jar032

I have an 04 tl that is making a hissing noise under acceleration and feels sluggish. it feels like it wont rev past 4000 rpms..
I already replaced air temp sensor..
Could it be clogged catalytic converters??

any help would be appreciated

justnspace

iTrader: (1)

Do you have a check engine light on?

EvilVirus

iTrader: (8)

^ +1

Does it idle abnormally? Have you check you hoses? Also if you have a stock intake, check the tubing to see if there are any tears.

jar032

No check engine light.. it idles rough when could and smells like fuel

ZOMGVTEK

With the engine at idle, unplug each coil pack separately and listen to the engine. You should notice unplugging each plug makes the car idle worse. If you get to one cylinder that does nothing, find out why.

nfnsquared

Snakes on a TL??

jar032

i unplugged each coil every one made the engine idle worse so all cylinders work

Andrew Park

if you hear a hissing noise it might be a vacuum hose leak

jar032

i checked i dont see any vacuum hoses that are disconnected

jar032

it only hisses under acceleration

jar032