1. Yes 2. Yes 3. Yes I also installed an anti-theft device at one stage and found that the standby power to the ECU was being lost when the transponder was out of range and this was causing the same symptoms upon every start up. So how do you reckon the ECU might be losing it's memory?
An ECU can lose potential via degradation of either the battery supply voltage or the ground circuit. The degradation can occur either internal or external to the ECU. If the problem is external to the ECU, it's fairly simple to diagnose. If you like, I can provide some simple diagnostic suggestions. To perform the diagnostics, you will need the ECU pinouts for both left and right ECU connectors; let me know if you can't find the pinouts. The ECU specification for the 360 is found in section C 1.01 of the Ferrari Workshop Manual. BTW: Is your car exposed to salt air on a regular basis?
QUOTE=FerrariDublin;143243690]1. Yes 2. Yes 3. Yes... Is this your Meg Ryan imitation? ...So how do you reckon the ECU might be losing its memory?[/quote] Several hints. For instance: The OP states that he left the battery disconnected overnight, and upon restart, the engine exhibited the same behavior (running poorly upon start-up) as when the battery was left connected. I believe that the injectors are going into "learn mode," in either case
Hi Kim, I have forgotten about this post!! Anyway, since then I have installed new battery and the half firing on x4 cylinder seems to occur less. It occurs typically when the car hasn't been started for a while. With new battery, it goes onto x8 cylinders pretty quick at cold start.. Don't seems to be bothered with it now..I just treat it as 'normal' now
I had this happen once, I researched of FCHAT and somewhere someone said to wait a few seconds after the “check ok” goes out. I now count at least 5 seconds after it goes out and I never had it again. Might be worth a try.
