Well done on your perseverance Jeff. That pressure always looked high but you went the extra mile and through dogged determination you found the cause. Excellent bit of work. Hope all remains well and I look forward to your slightly-longer-term report in a little while. Greg.
Thank you FerrariDublin, you encouraged me to keep this alive at FerrariChat and it paid off. I really can't believe how elated I feel about finding this. I've made some great bug discoveries as a software developer, but currently if feels like this one tops them all. I took it for another spin tonight while monitoring the OBD. Short term wasn't getting out of range, I punched it a few times all seems ok. LTFT is working it's way back toward the 0 range. I'll will post longer term follow up. Also, I started with 9 codes and these where the last two so it makes it all the more exciting.
Outstanding. It's kind of amazing, when you think about what you were able to find. It's the equivalent puzzle that you would have, if someone took your car, and then handing it back to you saying "Ok, now I've hidden a new part somewhere in one of the 20,000 systems in your car, which doesn't belong, and you have to find it".
F355's running great. No noticable changes other than it doesn't load up at idle like it used to. I've run it through all RPM ranges, 250 miles. After I put the steel wool in the rear o2 spacer, I don't even have any more codes to work on! My conclusion: The 2 new FPR's I installed for $360 (ferrari price $2100) fixed the problem that the PO chose to fix with fuel return line restrictor for $.05. Thanks all for the help!
Thanks for posting the final verdict and congratulations on solving the problem yourself! I have seen flow restriction "pills" in wastegate hoses on turbo cars to increase the maximum boost, but never on a fuel line. Learned something new from this.
+1 Great to hear she's running well. What will you do with your spare time now with no problem to work on? Enjoy!
