V8 - ugly sound out of air intake

[StefanK]

Hey Folks,

first of all I apologize for any mistake in my writing, I am writing from Germany.

I've got a big problem.


Since the beginning of last year there has been a difficult to describe noise or sound from the air intake tract.
I could describe it as a hard slurp.
The best / loudest way to hear it is to stand in front of the car / air intake.

I also thought if there was a defective bearing, e.g. alternator.

But the noise remains, even if you remove the V-belt and so the alternator, water pump and servo pump do not turn.
The rubber hoses to the intake manifold seem also okay for me.


I suspect a leak in the intake tract.

Has anyone ever had such a problem?


I am grateful for every tip!

Best regards from Germany
StefanK

[O mage]

StefanK said:

Hey Folks,

first of all I apologize for any mistake in my writing, I am writing from Germany.

I've got a big problem.


Since the beginning of last year there has been a difficult to describe noise or sound from the air intake tract.
I could describe it as a hard slurp.
The best / loudest way to hear it is to stand in front of the car / air intake.

I also thought if there was a defective bearing, e.g. alternator.

But the noise remains, even if you remove the V-belt and so the alternator, water pump and servo pump do not turn.
The rubber hoses to the intake manifold seem also okay for me.


I suspect a leak in the intake tract.

Has anyone ever had such a problem?


I am grateful for every tip!

Best regards from Germany
StefanK

Yes iv'e had that problem of an air leak due to the valley/intake gasket and i could just about hear it. If you get a stethoscope open to atmosphere at the end and probe round you might be able to pin point it.

[Beverley Grove]

Check these clips are tight holding the intake pipe nozzle onto the air flow meter, and that the nozzle isn't loose.

[blitzracing]

The base idle can make a nasty noise if its wound up too far- clamp the air feed pipe to the stepper and see what the car idles at- it should be around 600 rpm. If its higher, then wind down the base idle screw until it slows.