Technical Weird discharge sound 2013 Abarth

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Technical Weird discharge sound 2013 Abarth

Mathias1977

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Jan 20, 2020
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Hi Abarth friends,

I am trying to figure out why my Fiat 500 Abarth is making such an odd sound. This is my second one and my previous 500 did not make this noise when releasing the gas pedal after accelerating.ehat can this noise be? The actuator failing perhaps? The turbo pushes strong (although I do feel a "dip" around the 3,000 rpm mark).

I'm also curious to know why the actuator rod doesn't seem to be moving on this video as I'm releasing the gas pedal. Does the engine need to be under load in order for the actuator to actually do its job? I would have thought that he would have worked even if I would accelerate and release the gas pedal while static.

Video here: youtu.be/JMo65VhJyVA

Any help is appreciated!!

Thank you,
Mathias
 
I think the wastegate actuator isn't moving.

Check the vacuum hose to it, I believe it's common for them to split on the elbow (you can see the elbow to the actuator on you vid, it has a couple of rusty clips on it).

If the vacuum hose is ok you could also try operating the actuator with a hand held vacuum pump like a Mityvac, see if it works.
 
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