tag:blogger.com,1999:blog-9026458778495935571.post4870018975260523901..comments2024-03-26T22:57:17.676+09:00Comments on One Man's Lonely Adventures In His R33 Skyline GT-R: What's This Weird Sound??Akihttp://www.blogger.com/profile/13586596582322556131noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-9026458778495935571.post-23651258225962107312022-07-07T12:09:40.825+09:002022-07-07T12:09:40.825+09:00Awesome! Thank you very much for the through analy...Awesome! Thank you very much for the through analysis and suggestions! Will see what I can do...<br /><br />AkiAkihttps://www.blogger.com/profile/13586596582322556131noreply@blogger.comtag:blogger.com,1999:blog-9026458778495935571.post-90161145545625908892022-07-07T08:04:07.643+09:002022-07-07T08:04:07.643+09:00I have no personal experience with the Tomei FPR, ...I have no personal experience with the Tomei FPR, it's possible that because it is not designed for emissions that it has a significant bleed-down if the pump isn't running. Other adjustable FPRs I've used tend to lose fuel pressure pretty quickly after the pump turns off, I had to set the ECU to run the fuel pump prime as soon as the ignition is on to have less issues with fuel pressure at start. You can try testing the FPR for leaks and repairing it if any obvious ones are found. If you've tried everything maybe the Nismo adjustable regulator will be less likely to bleed pressure after shutdown? To me it looks identical to the OEM regulator, only difference being that the OEM regulator has a fixed spring preload while the Nismo part you can turn the screw to adjust the preload. The downside of that setup is it requires something that resembles the factory fuel rail and it has very little capacity to bypass so if your pump flow rate is not carefully controlled to avoid overwhelming the FPR you will have excessive fuel pressure.Anonymousnoreply@blogger.com