R33_Rob Posted June 19, 2006 Share Posted June 19, 2006 Today my '94 R33 GTS was driving fine.. no worries. Then when i went to drive home from the physio i had a strange sound comming from under my car. The sound was was comming from middle (underneath the gearbox) or towards the back of the car. I noticed it when i was stationary (in first gear with clutch in) and in neutral with clutch all the way out. I could hear the sound most of the way home and i was driving in 50 - 100km zones. When i pulled up at the lights the sound was terribly loud. But when i raised the RPM to 1200-1500 the sound was gone.. but that really puzzles me. But then again I dont know if it was drowned out by the loudness of my exhaust because it is a 5" exhaust. So moral of the story is that I hear the noise whenever my car is on, but it is loudest when idling. I thought maybe my exhaust had come loose but i checked and it looked fine. Prehaps a screw has fallen into the pipe (is this possible?) Any help is greatly appreciated. Link to comment https://www.sau.com.au/forums/topic/122857-shrapnell-in-my-exhaust/ Share on other sites More sharing options...
RB30-POWER Posted June 19, 2006 Share Posted June 19, 2006 Could be part of the catalytic convertor honey comb that has collapsed and broken off. Link to comment https://www.sau.com.au/forums/topic/122857-shrapnell-in-my-exhaust/#findComment-2268695 Share on other sites More sharing options...
R33_Rob Posted June 19, 2006 Author Share Posted June 19, 2006 is that expensive to replace? Link to comment https://www.sau.com.au/forums/topic/122857-shrapnell-in-my-exhaust/#findComment-2268709 Share on other sites More sharing options...
R33S2 Posted June 19, 2006 Share Posted June 19, 2006 Hows the boost, is your turbo OK? Too many bits in that area to pinpiont just the zoorst. Link to comment https://www.sau.com.au/forums/topic/122857-shrapnell-in-my-exhaust/#findComment-2268812 Share on other sites More sharing options...
R33_Rob Posted June 19, 2006 Author Share Posted June 19, 2006 Its a non turbo. It has virtually no engine mods, except for exhaust, pod filter, strut brace. Does that narrow it down? Link to comment https://www.sau.com.au/forums/topic/122857-shrapnell-in-my-exhaust/#findComment-2268838 Share on other sites More sharing options...
R33S2 Posted June 19, 2006 Share Posted June 19, 2006 Not really it could be outer gear box related get it on a hoist or a least a pit of some sort and find the bastard it'll drive you nuts or possibly break and do more damage, then again it could be just a cover of some sort and nothing too bad at all. Link to comment https://www.sau.com.au/forums/topic/122857-shrapnell-in-my-exhaust/#findComment-2268966 Share on other sites More sharing options...
R33_Rob Posted June 19, 2006 Author Share Posted June 19, 2006 yea, im definately having it checked tomorrow. Link to comment https://www.sau.com.au/forums/topic/122857-shrapnell-in-my-exhaust/#findComment-2269020 Share on other sites More sharing options...
R33_Rob Posted June 19, 2006 Author Share Posted June 19, 2006 i forgot to mention, recently i have had a "bit more than usual" amount of white smoke comming out my exhaust pipe. And 4 days ago my car nearly stalled when i tried to start it. Normally it starts perfectly 1st time every time Link to comment https://www.sau.com.au/forums/topic/122857-shrapnell-in-my-exhaust/#findComment-2269095 Share on other sites More sharing options...
R33_Rob Posted June 20, 2006 Author Share Posted June 20, 2006 (edited) BUMP This morning it only made the weird sound below idling point (below 800RPM). This occured when i would slowly change gears without giving the car any gas Edited June 20, 2006 by R33_Rob Link to comment https://www.sau.com.au/forums/topic/122857-shrapnell-in-my-exhaust/#findComment-2270556 Share on other sites More sharing options...
Craved Posted June 20, 2006 Share Posted June 20, 2006 turn the car off, and kick or hit the exhaust gently with a mallet... if it rattles then your Cat is broken and you'll need a new one.. Link to comment https://www.sau.com.au/forums/topic/122857-shrapnell-in-my-exhaust/#findComment-2271985 Share on other sites More sharing options...
R33_Rob Posted June 20, 2006 Author Share Posted June 20, 2006 Took it into an exhaust place today. I drove it up on the lift, and within 10 seconds they told me it was the cat. Thanks for your help fellas Link to comment https://www.sau.com.au/forums/topic/122857-shrapnell-in-my-exhaust/#findComment-2272097 Share on other sites More sharing options...
RB30-POWER Posted June 20, 2006 Share Posted June 20, 2006 Should pick up some power again once its replaced and there is no blockage. Link to comment https://www.sau.com.au/forums/topic/122857-shrapnell-in-my-exhaust/#findComment-2272237 Share on other sites More sharing options...
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