Originally Posted by David @ FluentInFerrari View Post
Please clarify the problem:
Is the car hard to turn over (e.g. the starter turns slowly) when hot, or...
Is the car hard to start when hot?
Thanks for responding. Here's the history and fix attempts so far.
It first started after hard track sessions. Now, it just seems to be related to any rides over 20-30 mins, and seems to be heat related. When attempting to restart a hot engine (after sitting longer than a minute, as it will restart immediately after stopping), you can hear the solenoid attempt to engage (click), but the car won't crank and start until it cools off, which usually takes 30 mins.
1. Replaced starter... no change.
2. Since I had this problem with a 348 and TR as well, the fix was adding a Bosch WR1 hot start kit, which consists of a relay and a wire harness, wired near the starter. It worked on those cars like a charm. However, on the CS, after it was wired in it seemed to bypass the 'start button'. In other words, when the key is turned to the 'on' position, the starter begins cranking and doesn't stop, which isn't a solution and was removed.
3. Since the battery was almost 5 years old, it was suggested to replace it. I replaced it and also checked the charging system, other possible drains, etc. There were no other problems other than a slightly weak battery. New battery... no change
Voltage at the starter was 12.8 and 10.8 at the small wire when cranking. These were made with the engine cold, with the old battery. Car started with these numbers when cold.
I've spoken with a couple of Ferrari techs that I am friendly with and they are stumped. They all said that they had never seen a 360 or CS with this issue. At this point, I am puzzled as well.
Thanks again for your input.