How sensitive is the Ferrari Testarossa's gas pedal supposed to be?

What engine family TR do you have? F113A (sometimes called F113A000) or something else (the engine family is marked on the engine block above cyl #6)?

For anything other than F113A engine TRs, I would say "somewhat sensitive". The TR ignition system on non-F113A engine TR is designed with a switch on the throttle shaft that closes in the idle position to "tell" the Microplex ignition ECU to retard the ignition timing by ~5 deg. Consequently, when you open the throttle from idle you get the affect of more air plus the affect of the ignition timing advancing ~5 deg in an instant step (which also increases the RPM). IME, another factor that can have a huge affect in your ability to control the acc. pedal motion (i.e., open it just a little from idle) is how well lubricated/smooth the acc. cable is -- it has a terrible ~90 deg bend at the bottom front of the engine. It's very difficult to lubricate it from the engine end (which is where it should be done from) when the engine is in place so definitely something to ask your Mechanic to do at every major service when the engine is out. You can try lubricating it from the pedal end, but this is not as ideal (but did help mine a lot). Also, the many ball and socket joints in the throttle plate mechanism need periodic cleaning/relubrication.

 

What Steve said. Also, if you have aftermarket floor mats they sneak up and put pressure on the throttle pedal. I have regularly experienced a condition where the carpet pressure plus just a small amount of foot pressure combine to have a much larger than wanted pedal movement. Very annoying. And you get to feel kind of stupid when it happens in a bunch of traffic.

 

I can’t agree more on that! Those floor mats kept putting pressure on my gas pedal and when I was switching gears I thought the car kept revving leading me briefly to believe I had an issue. Needless to say I remove them and issues are gone)


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No, you have a F113A040 TR engine which is a US version (and not a F113A TR engine) so you have what I've called a non-F113A TR engine and is as "sensitive" as it gets.

The *00317* is the engine serial number (which matches well with being a 1986 US TR).

 

The engine in my US spec '86 was probably on the line with yours based on the serial number, but can't say the throttle has ever felt overly sensitive. I've owned it several years and have put thousands of miles on it. I wonder if it is an engine timing issue with yours.

 

It should feel like any other throttle pedal.

Your linkage may need a good clean and lube..perhaps one of the linkage Ball links are too tight..or you have a sticky throttle cable..or it's incorrectly routed.

Not a difficult issue to over come..and deffinatly not expensive.

 

your countach is a carb or injected car? there is a big difference

 

yes, both, but not just behind. about 1 year between
as I remember the injected is much better to handle with the gaspedal than the carb. so in traffic I prefer the injected, but on the country the carbs because of the sound and the engine revs a little higher
the TR is medium between the carb and the injected

 

Sticky linkage parts was a problem for me before I cleaned and lubed them with Teflon grease. Made a noticeable difference. I still hate stop starting on an incline, but the issue is one of my clutch control, not the engine.

Countach Weber DCOEs run sweetly at low rpm when the carbs are clean and well adjusted. My LP400S is actually easier to manage in traffic than my TR.