1998 galant es 2.4 idle is out of wack.

[minionseals]

when starting it goes up to almost 2k then back down to 500 before stalling out. what could be the cause?

[mko]

look for vacuum leak, or the IAC is bad

[minionseals]

how do i look for a leak

[Galanttuner10]

not sure how to check for a leak but i had this problem on my 7g and it was the idle air control motor.. its the iac motor if you give it gas 2 keep it at normal idle when u first start it then its fine after like 10 seconds

[Kalamidad]

buy a can of brake cleaner at autozone or one of those, turn the car on and spray it at all the places where air might be scaping.

do you have a stock or aftermarket intake?

If you have aftermarket and your car is an 4 banger, check your intake manifold (The big Black peice of piping behind the engine where the intake connects to, check to see that it has not cracked behind the throttle body {the metal peice between the intake manifold and the intake}) if the car is shutting off, it has to be a pretty big leak which sounds 100% like a broken intake manifold. update us on your findings.

[4-G-rim]

Try another MAF sensor.

[Galanttuner10]

my mass air sensor went on my old 7g but it just idled rough it never died but it did this when the iac went on my current g
let us know how its goin

[airborneparainf82]

if your MAF or any other sensor goes out to cause a rough idle, it would throw a code correct?

[Galanttuner10]

yes it wood throw a code but he didnt mention a code so thats y i believe its the iac motor

edit: the iac also throws a cel code but the iac has gone on 2 gs for me.. a little unlucky.. and these were the symptoms

[EvoTheDon]

I'm having the same problem. Any suggestions websites that sell MAF for 7G Galants. I would just go to the shop, but I've had bad experiences with auto shops around here, so I try to do everything myself.