Weird whistling/skreeching upon accelleration hesitation/stumbling/surging

[richn95136]

I was wondering if anyone can please help! I have a 1995 Lumina 3.1. When it is park and I press the gas the car seems to run OK. But when I put the car into gear and accelerate there is hesitation/stumbling/surging thoughout the entire driving range thereafter....At the same time there is this dreadful whistling noise which starts when after I put the car in gear and have driven a mile or two and the engine is heated up....The noise is REALLY loud. The whistling/skreeching starts as one high pitched sound, then another whistle in a different octave, then another in a different octave, etc. until there are 3 or 4 whistles simualtaneosly....the faster I try to go, the louder the whistles, the more hesitation/stumbling, the less engine power I have.....It almost sounds like some kind of obstruction in the fuel injection, a faulty EGR valve or an intake manifold leak. The funny thing is, after I have driven it to the point of whistling and put the car in park there is no hesitation or stumbling when I step on the accelerator, and I have to go to a very high RPM to get the noise to start when it is in park.....PLEASE HELP!

[Fritz The Cat]

Sounds like a vacume leak. Take a look at the vacume hoses, see if there is a plug with 3 or 4 hoses somewhere that is disconnected. I think on your engine it's right on top, near the throttle body.