Ok yesterday I put on a ptp fpr mod, and after I did that I drove over to the parts store, went in for 15 min and came out to go home, but right then I was having issues getting the car started. It would crank but would not start. In fact the only way I got it started was a friend came and cleared the pcm for me. Well after that I put on a used stage 3 fuel rail hoping that if the fpr was providing too much fuel and giving me the issues, the rail could regulate it. Still the same issue. Now when I start my car I hear a really loud whining. I thought it was the typical walbro whine coming from my stage 3 fuel pump but it was really loud so I wasn't sure, but it only does it for the 5 min warm up period and then goes away. Also I hear a weird drone or very fine vibration type of sound (hard to describe) but that never goes away even when I drive I can hear it and it almost sounds like it changes its tone in proportion with the rpm's increasing. And when I start the car I have to prime it so I'm thinking maybe my fuel pressure is dropping off, but I have no way to tell. I was wondering if maybe the fpr mod or rail was too much for the s3 pump or fpr and killed one or both of them or if it's something completely different. I've heard the whine sometimes means the pump is gone, but I wasn't sure if that whine stays the whole time you drive or only for a short period (like everytime you start up). And also I don't know what this drone/vibration sound is and if the two sounds are even related. All I know is that the startup issues happened after I put on the fpr mod so when I put the fuel rail on to see if it helped, nothing changed. But later that night (5 hours later) is when I started hearing those noises. I still have the parts on the car. Could it be a bad fuel pump or fpr? What does everyone think? Cliff Notes: put on a fpr mod. Car would crank but not start. Put on a used s3 fuel rail, nothing changed. 5 hours later I start hearing a whine coming from the car duing the 5 min startup period but it goes away when I drive and I also hear a drone/vibration type sound but that doesn't go away. Wondering if my s3 pump is shot or the fpr is shot.
Suggestions I've got were the fpr is busted and pressure is dropping off or the fuel pump is busted from being over worked. Or there is too much fuel being dumped by the high pressure from fpr mod which is why the car didn't start because it was flooded or my plugs are gone (don't think so). Any help is appreciated so I've heard but I am not 100% sure if that's what it is. I don't have the money to go replacing everything otherwise I would so I am trying to get as close to 100% as I can
if it where me I'de...replace the PF, put the S3 rail back on and ditch the PTP PFR..thats just me. Walbro 255 $100.
the PF? Well the only thing is if I ditch the ptp fpr will the s3 rail still work? I thought it needed a higher psi fpr in order to take advantage of it's rising rate capabilities.
So do you have the stock fpr working with the s3 fuel rail or something? Damn, I didn't know it was possible without an fpr mod or a higher pressure fpr (s3 or adjustable aftermarket etc). And about the pump rewire. Is it recommended and where is a good place to get it done? do you know what he did to address the fpr situation? Or did he leave it stock. I pm'd him either way so I'll find out, just wondering if you know ahead of time
I thought the FPR was for those of us who DON'T have a S3/Aftermarket rail....i.e. the FPR + S3 rail = two of the same thing??
I'm just using my stock S3 canister, with a Walbro 255. Nothing else is changed. I'd ditch the PTP FPR and get a new pump. What exactly are you trying to do?
but that stock s3 canister contains the s3 fpr though right? I mean unless you swapped it for the stock fpr for some reason. I am trying to mimic the s3 fuel system because s2 injectors on my setup don't provide me with enough fuel by themselves.
your sig says stock turbo + bolt ons....how in the world are you running out of fuel.......oh I know never mind, your FP is bad, no wonder your running out of fuel. And the S3 FP just replaces the stock unit, in the stock canister.
my fuel pump was working perfectly fine before this fpr mod. I needed fuel because I run a big wheel stock turbo setup, plus all the bolt ons and cams, meth, ported intake and exhaust manifold, tb and most supporting mods I can think of that's not internal to the motor. And ya any FP can replace the stock one in the stock unit. However the canister that comes with the stage 3 kit to my knowledge includes a 75psi fpr. Which is something I need but can't get so I am trying to mimic the setup by using the fpr mod
STS, E1, E2...now correct me if Im wrong, but if you have the S3 fuel rail you have the FPR...that big silver thing in the middle? I know the guy I sold my S2 to added an E2 and has no problems with fuel. What wideband are you running, are you getting knock? Just asking, so we can get this figured out for yeah
If I were you I'd get a return line to do it right. Set it at 53 static or whatever it is on S3 and use a 1:1 rising rate Aeromotive.
Unsure about knock, I use an aem uego. And I think the one in the picture is what allows the rail to regulate it to 58psi and then rise to 75psi based on boost like we all know the s3 rail has those rising rate capabilities. But I'm pretty sure, the canister that comes with the stage 3 kit that physically holds the fuel pump (the big while looking thing) has a 75psi fpr in there so that the rail can get up to 75psi when it needs to do it's rising rate thing, otherwise it would be held to the 58psi that the stock fpr puts out. Unless there is a way for the s3 rail to raise the fuel pressure with the stock fpr, but I don't know if it can or not. Ya I was considering it. It bugs me because I've seen people make this combo work many times, but for some reason I am the first one to come across this issue. So if I can fix my problem and still keep the s3 fuel system, that would be the goal. But if it comes down to it and there's no way out, then I might have the spend the money on a return line setup
just replace the pump. get that piece of junk s3 pump out of there and get a 255 and you should be good to go. and dump that ptp fpr while you're at it, i've never heard of anything but problems with that thing.
