Cricket/Cicada noise on boost (Spirit R)
#1
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Cricket/Cicada noise on boost (Spirit R)
ok so I've got this fluttering/rattling/whistle noise that's becoming a real mystery and a pain in the ****. 99% sure its not a boost leak. (Car is stock standard other than powerFC)
We thought for a while it was pinging, and it sounds VERY similar to pinging, but its happening to low in the rev range (starts at about 3000rpm) and when I took 5 degrees out of the timing it still did it (and according to hitman there's no way it can ping with 5' out of the timing).
So it could be a dying Turbo - but then again its actually starting at 3000rpm, noise goes away seemingly when the turbo overlap happens then comes back on full boost with the second turbo. ie. noise happens on both turbos so unlikely to be dying turbos (since they pretty much operate independently and its not Formula 1 quality so the exact same prob couldn't happen to both turbos at exact same time).
So now we're thinking its either:
A: Control flap in the Y-Pipe
B: somewhere in the air intake
C: somewhere in the exhaust (cat converter??) .. and my gf said she could hear really loudly in her car behind, over her exhaust and radio
Anyone experience any noise like this before?
To clarify it sounds just like 'crickets' or 'cicadas' making there noise at night, but a longer drawn out version (instead of 'crick crick circk...")
Or as my mechanic said it sounds very similar to pinging but less violent than pinging.
very bloody frustrating - i'm tempted to get it on a dyno just so I can replicate the sound and listen from the outside to see where the noise is coming from exactly ...
We thought for a while it was pinging, and it sounds VERY similar to pinging, but its happening to low in the rev range (starts at about 3000rpm) and when I took 5 degrees out of the timing it still did it (and according to hitman there's no way it can ping with 5' out of the timing).
So it could be a dying Turbo - but then again its actually starting at 3000rpm, noise goes away seemingly when the turbo overlap happens then comes back on full boost with the second turbo. ie. noise happens on both turbos so unlikely to be dying turbos (since they pretty much operate independently and its not Formula 1 quality so the exact same prob couldn't happen to both turbos at exact same time).
So now we're thinking its either:
A: Control flap in the Y-Pipe
B: somewhere in the air intake
C: somewhere in the exhaust (cat converter??) .. and my gf said she could hear really loudly in her car behind, over her exhaust and radio
Anyone experience any noise like this before?
To clarify it sounds just like 'crickets' or 'cicadas' making there noise at night, but a longer drawn out version (instead of 'crick crick circk...")
Or as my mechanic said it sounds very similar to pinging but less violent than pinging.
very bloody frustrating - i'm tempted to get it on a dyno just so I can replicate the sound and listen from the outside to see where the noise is coming from exactly ...
#4
I had the same problem. Turned out one of my turbos was not seated correctly. Happened when I picked up my car after having a new block installed.
Mine sounded like a whistle that would start out low and get higher in pitch when I accelerated.
Hope this helps.
Super77
Mine sounded like a whistle that would start out low and get higher in pitch when I accelerated.
Hope this helps.
Super77
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#14
FD title holder since 94
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Well I took it as a whistling type noise that was mainly under boost. I just had a clamp come off my silicon hose going into the IC. Under boost it would make a fluttering/whistling type noise, worth a shot since we don't really know what the noise his car is making.
Tim
Tim
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