Exhaust Leak Help

[97_GT]

What problems can an exhaust leak cause? Someone told me that I have a leak and I was wondering if it is something that needs to get fixed right away and if it is causing my idle problems.

[Thomas91169]

well if its pre-cats itll cause the exhaust to try to go out the leak area instead of going through the catalytics. if its a leak before the upstream o2 sensors (closest to the engine) the o2's wont read what they should and may throw a code. in that case the only place there could be a leak is between the manifold and downtubes.

can you hear a leak? when you get on it does the car sound like crap, like a high pitched raspy sound coming from under the car?

[97_GT]

The guy at autozone said he thinks there is a leak but I dont know much about it. It lost its raspy sound and idles really high. Whenever I shift, the rpms stay at the spot i shifted at and fall really slow.

[Thomas91169]

the slow drop of rpm is a mustang thing. most of it due to the tune. unless yours drops extra slow...

you might try cleaning out your IAC and cleaning the maf for starters. take carb cleaner to the iac and electronic cleaner (usually next to the carb cleaner at autozone) and spray the maf with it. could be the throttle position sensor

[97_GT]

The rpms fall a lot slower than they used to and I already put a new AIC in so it cant be that. What else could it be

[1996stang]

TPS sensor they are very cheap and only a plug and 2 screws holding them on.

[97_GT]

Just get a new one?

[ridenmystang]

Get the crack welded. Its only like $20 at the muffler shop

[1996stang]

Quote: Originally Posted by 97_GT Just get a new one?

If its bad get a new one.