Very strange engine noises when idling
05-25-2019, 08:25 PM
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Very strange engine noises when idling
So my exhuast manifold gasket was leaking. I replaced with a new gasket and an 034motorsports high flow manifold. Now, at idle (especially on cold starts) it almost sounds like something is grinding near the front of the motor. I've upgraded PCV valve, PRV valve, no boost leaks, holds boost fine and runs great, just sounds terrible. The noise goes away around 3500 rpm. Could it be a vacuum leak? i am so lost.
06-04-2019, 03:57 AM
#2
So my exhuast manifold gasket was leaking. I replaced with a new gasket and an 034motorsports high flow manifold. Now, at idle (especially on cold starts) it almost sounds like something is grinding near the front of the motor. I've upgraded PCV valve, PRV valve, no boost leaks, holds boost fine and runs great, just sounds terrible. The noise goes away around 3500 rpm. Could it be a vacuum leak? i am so lost.
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