KA-T "help"sounds bad! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

S14DriftstaiN · 06-28-2006, 07:46 PM

I have a greddy turbo kit on my ka...and was running good,for like 2 months... when I let off the gas there is a shshsh sound..im thinking its compresor surging.now today i go to drive to work and evrything seemed fine, however. when hitting boost i could here that shsh sound as im boosting before,you could only here it sucking air.and now the boost gauge is jumpy and hopy under boost..never over the set 6psi????there is very little shaft play"turbo is only 3 monthes old"HELP!!!!!!!!

S14DriftstaiN · 06-28-2006, 07:50 PM

and it seems the pitch in the sound of the turbo is difrent.and realy bad when boost gauge is boucy....andthe car would buck as this happend...wastegate??

SpeedMonkeyInc · 06-28-2006, 07:58 PM

Has your BOV been working?

Y4555 · 06-28-2006, 09:05 PM

check your intercooler piping.

Realchaos1 · 06-28-2006, 09:15 PM

can i buy the kit? ship to 98221

S14DriftstaiN · 06-29-2006, 06:59 AM

all i/c pipes are tight.there is a little shaft play,but the blades are not toching the sides..I took the bov "off"..still same thing.let of the gas a shshshs sound.and hitting boost is i can hear the same sound,just not as fast..the only thing i can think of that would make the boost gauge bounce and the car buck and make bad sounds like that all at one is one of 2 things wastegate spring(internal)or that there is to much impeller shaftplay...any one had there boost gauge bounce and why?

SpeedMonkeyInc · 06-29-2006, 09:49 AM

Why did you take you BOV off? A little bit of shaft play is normal, so long as its not really bad the turbo sounds fine.
You could take the wastegate off and have a look, just to be sure its working right, but I don't think that is your problem.
Sounds to me like you have a leak someplace. I would take off every IC pipe coupler and inspect each one for tears, then re-install.

S14DriftstaiN · 06-29-2006, 10:26 AM

to make shure the bov is not working. it made no difrence in sound or performance however this bucking and surging boost gauge is new.im running 6 psi on 20g turbo,its 3 months old???no oil in turbo housings,andthe turbo is getting oil.but the sound the turbo makes when buckin and surging is scary,like the pshshsh surg i get from letting off the thottle...but as im boostin???its internaly w/gated and the arm does move?..does this sound like a leak in the i/c??..never had one.

S14DriftstaiN · 06-30-2006, 07:44 PM

Ok I have been driving it around.it only does it when I just start to hit boost and if i hold it rite at like 0-1psi, it will buck and shake,if I slowly give it more gas it will buck and the a/f and boost gauge jump up and down and it gets worse as i hit it.but only slowly.If I stab it it moves and makes boost fine....anyone?

TooFartyS14 · 06-30-2006, 08:46 PM

sounds like a boost leak

S14DriftstaiN · 06-30-2006, 10:11 PM

all i/c pipes are tight,...what about avacuum leak Im at 20 idle??i think thats fine?the tubo does sound louder?Its just if I hold Itat 0-1psi it will shutter and buck?

S14DriftstaiN · 08-12-2006, 06:55 AM

The turbo is fine and evrything is working thanks for the help fellas.

06-28-2006, 07:46 PM	#1
S14DriftstaiN Leaky Injector Join Date: May 2003 Location: philly Age: 45 Posts: 85 Trader Rating: (0) Feedback Score: 0 reviews	KA-T "help"sounds bad! I have a greddy turbo kit on my ka...and was running good,for like 2 months... when I let off the gas there is a shshsh sound..im thinking its compresor surging.now today i go to drive to work and evrything seemed fine, however. when hitting boost i could here that shsh sound as im boosting before,you could only here it sucking air.and now the boost gauge is jumpy and hopy under boost..never over the set 6psi????there is very little shaft play"turbo is only 3 monthes old"HELP!!!!!!!!

