06-18-2009, 05:46 PM
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#1 (permalink)
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Base Member
Join Date: Mar 2009
Location: Seattle
Posts: 118
Drives: 09 370Z Blk Sp 7AT
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Quote:
Originally Posted by CCCLXXZ
Just a speculation, but have you considered an exhaust leak from the header or exhaust (cat)? Typically exhaust leaks are rpm dependent and can have a high pitch noise which get louder as a greater volume of exhaust travels through the system. Based on the service manual, nissan has metering equipment for diagnosing unknown sounds from the chassis and related.
It may well be electrically related, but worth considering any other variables regarding rpm dependent issues.
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The input is appreciated, but I'm 99.99% sure it's an electronic noise. The volume doesn't increase or change with RPM. It's completely an on/off problem. Also, I would expect the noise to be loudest outside the vehicle if it had anything to do with the header/exhaust, but instead it's coming from a specific location under the dash where there are plenty of electronic bits.
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