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Volvo v40 CC D3 (5 pots) 2014 - engine knocking with noise from oil cap

350 Views 7 Replies 2 Participants Last post by  ghan
Hello. I'm experiencing knocking noise with noise coming from oil cap. also I feel the car started to lose power abit. there also some stange noise while accelerating and goes away when leaving the throttle. I have uploaded a video

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I changed the oil with the filter 6 month ago! could it be the oil got dirty?
I have also whistling noise which is very audible once the car starts to move. i also noticed that the
ECM-Air mass/stroke is very high which is twice the desired value

ECM-Air mass desired 273.9 mg/stroke


ECM-Air mass/stroke 417 mg/stroke


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What happends when you give gas to 3K RPM and release?
What happends when you give gas to 3K RPM and release?
actually i can hear whistling noise then!
we have the same i try to find a fix
Do you have Vida with Dice? i have a feeling that it's vaccum issue! as ECM-Air mass/stroke is very high which is twice the desired value
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