Getting a strange gurgle sound in my stock air intake box and air tube..I've got a stock 04 GT 4.6 L with just a K&N air filter.40K on this very well taken care of machine.No unusual codes.idles fine,performs well no misses . The sound is intermittent and comes and goes while idling. Have cleaned the mass air sensor with the correct spray with no change.Tapped on the idle control valve with no affect.This is driving me crazy...car still runs great but i'am concerned that this may lead to something worse . Sensors are too expensive to start "parts changing arbitrarily ...any ideas will be appreciated .Thanks
Strange Noise From Air Intake
- Thread starter Bobby Burke
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Update...changed PVC valve OEM ev261..and new set of Motorcraft plugs sp493...no change...sound comes and goes at idle..no actual change in idle itself and the engine still performs flawlessly !??????????/ my granddaughter who heard the sound when she was standing next to the car said it sounds like a little motorboat Pop Pop .Now i notice what sounds like a miss from the exhaust on the passenger side . Any ideas ....once again no codes on the diagnostic machine ??!! HELP
Might be the Idle Air Control Valve. I had an intermittent honk like noise at idle with a rise in engine speed in my '04 GT. There are two difference styles of IAC, one with a hose connection to the air filter box and one without. The one without probably won't make the honking noise though.
If you don't have any change in idle speed the IAC is probably not the cause.
If you don't have any change in idle speed the IAC is probably not the cause.
trombonedemon
Well-Known Member
Try a tune. My car personality changed with tune. Is there excessive blowby in the Pvc tube? Try a higher octane of gas and fuel filter change. Now a popping noise is usually associated with a miss-fire. Assuming you are firing on all cylinders, fuel would be my next interest. P.s. if you are using the stock tune and 87 octane, depending on location that would cause your symptoms.
paintballpyro1
Active Member
I'm going with Iac as well. When I did my motor swap I replaced my 196k unit. After 2 weeks I was getting a kinda like howling, baaaahhh noise coming from the intake. Changed back to old iac and went away.
