jian3979

iTrader: (1)

IS350 suddenly lost power After install IS F exhaust? do i missing anything that need to correct after install it? like missing gasket?(maybe it is leaking) or somewhere.

Please advise

ArmyofOne

Could be, but it would have to be a pretty serious exhaust leak. Did you get all the donut seals back into place?

RTIS250

iTrader: (9)

Im assuming you mean the FSport exhaust? There really isnt much back there that could be messed up and cause a noticeable loss in power. An exhaust leak wont do much, especially if its far away from the sensors. Do you have any check engine lights?

mitsuguy

iTrader: (2)

I'm curious if you didn't do anything to the O2 sensors... Even if its not close, messing around in that area might have knocked one loose... I'm with RT - is the check engine light? For all intents and purposes, you could cut the exhaust off after the back o2 sensors and the computer could care less...

ArmyofOne

Very true, I wasnt aware that the Fsport was a cat back. I need to do more research on these things...but the lack of time is killing me.

without a CEL this will be particularly difficult to diagnose. O2 sensors or even a plugged cat or 2 could be the cause, but the cats you would have noticed before the swap....

jian3979

iTrader: (1)

It is F sport exhaust,

it doesn't have any CEL is on, i will double check again this weekend, make sure there is no leakin on the pipe... i dont think it touch O2 sensor before..

100degrees

iTrader: (1)

F sport is NOT a catback. It is only an axleback. Unless you went with a Invidia or Megan midpipe, you were nowhere close to messing with the o2 sensors as they are toward the front of the midpipe.


Like other's mentioned, did you install gaskets? The exhaust comes with O ring gaskets and you re-use the stock donut gasket for the midpipe. Also make sure the bolts are tight.

You many also want to pull the batt and have the computer relearn your driving habits.