06-30-2006, 08:46 PM	#10
TooFartyS14 Leaky Injector Join Date: Jan 2003 Location: Houston Age: 41 Posts: 54 Trader Rating: (0) Feedback Score: 0 reviews	sounds like a boost leak __________________ Ron Image Exceeded Forum Limits

06-28-2006, 07:50 PM	#2
S14DriftstaiN Leaky Injector Join Date: May 2003 Location: philly Age: 45 Posts: 85 Trader Rating: (0) Feedback Score: 0 reviews	and it seems the pitch in the sound of the turbo is difrent.and realy bad when boost gauge is boucy....andthe car would buck as this happend...wastegate??

06-28-2006, 07:58 PM	#3
SpeedMonkeyInc Zilvia FREAK! Join Date: Apr 2003 Location: Oakland Age: 45 Posts: 1,271 Trader Rating: (0) Feedback Score: 0 reviews	Has your BOV been working?

06-28-2006, 09:05 PM	#4
Y4555 Join Date: Oct 2005 Location: NH Posts: 19 Trader Rating: (2) Feedback Score: 2 reviews	check your intercooler piping.

06-28-2006, 09:15 PM	#5
Realchaos1 Zilvia Member Join Date: Aug 2004 Location: Anacortes Wa Posts: 177 Trader Rating: (0) Feedback Score: 0 reviews	can i buy the kit? ship to 98221

06-29-2006, 06:59 AM	#6
S14DriftstaiN Leaky Injector Join Date: May 2003 Location: philly Age: 45 Posts: 85 Trader Rating: (0) Feedback Score: 0 reviews	all i/c pipes are tight.there is a little shaft play,but the blades are not toching the sides..I took the bov "off"..still same thing.let of the gas a shshshs sound.and hitting boost is i can hear the same sound,just not as fast..the only thing i can think of that would make the boost gauge bounce and the car buck and make bad sounds like that all at one is one of 2 things wastegate spring(internal)or that there is to much impeller shaftplay...any one had there boost gauge bounce and why?

06-29-2006, 09:49 AM	#7
SpeedMonkeyInc Zilvia FREAK! Join Date: Apr 2003 Location: Oakland Age: 45 Posts: 1,271 Trader Rating: (0) Feedback Score: 0 reviews	Why did you take you BOV off? A little bit of shaft play is normal, so long as its not really bad the turbo sounds fine. You could take the wastegate off and have a look, just to be sure its working right, but I don't think that is your problem. Sounds to me like you have a leak someplace. I would take off every IC pipe coupler and inspect each one for tears, then re-install.

06-29-2006, 10:26 AM	#8
S14DriftstaiN Leaky Injector Join Date: May 2003 Location: philly Age: 45 Posts: 85 Trader Rating: (0) Feedback Score: 0 reviews	to make shure the bov is not working. it made no difrence in sound or performance however this bucking and surging boost gauge is new.im running 6 psi on 20g turbo,its 3 months old???no oil in turbo housings,andthe turbo is getting oil.but the sound the turbo makes when buckin and surging is scary,like the pshshsh surg i get from letting off the thottle...but as im boostin???its internaly w/gated and the arm does move?..does this sound like a leak in the i/c??..never had one.

06-30-2006, 07:44 PM	#9
S14DriftstaiN Leaky Injector Join Date: May 2003 Location: philly Age: 45 Posts: 85 Trader Rating: (0) Feedback Score: 0 reviews	Ok I have been driving it around.it only does it when I just start to hit boost and if i hold it rite at like 0-1psi, it will buck and shake,if I slowly give it more gas it will buck and the a/f and boost gauge jump up and down and it gets worse as i hit it.but only slowly.If I stab it it moves and makes boost fine....anyone?

06-30-2006, 10:11 PM	#11
S14DriftstaiN Leaky Injector Join Date: May 2003 Location: philly Age: 45 Posts: 85 Trader Rating: (0) Feedback Score: 0 reviews	all i/c pipes are tight,...what about avacuum leak Im at 20 idle??i think thats fine?the tubo does sound louder?Its just if I hold Itat 0-1psi it will shutter and buck?

08-12-2006, 06:55 AM	#12
S14DriftstaiN Leaky Injector Join Date: May 2003 Location: philly Age: 45 Posts: 85 Trader Rating: (0) Feedback Score: 0 reviews	The turbo is fine and evrything is working thanks for the help fellas.