speed lover

Sorry this is so long. I reasently had strance low rpm revs when im stop and in park followed by a knock from my engine. the knock carrys up till around 10 mph then stops, another thing i noticed is it only does it when its hot out. i have also found that it does not do this when the a/c is off. norrmally this would not be and issue for me because i could roll down the window and be fine, but i live in arizona. please help i need to get this fixed and would love to have it figured out better before taking it to the dealership. thanks and again sorry for the essay.

Automatic 51

iTrader: (2)

Simplest thing might be a dirty mass air flow sensor.

Do you have an aftermarket filter or intake on the car? And check engine lights?

speed lover

I have an after market intake no check engine lights but this has been happening before the intake.

Green_Bandit

iTrader: (25)

How's the freon pressure?

Automatic 51

iTrader: (2)

Is it happening while you're sitting still? No noisewhile idling but when you turn the ac on it sounds like a constant noise?

eusgen

iTrader: (5)

My car used to do that knocking sound too!! I just let it ride out and then one day it was gone lol!

speed lover

ok so its the freon sorry for the long wait on the reply, i plan on fixing the issue today