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[Bobi T]

Well I did the compression test and it was 230 psi across all cylinders. So my theory goes down in the trash. Piston rings and valves are OK. No idea why the oil smells like gasoline.

[Bobi T]

So removed the pcv valve and checked. It’s super clean and looks like it’s working. This is confirmed by reinstalling it and squeezing the hose which made the engine stall. So it is sucking air from crank case.

However I realized when I open my oil cap while engine is running there is quite a lot of pressure and it blows out gasoline vapor.pretty much constant. This made me belive that my rings are worn and the pcv system is just not enough to equalize the pressure so it’s pretty much stays open all the time. Does it make sense?

But the real question is should I do anything about this? My engine oil level does not increase se(last oil change February) so its only vapor leaking.

[Bobi T]

Dave and Jeffrey, thanks for all the information it has been really helpful.

I catched up with the service schedule except the spark plugs and fuel filter in the tank(no seperate filter).

I’ll try to compression test I understand the concept. However when you say PCV is it just the PCV valve I have to check/replace or are there more types of common failures with PCV system?

[Bobi T]

Thanks for the video!

So according to what I learned from the video:

* My O2 sensor looks fine reporting between 0.7 to 0.1 and always fluctuating
* My short term trim levels though jump up and down quite a bit though. While driving in the city usually jumps to positive +20 or so then spend a lot of time in the
negative -5 and negative -10 area. It usually is in the low side around -3 while cruising or idling.
* Long term trim levels usually either -4 or close to zero never seeing a plus.
* My air fuel ratio looks quite healthy always around 14.7 except gear shifts.

As I understand this means that it might be running a slight rich condition which does not explain the clean and shiny spark plugs with white deposits.
In the end according to the video I have to check a lot of things like exhaust, vacuum leaks, sensor health etc.
So I guess there is no direct answer here. However you might answer two easier questions.

q1. The valve clearences has never been adjusted in this car. Can it be the cause?
q2. Although I thought spark plugs were ok I am not a mechanic so maybe they are not so ok. Can this be the cause?

• This reply was modified 3 years, 9 months ago by Bobi T.

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