small Noise (fiiii) starts at 80 km/h and ends at 100km/h, no-noise when de acceletaor pedal off, I do not know the cause, could you help me, the dealer says no major problem is that true?
Is there any vibration similar to driving over a rumble strip at the edge of the road?
1 Like
From the description you provide it could be anything.
But one thing that can cause a noise under different vehicle speeds/engine RPM’s is loose heat shield.
Tester
Alternators can make weird, intermittent noises like that. There may not be anything wrong w/alternator, just what it does. Good idea however to ask your shop to do a basic battery/alternator test, and a look-see at the alternator pulley and belt condition. Make sure the pulley isn’t wobbling and in line (the same plane) with the other pulleys.
A short length of garden hose can sometimes be useful as a sort of stethoscope to narrow down the location of a suspect sound, if it occurs when engine is idling.
@lion9car 's idea above is a good one to also consider.
Or, the OP could “splurge” and buy an automotive stethoscope for $7.99: