Thread: Possible vacuum leak/replacing gaskets

I've got an 05 GT, and once it's running and up to temperature it makes an occasional noise at idle and certain RPM's. I can't quite tell if it's a high pitched rattle or squeal, but it's very faint and is definitely coming from the front end.

I can only really hear it inside the car though as it's relatively quiet, so I suspect it is a vacuum leak somewhere in line. It runs runs great, but it will occasionally want to stall out on start up, only if the engine is warm, it revs too high when cold. I'd say one in every ten or so starts warm it will do that, and has only stalled out once.

The car has about 85,000 on it so I figured it would be a good idea to replace gaskets and seals anyways as it couldn't hurt and is a relatively cheap thing to do. What gaskets would you guys recommend replacing?

I'm thinking definitely replace the front and rear valve cover gaskets, and the throttle body gaskets, but what other ones would be worthwhile replacing? Head gaskets don't seem to be much of an issue with these engines, but I should probably look at the LIM gasket for the hell of it. I think it's already got an aluminum as it's an 05 but couldn't hurt.

Thanks for any input guys, using whatever spare cash I have this summer to do as much maintenance work as I can in addition to prepping for my sound system (just wiring and better speakers to keep up with the Fi's, the Infinity Kappa coaxials aren't gonna cut it).

I would start be removing the TB and cleaning it until it shines, then clean or replace the IAC. Then clean the MAF with approved cleaner and see what you get. I would suspect that with that mileage on it the backside of the TB butterfly is carboned up and likely sticking.

Sounds like this car I was recently working on. Turned out to be a very small crack on one of the evap lines. The tb cleaning could also be it. Head gaskets and lim gaskets r very unlikely due to the mileage, and u would have many other problems in that case.

I'll look st all of those things and clean everything for the hell of it and update in a week and a half when I get my paycheck, working off like $20 right now due to a citation and a recent "excursion", bi-weekly paychecks get to me sometimes :/