Whistling noise

Well i have a 3.4 2000 impala and the cars been great to me other than the fact i had to put a new transmission in at 36000 miles. But anyway whenever i am driving (at any speed)and i floor the pedal or 3/4 of the way down i start to hear a whistle coming from the car. Now i only hear this when i have the windows down and only when i accelerate, but a few of my friends have to me its pretty loud. Now i know a fair amount about cars but im stumped on this one and i would like to know if u guys have had any problems like this or what u guys think this might be coming from. Thanks

no1 can help me out?

how about a possible vaccum leak, where does it sound like it's coming from?

mike

how about a possible vaccum leak, where does it sound like it's coming from?

mike
Well to tell u the truth i really cant tell since i have to be driving to hear the noise and since i cant get outta the car im assuming its commin from the engine bay and i cant really tell what side its comming from.

Can you hear it when you are sitting still revving on the motor?

mike

nope

only when its in gear and im on the gas pedal 3/4 of the way down

I hate bringing up old post's, but I have the same problem. I took my impala to autozone because of the check engine light and they said "replace the EGR valve", so I did. Needless to say it didn't fix it, but it does seem to run better. To me the location of the sound is coming from the back side of the engine. I am also stumped and would appreciate any input to fix this problem. In addition...since I have had this problem the car is (for the most part) gutless. Thanks again!

It sounds like the intake manifold gasket is starting to go, which is a VERY common issue on the 3400. This will cause a vacuum leak at WOT which in turn can make a whistling noise. This vacuum leak will also trip an EGR valve code, as the PCM uses the MAP sensor vacuum signal to determine EGR flow. You should also check the throttle body mounting gasket (another possible cause of a vacuum leak and whistle), and look for coolant in the oil (another sign of a failed intake gasket).

I hate bringing up old post's, but I have the same problem.


Sorry but it is against our community rules to resurrect threads this old. In this case over two years old.

Please feel free to start a new thread on your problem because I will have to close this one.

Thank you for your cooperation.