07Maliboo

iTrader: (2)

hey,
I jsut got an injen intake and I got the cel with the p0171 code, I know that's not too big a deal and hopefully I can have my dealer update my ecu since i'm under warranty, but when I shut down my engine I hear a little backfire almost. it's like the tb is throwin up back into my intake. any idea as to what that sound is or if it's even a big deal?

Psykostevo

sometimes you can hear the throttle blade close while the rotors in the SC are still spinning. Maybe that's what you hear? Oh nevermind, I just put my reading glasses on LOL!

umrdyldo

iTrader: (1)

lol, i get a loud noise of the TB closing, it happens about a full second after the car is off.

07Maliboo

iTrader: (2)

yeah it's kinda loud but doesn't seem to hurt the car as far as I can tell. I'm having my cel looked at by the dealer tomorrow, hopefully they can upgrade my ecu so I don't get the damn code thrown at me again for my beautiful intake.

07blackg5

iTrader: (8)

is it just like a deep cough noise? mine does that. its normal.

07Maliboo

iTrader: (2)

ok sounds like it's no big deal then

Psykostevo

Oh are you talking about the pressure equalizing, like a wheezing noise? That's harmless that's just the pressure coming back out the intake because it now has nowhere to go except back out the filter.

07Maliboo

iTrader: (2)

ah, yeah that's what it is. I just never heard it before so I had to check. ha ha.

KillerBee

i thought you guys were talking about the monkey in the trunk

wisemanonice

I never heard a noise come from the front of my car when I turn it off. just the e-brake popping or exaust ticking

whitebolt_ss

I had the same weird engine noise, To me it looked like it was coming somewhere along my K&n intake. But when I got an oil change at the dealer, I told them about it , and they fixed it. Try asking your dealership

SilvrLT

I have that problem with my GMPP intake too on my 2.4l sound like the pop when you shut off the car.

umrdyldo

iTrader: (1)

It's not a monkey in the trunk, they prefer to be called chimps.

This intake or TB noise is common, maybe the stock intake just baffles the sound better than the aftermarket intake does.

SilvrLT

Yeah I agree, cuz my 2.2l did it as well

RS75GT 1SS

Trunk Monkey FTW!