Re: 954rr hard restarts
The vac line that runs from the fpr to the throttle bodies is that, a vac line, not just a drain line. In the standard fpr test, you pull the vac line, tun the ignition on, listen for fuel pump prime and watch for leak.
But when you cycle the ignition key, it's only putting pressure on the fpr, it's not applying the vacuum that the (failing) diaphram gets when the bike is running. That's why a bad fpr doesn't always leak just from the standard test.
What I mean by raspy is whether cold or warm you get stalling, hard restarts, acts like flooding, runs fat, smell gas, Idle won't stabilize, etc. You may notice all or just some of those things depending on how bad a fpr's diaphragm is leaking
Last edited by jondog9; 10-28-2016 at 8:09 PM.