Re: Engine Knocking noise?
Yes. I have a definite knocking noise at idle on my I4. It is faint, but audible, only at idle with radio off and it is not valve noise or injector clack. It is NOT correlated with engine speed, that is, if I slightly rev the engine in neutral the knock does NOT increase in frequency. It does not always occur at every idle. I suspect an emissions-related solenoid, somewhere. If winter ever goes away here in WNY I will find it.