Where is the intake boot located on the 1999 grand am, where is the best place to check for vacuum leaks what hoses?

Simply go to a local parts or hardware store and get a piece of vaccine hose that's identical in size(take your old hose from your map sensor with you if at all possible to match up the sizes), then buy the length you need as it's usally sold by the foot and take it back home an qndbinsrall it in place of the old one. If you have vacuum leaks or anything like that you can find the source by spraying carburetor cleaner very gently(like a mist) on the various vacuum lines of the engine(and the intake manifold) and it'll be very obvious if you hit a vacuum line that's leaking. Google how to check vacuum lknes with carb cleaner or watch a YouTube video explaining it and it'll be a trick you'll never forget, it's sinpe and effective! See Below, best of luck my friend!

Sounds like some type of vacuum leak. I have seen either small vacuum hoses off the intake or an actual Intake Gasket leak... Best check out is a Smoke machine test hooked up to any vacuum hose.. if not available , spray areas of hoses / and around engine intake with some type of cheap spray Throttle Cleaner .. small bursts.. if you have a leak and it sucks in the vapor it will make the engine stall/die. That will give you general area to start looking ..

One of two places the Coolant will escape from! Check all of ur hoses . For soft or swollen ! These engines are notorious for head problems!

There has been an issue of Suzuki engines smoking due to the PCV. valve or the baffles under the valve cover. One method of curing this is to place an oil separator between the vacuum line from the intake and the PCV. This will make for the need to keep an eye on it as it will fill up with oil eventually thus negating the purpose of placing it there in the first place. I think the big fix would be to remove the valve cover and check the oil baffles and filter therein. The problem is that oil builds up at the location of the PCV and is getting sucked into the intake via the vacuum hose to the intake. The quick fix? unplug the PCV and plug up the vacuum hose to the intake. This will get you by until you can get it to a mechanic. Anyway, That what I know. hope it helps

Sounds like a vacuum leak. Look for obvious vacuum hoses broken,squished or off. Check at egr valve, dpfe sensor & solenoid. These are all common to go bad. If not obvious take carb cleaner with snorkel attached, spray intake manifold & hoses etc. If idle raises while spraying you located vacuum leak. The propelent in the can temporarily seals leak while its being sprayed. Be careful not to spray on wires or anywhere there is a spark.

is there a check engine light on? did you change the spark plug wires?
you may have a intake gasket leak or possibly a cracked intake manifold. there is a simple test to try to determine if there is a leak in the intake but it can be potentially hazzardous. with a can of carberator cleaner, spray around the intake gasket and manifold. if the engine revs up, there is a leak. you can also purchase a vacuum gauge and test the amount of vavuum the engine makes. typically 17-22 hg. connect the gauge to a main vacuum port such as the hose to the brake vacuum booster

have you looked at all hoses from one end to other to see leakage

sounds like a vacuum leak, any rubber hose or even the intake boot could have a tear or crack in it. lightly spray carb cleaner over isolated places, if you hit the place where it is leaking, the engine will slightly rev up. try to narrow down your leak this way

Usually intake has to do with the induction system, as in intake manifold , The intake manifold can have several types of leaks, the intake can have a vacuum leak, oil leak, coolant leak or a combination of any of the before mentioned....hope this helps,

Sounds like an air leak somewhere after the air filter chamber.With engine idling spray some carb cleaner at different areas along the intake hose and the intake manifold,any place air can get in.If rpms change you have found leak.