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Strange sound from hard acceleration.

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fineLatio:
When I accelerated hard from 60kph to 120kph I can heard off-pitch "vroom", like crackling sound. RPM is like 4-5K when I hear the sound. If my ICE is on, the sound will be from the speakers, if I off the HU, sound like comes from the front. The strange sound was very loud with my stock car battery, but with my recent battery change, the sound was not that loud. It's not aeroplane sound.

Can expert offer solutions to elmimate the sound?

clarence:
I suspect your engine ECU may need some tuning.

mindman:

--- Quote from: fineLatio on July 20, 2008, 05:38:59 PM ---When I accelerated hard from 60kph to 120kph I can heard off-pitch "vroom", like crackling sound. RPM is like 4-5K when I hear the sound. If my ICE is on, the sound will be from the speakers, if I off the HU, sound like comes from the front. The strange sound was very loud with my stock car battery, but with my recent battery change, the sound was not that loud. It's not aeroplane sound.

Can expert offer solutions to elmimate the sound?


--- End quote ---

try not to accelerate hard. usually rpms is around 3 to 3.5 is sufficient
rem this is auto car and not sport racing car. Our latio engine is 1.5 only
cheers

CustomGolf:

--- Quote from: mindman on July 21, 2008, 11:54:04 AM ---try not to accelerate hard. usually rpms is around 3 to 3.5 is sufficient
rem this is auto car and not sport racing car. Our latio engine is 1.5 only
cheers


--- End quote ---

Like that might as well don't drive the car, park it at home and there is no noise. Engine must rev or not it will get choke up.

clarence:
In such times of expensive fuel, I think if one can well afford the expensive fuel bills, more frequent engine & gearbox oil changes and sooner spare parts change, .there is absolutely no harm to rev or redline your engine frequently.

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