Jump to content
SAU Community

Recommended Posts

Hey guys, i own a  1996 r33 gtst for the past 4 years. It has a 3 inch exhuast and front mount but apart from that is a stock car. Recently i have been hearing a whistle noise coming from the engine (trying to source where it is coming from it sounds like turbo or pod filter) doesnt matter if it is warm or cold it is always there only at idle.

Since it started the car has also began to flutter. Not all the time but if boost isnt fully built up it flutters when letting off the throttle. The bov is stock and has not been blocked off. 

I have checked most hoses for leaks and havent found anything. I am completely lost as to what it could be and cant find any threads that explain this at all.

Thanks for any help.

Link to comment
https://www.sau.com.au/forums/topic/480006-whistling-noise-at-idle/
Share on other sites

If you suspect your pod filter take it off and see if the noise goes away. How have you checked for leaks? You need to pressurize the system from the turbo to the throttle. Your turbo is 24 years old and could be due for reconditioning or replacement.

19 hours ago, GTSBoy said:

You have a vacuum leak somewhere, possibly an exhaust leak. Get yourself a piece of garden hose and go listening. This stuff is not so hard.

this is definitely where you start. seems like everyone jumps to the big issues before grabbing the garden hose, or a multimeter and actually running some tests for simple issues. theres not that much piping on a gts shouldn't be hard to find the leak m8. and turbo could still easily be bunged after 5 years. ive seen lots of reconditioned turbos bite the dust early.could even be cracked housing on intake side of turbo ive seen this too. do the garden hose test and shout back...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • From my youth: GTi-R clutch change is a massive pain. The gearboxes are fragile? But the car is super cool and I want one 馃槩 
    • Remember this is 1988 tech.
    • Driveline vibration is resolved. I ended up loosening all my engine mount and trans mount bolts, giving it a good shake then retightening everything and it's gone... Let's just say I was surprised that fixed it.  I've been happily driving it around again but unfortunately put zero time into my direct port/constant pressure WMI setup. I'm on vacation next week, so I'll try and finalize it then.  On a different note, I spent all week fuel/ignition mapping 2x 216L V16 engines. Turbo's were burning glycol and we swapped them out for larger units. We also had planned emissions testing on site, so I figured I'd be there the same week to use their instrumentation and massage any emissions issues out if needed. This was a first for me. Fuel management is similar in certain ways to automotive (i.e air density as load variable) but very different in others. It's all PLC based and AFR's are controlled by air and not fuel. They use a control valve between the turbo and air manifold to control pressure which in turn controls AFR's. Due to this, target AFR tables supplied by the OEM are in pressures and not mass which really through me off. They use air pressure vs fuel pressure tables. I also relied on an O2 concentration sensor the emissions team had in the exhaust. Ignition timing was also all over the place and we were losing a fair bit of power. They're now happily sitting at 16-40BTDC depending on load. We were making about 1600kw at 900rpm at 90% load. Engines were running a lot smoother as well.    
    • heh, aint no R32 ever meeting modern targa cage rules unless the driver is veeeery short OP, good luck with the sale, since its already in the land of freedom I'm sure you will find a good buyer.
    • meh, it was a good video, clear about the issue and how he dealt with it. A bit heavy on the RTV and very brave to put an RB in anything without rebuilding it first, but otherwise I thought it was good Dose, I'm not sure that having the pickup forward is a big issue; yes of course the oil could shift under brakes but the sump should never be empty enough for that to be a problem (unless you also have a higher volume oil pump, and that oil can't return from the head to the sump quickly enough)
  • Create New...