Join Date: Apr 2010
Ferrari Life Posts: 2,189
Seems to be a common problem with 550's.
Not only check your TPS, but have a look at the actual butterflies in the throttle bodies. Mine were only opening perhaps 75%, so as Fabio indicated, the pedal travel needs adjusting. I've seen/heard this from several other 550 owners also.
Don't know if the same is happening with 456's and the F355's but it wouldn't hurt to check.
Arguably, the engine may not need that extra TB opening to pass the required air, but the added restriction of a 75% open vs 100% open TB isn't going to help the power output.
'99 550, Rosso Corsa / Nero, S/N:114654, Assy: 31836, Engine: 52084
High mileage, low compression, and missing on a few cylinders.....just like my cars.
Maranello Skunkworks Team Member