil from cylinder 4 to cylinder 2 to test if maybe the coil was bad, but it still gave me a misfire on cylinder 2 only. I even swapped the plug from 2 to 4 to make sure the new plug wasn’t bad. Still a misfire on cylinder 2.
Any help would be much appreciated. It is still smoking(ONLY WHEN VACUUM HOSE IS ON PCV VALVE) and check engine light is still on and error code says cylinder 2 misfire. Thanks in advance for any answers!