F355 idle

Author
Discussion

355spider

Original Poster:

100 posts

34 months

Saturday 7th May 2022
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I have an issue with my F355.

When the cars idling at 1000rpm it sounds absolutely fine, but it has an habit of dropping to around 750 and when it does this it sounds terrible and the engine begins to vibrate, it has a tubi fitted which I guess amplifies the sound issue, I’m assuming 1000 is the sweet spot on these cars, certainly is on mine

One thing I’ve noticed is that it appears to be linked to the fans coming on, as soon as they do the idle drops.

Could this be battery?

Cactussed

5,303 posts

220 months

Wednesday 11th May 2022
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Stating the obvious, definitely electrical.
Alternator could be on the way out? Or a bad earth.