Intermittent vacum leak?
Hello all, im new to the forum but not new to whats going on under the hood. I drive a 99 Bonneville SE with the good ol' 3.8. the problem started this past summer when i accelerated rather hard and the car clunked, sputtered, almost stalled and really wrecked my day. the car began stalling when slowing down, and idling erratically. I stopped down to my local autozone - my preferred parts dealer and had them toss a scan tool on it. The scan came back MAF sensor. I remember reading about the computer using the MAP sensor for air intake calculations when the MAF sensor was not properly functioning or absent, so i disconnected the MAF sensor and after a hard start the problem was gone but i had a check engine light and reduced economy, a big issue with my change pile, er bank account. I replaced the bastard $150 sensor and the problem disappeared for about a week. the following week the car was stalling again so i again disconnected the sensor but noticed a very loud air rushing sound while under the hood coming from the airbox... not an essential part of the car properly running correct? i pressed on the airbox and wiggled it around and the noise went away... car ran fine for several days. then the noise came back, the car again had a very erratic idle but a couple secs on the throttle and its gone. the car will no longer run with the mass airflow sensor connected and i can hear this massive vacuum leak all the time and the car stalls at every stop or slow down unless i two-foot it. at a complete stop in park the idle will bounce from 500-1000 RPM for a few minutes then rev to 2000 or so RPM and return to a normal idle.... when the car is in low erratic idle mode the charge gauge reads right on the edge of the low red, 8 i believe? i cant remember off the top of my head. lights and fan dim drastically. Fuel millage is terrible, acceleration is pretty much the same, no oil or coolant consumption.
I have no idea what this could be. Any help at all would be awesome. Im totally stumped and its my primary driver, to my sub-par job, so i cant afford to take it to a shop.