It is not easy for me to diagnose what the noise is without knowing where it is coming from and the possible cause.
Does it sould like intermittent hissing noise? Maybe like a steam engine train?
Since you have irregular idling, I would suggest checking if the spark plugs are tightened securely.
It could be a leaking valve. It could be improper adjusted belting noise, or compressor clutch engaging/disengaging. The list could go on and on.
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Tuesday, June 30th, 2020 AT 1:16 PM
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