Scooby Posted September 5, 2007 Share Posted September 5, 2007 hope someone can help me out with this, there's a noise that sometimes comes from the rear of the car after shut down. quite loud, but disappears before i can get under the car. hard part is describing it. it's not a buzzing sound and i don't think it's the fuel pump as it doesn't sound muffled as though it's in the tank. sounds like a small foghorn, lasts for a few seconds then dies away. almost like a seal letting go under pressure and then sealing again as the pressure decreases. Link to comment https://www.sau.com.au/forums/topic/183843-noise-from-rear-of-r32-gtr/ Share on other sites More sharing options...
Swiper the Fox Posted September 5, 2007 Share Posted September 5, 2007 hope someone can help me out with this, there's a noise that sometimes comes from the rear of the car after shut down. quite loud, but disappears before i can get under the car. hard part is describing it. it's not a buzzing sound and i don't think it's the fuel pump as it doesn't sound muffled as though it's in the tank. sounds like a small foghorn, lasts for a few seconds then dies away. almost like a seal letting go under pressure and then sealing again as the pressure decreases. sounds like the HICAS rear equalisation pump...evenly distributes the fluid pressure in the rear rack on shutdown. Link to comment https://www.sau.com.au/forums/topic/183843-noise-from-rear-of-r32-gtr/#findComment-3329673 Share on other sites More sharing options...
Scooby Posted September 5, 2007 Author Share Posted September 5, 2007 sounds like the HICAS rear equalisation pump...evenly distributes the fluid pressure in the rear rack on shutdown. Hi Paul, didn't know they did that. Is there a pump that sits near the ATTESSA pump that does this? Mine no longer has the rear rack but if there's a pump that performs that function maybe it's having a wobbly. Link to comment https://www.sau.com.au/forums/topic/183843-noise-from-rear-of-r32-gtr/#findComment-3329729 Share on other sites More sharing options...
Swiper the Fox Posted September 5, 2007 Share Posted September 5, 2007 Hi Paul, didn't know they did that. Is there a pump that sits near the ATTESSA pump that does this? Mine no longer has the rear rack but if there's a pump that performs that function maybe it's having a wobbly. remove the plug from it...its next to the diff on the drivers side from memory. since i removed all the HICAS gear from mine ive never heard that noise again...so yes its the HICAS...its like a groaning noise hey? it may not be a pump but a pair of solinoids pulsing. Link to comment https://www.sau.com.au/forums/topic/183843-noise-from-rear-of-r32-gtr/#findComment-3329750 Share on other sites More sharing options...
Scooby Posted November 1, 2007 Author Share Posted November 1, 2007 Seems I'm getting a vacuum build up in my tank. The noise stops when I release the filler cap, with an accompanying rush of air. Anyone has had this issue before? Cheers Link to comment https://www.sau.com.au/forums/topic/183843-noise-from-rear-of-r32-gtr/#findComment-3449349 Share on other sites More sharing options...
Scooby Posted December 9, 2008 Author Share Posted December 9, 2008 (edited) old topic but 12 months later and i've found the prob in an idle afternoon. seems to be the fuel check valve between the tank and charcoal can. if you apply vacuum to the fuel tank line where it normally joins to the can, it replicates the noise. no more strange fart$ng noises. Edited December 9, 2008 by Scooby Link to comment https://www.sau.com.au/forums/topic/183843-noise-from-rear-of-r32-gtr/#findComment-4307845 Share on other sites More sharing options...
Ronin 09 Posted December 10, 2008 Share Posted December 10, 2008 holy dig your own thread up scooby! Link to comment https://www.sau.com.au/forums/topic/183843-noise-from-rear-of-r32-gtr/#findComment-4309787 Share on other sites More sharing options...
SandalsBoy Posted December 10, 2008 Share Posted December 10, 2008 nice one good to see people posting up the solutions once found for others to resource later. Link to comment https://www.sau.com.au/forums/topic/183843-noise-from-rear-of-r32-gtr/#findComment-4310284 Share on other sites More sharing options...
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