2000 buick lesabre test read po102 mass air flow sensor or vaf low input on 2000 Buick LeSabre

i hear a sucking sound for 30 sec or more when its cold it stops then i can drive off. when i stop at a light the RPMs raise up like im about to take off. sometimes it ideal down.

by in Memphis, TN on August 27, 2012
3 answers 3 comments
ANSWER by on August 27, 2012
It sounds like a bad mass air flow sensor. You can unplug it and drive it. If the idle issue clears up then you will need to replace the mass air flow sensor.
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COMMENT by on August 27, 2012
it still rides the same
ANSWER by on August 27, 2012
REPAIR VACUUM LEAK,INCLU. INTAKE TUBE. DID HAVE A LOT OF MAF TROUBLE WITH THIS CAR.
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ANSWER by on August 29, 2012
Just for curiosity sake...does the 'sucking sound ' happen when your're holding the brakes?
COMMENT by on August 29, 2012
no. it just does it in the morning when i first crank up and when it sit for a while, and i crank up again only for the first 30 sec
COMMENT by on August 30, 2012
CHECK INTAKE TUBE CLOSELY FOR SPLIT OR HOLE, MAY NEED TO REMOVE FOR INSPECTION. IF YOU REMOVED THIS TUBE AND STARTED THE CAR, IT WOULD SOUND JUST LIKE YOU DESCRIBED. THAT'S THE REASON I SAY CHECK IT BEND IT LOOK ALL OVER IT. WHEN FIRST STARTED THE IAC IS OPENED UP MORE AS ENGINE RUNS A FEW SECONDS IAC CLOSES AND "SUCKING" SOUND SUBSIDES. ALSO CHECK FOR LOOSE AIR FILTER COVER.