Fuel pump noise FTL! Any ideas to shut it up?
03-30-12, 02:44 PM
#1
Fuel pump noise FTL! Any ideas to shut it up?
I recently swapped my Walbro out for a Denso pump. The Denso is much quieter than the Walbro, but I can still hear it and it is annoying in a different way 
The Walbro was a loud, obnoxious wine. The Denso is a subtle, yet also annoying, high pitched whine. I liken it to a dog whistle or the sound a CRT emits when it is powered on. At any rate, do you suppose some high end sound deadening or something draped behind the back seat would fix this? Or, will the stock SC300 fuel pump ECU control a TT pump? Maybe because I am 12v modded it is just over-driving the pump 24-7 which I imagine makes it a lot worse.
Any other ideas? I am going crazy with all this racket!
The Walbro was a loud, obnoxious wine. The Denso is a subtle, yet also annoying, high pitched whine. I liken it to a dog whistle or the sound a CRT emits when it is powered on. At any rate, do you suppose some high end sound deadening or something draped behind the back seat would fix this? Or, will the stock SC300 fuel pump ECU control a TT pump? Maybe because I am 12v modded it is just over-driving the pump 24-7 which I imagine makes it a lot worse.Any other ideas? I am going crazy with all this racket!
03-30-12, 03:26 PM
#2
1JZ Single SC400
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I noticed my TT was also louder than stock also. When you say you 12 volt modded it, means ran a seperate power source form battery, or just tied the two wires in the driver side rear panel together? I ran a seperate relay and a 12 volt source from battery, grounded by the AEM.
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03-31-12, 08:19 AM
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Lexus Test Driver
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This ^ LOL!
Seriously, I can't answer that one. I don't see any reason why not. All it's doing is dropping the voltage based on RPM/load. That voltage drop quiets/slows down the pump at idle.
If you bypass a stock sc300's fuel pump ecu, at idle it's loud (not WB loud, but loud enough).
Seriously, I can't answer that one. I don't see any reason why not. All it's doing is dropping the voltage based on RPM/load. That voltage drop quiets/slows down the pump at idle.
If you bypass a stock sc300's fuel pump ecu, at idle it's loud (not WB loud, but loud enough).
03-31-12, 04:53 PM
#12
Well dang. I reversed the 12v mod and car wont start. I had to un-reverse it so the car would run and I could drive home 
Oh well. I am still planning to fix the FPC. I suspect I left the signal wire off or something else happened in the wiring because I got NOTHING on the signal pin when I cycled the key. I am going to trace it all out and make it work because I hear the Aristo ECU will for sure control the SC FPC. I'll keep this thread updated with my results.
Oh well. I am still planning to fix the FPC. I suspect I left the signal wire off or something else happened in the wiring because I got NOTHING on the signal pin when I cycled the key. I am going to trace it all out and make it work because I hear the Aristo ECU will for sure control the SC FPC. I'll keep this thread updated with my results.
