[ehsan]

I first discovered when i accelerate there was a jerly movement at around 4k rpm.. i read the thread on Crankshaft positioning sensor but the dealer said its still ok. They did a compression test and found out cyilnder 1 and 2 have low pressure. Anybody here has the same problem?

 

[Geo K]

...They did a compression test and found out cyilnder 1 and 2 have low pressure. Anybody here has the same problem?...

Don't recall seeing this issue here before.
What is your mileage now?
Have you been changing the oil on a regular basis?

 

[ehsan]

Don't recall seeing this issue here before.
What is your mileage now?
Have you been changing the oil on a regular basis?

yes, I did all my maintenance at the dealer. Never missed any. Its 133k km.

 

[Knightrodrob]

yes, I did all my maintenance at the dealer. Never missed any. Its 133k km.

What kind of driving does the car go thru?

 

[ehsan]

What kind of driving does the car go thru?

never driven on track. just school runs and work commute.

 

[ans]

if its not smoking its more than likely carbon deposits on valves, as rings would give off smoke , could try getting some fuel additive or endoscope in inlet manifold to have look at valves