Help! Very rough idle and whining sound

[BiTurbo]

Newjack Thanks for the input! If it was misfire, shouldn’t I get a code? Ill check the lower intake boot and clean the idle control valve ASAP! Thanks!

echo46 I was thinking exactly the same about the cam position sensor… A buddy had an issue with that part and the symptoms were pretty close the same!

Johnmadd About the alternator voltage regulator, the other day, when I started the car, the whining sound was pretty bad and I noticed that when the indoor light were on, they were fluctuating big time with the whining sound!

Clearly there was a link with the whining sound and the alternator somewhat!


So alexandre is gonna come check the car next WE. Never thought I’d say that but I hope the symptoms will still be present!

Thanks again all!!

[echo46]

Let us know what happens, I curious.

[aurelius]

Worth a look?

Click HERE for an E46f thread that gets straight to the point re the lower oil drain hose connecting the CCV to the dipstick tube. Bottom line is it fails regularly, causes a rough idle (especially in cold weather), may save you from full CCV rehab, and is cheap/easy. Note: in addition to the part number mentioned in the DIY, there's another, insulated version of that hose. Same price as non-insulated.

Amazing how many respondents to that thread have found this hose to have disintegrated.

[BiTurbo]

Thanks for that! Ill take a look!

Worth a look?

Sure!

Let us know what happens, I curious.

The past few days have been more clement (-10) and its starting ok now. No whining sound anymore...

[aurelius]

Did you ever solve this issue? If so, do tell.