after being at WOT for a few seconds i get this TSSHHH sound. it almost sounds like a weak blow off valve. any help is appreciated thanks.
it seems im having problem after problem with this car, now im thinking of getting rid of it

 

Mods?

 

do u have test pipes? Is it rasp ur talkin bout?

 

i have a K&N intake, Crawford plenum, borla exhaust. no test pipes just stock cats. its not a rasp, it really sounds like a weak BOV. it does it when i let off only, and not gradual but half a second after i let off i hear the sound "Tsshhh"

 

The intake? I know my popcharger has a slight whistle sound to it at times.

 

Talk about hard to diagnose.

 

More info would be good. What RPM does it show up at? Does it show up under other than WOT conditions? Can you tell where it's coming from? Help us help you!!!

 

dude honestly like clockwork if i open her up from first to second of course the engine is loud but i can hear it from under the hood through all gears. another example is lets say I'm cruising, i take off from a light all cool then shift to second and in second i slam on the gas for a few seconds but not redlining it maybe to 5k and let off i hear it louder. this is hard to explain for me but I'm hoping I'm giving a clear example but i do know what a his sound coming from an intake makes but this is more like a reverse sound of when you depress and release the pedal quick and that sound it makes but it makes it when you release. hope this makes sence. this does not show up under any other condition other than WOT

 

sounds like me. that's why i'm saving myself the hassle and selling it. i'm lookin for an 06... or at least an 05.

 

This is the first time I've ever been on this forum at night, some of you guys post things at like 4 in the morning...what the deal? Is the Tsshhh just for a second or so or does it like slowly make that noise?

 

it is only for that one second when i release the pedal from WOT.
yea plya im thinking of an 06 also or an 05.

 

Mine's an 05 and I haven't had problems besides any recalls..I hear sounds, but I just assume they are normal bc the car runs fine. When you have a car like that, I know it's only normal to be **** about every little thing kinda like a hypochondriac...ya know what I'm saying?

 

Does your car feel weird after it makes that sound? It could just be pressure releasing

 

OK someone walking on the sidewalk when i pass them, at that moment will here the sound

 

Got vacuum?

 

you know i didnt want to add that but i herd something like that once yesterday

 

yea its a hoover, why?

 

lol...

Vacuum leaks can make a hissing sound but that would generally cause idling problems too....

No idle problems? Not throwing any codes?

 

What's the last mod you did? How long after the mod did the sound start?

It might also be your fuel being cut off when you hit the rev limiter. Make sure you're shifting correctly at the right time.