An exhaust leak would sound like a light tick. Sounds like your cats may be shot.
Explain the "compressed air" coming out of the tips.
then eventually a check engine light saying you're running lean
Your air/fuel mixture isnt dependent on exhaust flow. If your o2 sensors actually do trigger the check engine light.... it actually makes your engine run richer by default.
an exhaust leak will sound loudest first thing in the morning with the engine stone cold. you'll get a loud tick that increases with rpm's and goes away as the engine heats up
then eventually a check engine light saying you're running lean
But if the leak is before the 02 sensor then its not getting all the fumes so it thinks that there is less fuel than there should be so it throws a lean code and makes you run rich.
never heard of anyone with a problem like that. most leaks happen at the exhaust manifold gaskets, either to the head or to the mid-pipe
if you think it's after the midpipe check and tighten the bolts on the catback-midpipe connection, only logical place i see it being. Magnaflow products (and OEM pieces) aren't known to rust apart and start leaking from weld joints
only way i know to check for a leak is to place your hand over where you think the leak might be or spray some soapy water on it and look for bubbles. you'll only have a few minutes to check before it heats up though
Thats what i said
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