Strange Noise After Fitting My Boost Gauge

[tufff33]

hiya fellas,

Iv just recently purchased a '96 Series 2 R33 GTS-T. it came with 18's, lowered, stereo, front mount, Blitz pod filter, 3.5" cat back Tanabe "jasma" exhaust. Anyway ive had it for exactly 2months now. shes running stock boost etc. i purchased a boost guage and a NON electronic boost controller.

I was told to wait to get them both fitted when i get it dynoed after the new year and after i get a 3" full dump/font pipe/high flow cat. I just had to muck around with things and get all figidy (use to own a VLCT that i used to do my own work to). Anyway the problem developed after i installed the boost guage. The readings are fine. On idle it sits -19 Vacuum and on boost it hits 7psi (no spiking). Now when i started cruising around the block slowly, i could hear the left hand side of the motor wasnt sounding right so i pulled over and i knelt down on the left side of my car at the front where the front pipe is and it sounds like an exhaust leak or perhaps an exhaust manifold gasket leak as those sounds are very distingiushable.

i am totally baffled. Unless its a huge coicidence which i doubt, how could fitting a simple boost gauge cause this? Even with the bonnet up if i give it a few soft revs, u can totally hear somethings not right. Power wise, it feels pretty much the same. the noise comes from the left where the turbs is and im confused and in need of opinions/advice or knowledge from someone who may have had this same problem. any help would be much appreciated.

cheers

[r33cruiser]

is it a hissing sound?

if yes,, i would venture a guess that either the join of hose from the engine, or on the gauge is leaking.

[tufff33]

is it a hissing sound?

if yes,, i would venture a guess that either the join of hose from the engine, or on the gauge is leaking.

no, not so much hissing, its on the left if ur in the car facing it but outside looking at bay, sound is coming from the right where the turbo/exh manifold is and a bit lower down where the dump pipe is. its more noticeable when driving it. The guage hose is on the left where the inlet manifold/fuel filter side is. come to think of it, it slight hisses on that side but it always does it if that helps?

im stressin a bit cos i know if had've waited to get the 3" dumphi flow cat fitted then dynoed, i know this would not have occured. a bit of the noise came from the head as well. perhaps the cam? its the exh side cam (obviously)

ah wel, 2moro ill just disconnect the guage, have it back to b4 and sees if theres a change. I doubt it. Any other suggestions may help? Cheers r33cruiser

[tufff33]

today i removed the boost guage and had it to how things were b4 it started to make that noise. After having done all that, it still makes that sound.

the sound comes from the turbo region and sounds as though as little pebbles are flying around under the heat shield. Very hard noise to describe. It just sounds like an exhaust leak. Its doing my head in. Any other suggestions pls peoples??

When i pull/hold the throttle cable at low rpm, thats when u can really hear it, also the noise extends down the front pipe. 1st i thought a piece of the turbine wheel had fallen off and lodged in between the front pipe and cat but under full throttle on the road, it goes fine plus this annoying ass noise. Idle is perfect, not blowing smoke... what could it be?

Any help would much be appreciated.

[uraah]

sounds like a turbo gasket leak to me! had a similar problem on my old silvia wasn't overly expensive to fix but wasn't exactly cheap!

get all the gaskets changed ie, manifold, dumpipe/flange better to be safe then sorry

[tufff33]

my car is for sale guys.. i have adverrtised it for a while but have had time to get online to post up my pics.. ill try now see if it works. asking price 12.5k

[tufff33]

Yes it was indeed a turbo gasket leak (exh manifold gasket) so i got that changed along with the turbo to manifold gasket, dump pipe gasket and all brand new head studs to hold the exh manifold..

[tufff33]

my car is for sale guys.. i have adverrtised it for a while but have had time to get online to post up my pics.. ill try now see if it works. asking price 12.5k

my car is still up for sale...

Price drop- $11,000

MUST SELL