03'55AMG

Whilst I was cleaning the engine bay( with the engine on) I heard what either was a vacuum or an air leak right by the driverside exhaust manifold. It hissed louder as I revved up to 3000 Rpms. It's not constant though. It almost sputters but it doesn't appear to be a BIG leak, just like air coming out of a bike tire through a small hole. I'm also noticing a rough idle. And to those that read my "found split hose under airbox" thread, it is not this hose. Any ideas?

03'55AMG

Anybody?

OK55

Hard to tell, these cars make all sorts of 'odd' sounds...! Any other symptoms?
Brgds

03'55AMG

There's no CELs, just a hissing sound and rough idle. Car has also ben running 10-15 degree celcius warmer than usual... Very weird. Trying to get the codes (if any) pulled, but nobody near me within 40 miles can do it.. Lol

Roverron

Try taking high resolution pictures with good lighting where you are hearing sound and post them maybe someone will see something you don't

03'55AMG

I could barely fit my hand in the area its coming from, let alone a camera.. I'll try and find a side view picture of the M113 and circle the area in paint

EdoubleNickel

it's a vacuum leak. had one couple months ago, it threw a CEL. You will need a clamp that's all. Take a look at it in the morning, it's right behind the left bank of the engine toward the fire wall.

03'55AMG

It's not that far back, right by the exhaust manifold close to the Oil input cap thing the engine cover goes over

cal1

I had a return (I think) hose from the PCV come loose once. The hose came loose near the drivers side of the TB or near the TB if I remember correctly. It caused slightly rough idle and a stronger than normal fuely exhaust smell. If it is not the vacuum leak EdoubleNickel metioned, let me know and I will snap a photo of the area I am talking about.

03'55AMG

I dont even know if it's a vacuum or air so well see

cal1

I missed this post. What I was trying to describe is most likely not your problem based on the location you explained above.

03'55AMG

Maybe Its the exh. Manifold gasket? I just can't seem to pinpoint it.. I know I'm close but I can't feel compresse air or suction.. What would cause high operating temps and a rough idle?

EdoubleNickel

oh ok.

evilpenif

Did you ever get to the bottom of this?