2000 Chevy malibu engine hissing problem!?

[unknown]

I took my car to advanced for a engine check light dialysis. It showed a failure, that I can't remember what it was, but the tech guy said it was a vacuum leak. I noticed that the hissing sounds like it was around the engine, (more towards the driver's side) but not sure if it is a vacuum leak or not. Could it be a bad intake gasket? I don't lose oil or coolant.

 

[pinkypin123]

Do you know the specific code? First visually inspect your vacuum lines, they can degrade or come loose with time and wear. If you can't spot the problem get a can of carb cleaner/starter fluid and spray a bit around your vacuum lines one at a time. If your idle changes you know it's getting sucked in in that area.

 

[Garrett]

How are your brakes? if they feel abnormal, it could be your brake booster vacuum line. Usually a dead give away.