I just got a RB downpipe and silencer and decided to remove the emission stuff. Since my motor was already out, I felt this would be the best time to remove it. I'm at the rats nest and debating wether I should keep the FPR solenoid. It's suppose to help on hot-start and I live in Florida. So are there any cons on removing this?

 

None at all. The thing allows MORE or HIGHER fuel pressure during HOT starts. I think this is a step backwards myself.

99.9 percent of the time the solenoid allows a path for vacuum to the fpr. So just route a vacuum line directly to the fpr from its source of vacuum.

 

I'm sure the system works very well on a fresh motor, but on a weak engine the extra fuel pressure may make flooding problems worse. So it depends entirely on the condiction of your engine. It's not exactly difficult to put back on, so if you remove it and find the engine runs very badly immediately after hot starts, or is hard to start hot, then put of back on. If this makes the problem worse then remove it; if it makes the problem better then keep it. Do what works best for your car, not just what someone tells you thinks works for them (not refering to you Hailers).

 

Alright, thanks guys! I guess I'll try it without it first and if I get any issues from it, I'll put it back on.

 

Just a note: with it in place and working during a hot start, the engine will idle just a touch higher for about fifty or so seconds and then return to a more normal idle. Higher being about 100 rpm or so higher.

 

The increased idle speed comes from the ASV opening at the same time, not the extra fuel pressure (which would probably have the opposite effect). If the ECU triggers the hot-start assist, the idle speed will still increase slightly even if the FPR solenoid is not in place.