Hard start with new FPR and Greddy Type S question

[CSEclipse]

Well i installed a new fpr and every time i start the car its alot harder start then it used to be is that normal? will it do anything to my car?... im not sure what kind of FPR it is and im not sure how to tune it I played with it alittle, pics are in my gallery. I also have a big boost leak with my BOV the adjustment screw came off when i was driving, its my daily driver and i haven't fixed it yet, i know i need to re-thread it but how long can it go until it will damage my turbo.... I searched and couldnt find any helpful info

 

[Sic95gst]

I don't know about the fuel pressure regulator , but as long as you stay out of boost you should blow your turbo up. If you do boost it your looking at very bad compressor surge. Good luck getting it straight.

 

[L2RTSiAWD]

im not sure what kind of FPR it is and im not sure how to tune it I

That is bad. You need to know what your base fuel pressure is. It's probably to low which is why it's hard starting.

 

[karbon]

I see you have a fuel pressure gauge on your FPR. You've got me as to what kind it is. Anyway, without starting an argument I'm going to have to say make sure the base pressure is at least 35, but not much more. I know a few of the guys on the boards here run up to 43 and up base pressure. I've never needed that much. You tune the base pressure by taking the locknut off of the allen bolt on the "top" of the FPR, then adjust it where it needs to be, and screw the locknut back down so it doesn't move. I see you're in Akron. I live in North Canton, so if you need to borrow a BOV in the meantime ( if you think it's going to take awhile to get that screw back in), I've got a spare. It's a 1g so you'll be able to recirc, only problem will be the flange if your greddy's is welded on.

 

[L2RTSiAWD]

Anyway, without starting an argument I'm going to have to say make sure the base pressure is at least 35, but not much more. I know a few of the guys on the boards here run up to 43 and up base pressure.

1G=37psi
2G=43psi

These are the stock pressures with the vacumm line removed. If you set it at 35 your just going to have to add fuel via AFC or something.

 

[Green93TalonTSi]

Base FP for a 2g Turbo is 43psi, thats what I would set it to. I looked at your gallery, and your not suppost to leave the stock FPR connected. That Vac. port on your FPR needs to go to your intake mani. You should have your Boost gauge and FPR "T" off that line. Thats more than likely why your car won start.


So take the Vac. line off your stock FPR and connect that to your intake mani. then try and start it from there. Also set your base fuel psi @ 43psi. You can do that by taking the vac line off the FPR and and undoing the lock nut and turning the bolt up/down to increse Fuel psi.

 

[captd108]

same thing happened to me with the bov and pretty much what i did is i found a screw with a little bit bigger threads and have that in its place. so far no problems at all and it seems to stay in place nice and tight. i lost my adjustment screw while driving so i had no other choice pretty much. as far as the fpr goes, just set it at 43psi and i really dont know why you would need to remove that vacuum line since thats the one that goes to the stock fpr and theres another line that goes to the manifold. Thats how i have it on mine atleast. Good luck.

 

[Green93TalonTSi]

ok, If you look in his gallery, you'll see that he has the Vac. line from the stock FPR to his new AFPR. YOu arent suppost to run them in conjuntion. SO that is why u take the hose off the stock fpr.

 

[karbon]

I'm going to have to intervene and maybe save face after my last post confusing fuel pressures. His vacuum source for the FPR isn't hooked into the stocker, it's hooked into the fuel pressure solenoid. What they're saying is stick a T in yout BOV vacuum hose and run a vacuum hose from the T to the nipple on the FPR. Unplug it from the fuel pressure solenoid, it never needs plugged back in. Just make sure you keep the wiring hooked up so the ECU can verify that the solenoid works.

 

[Green93TalonTSi]

DOnt have to stick a "T" in teh BOV line. Just the line that your FPR Solenoid is on. 1 end of the hose goes onto the intake mani in its original spot, then put a "T" on that line and from the "T" 1 line goes to the AFPR and 1 to the Boost gauge.

 

[karbon]

Gah I didn't mean the BOV vacuum line, I meant for the boost gauge. I wasn't thinking

 

[captd108]

i dont know for some reason i still dont see anything wrong with the vacuum line he is using for the top nipple on the fpr. That is the line that was used on the stock fpr so why wouldnt it be used for the aftermarket one. That line has nothing to do with the intake mani or the boost gauge. Those are sperate from the fpr i beleive.

 

[Green93TalonTSi]

Take the hose off the stock FPR , the stock FPR is not needed any more, there is no need for the hose to be on it. Its not controlling your FP anymore, the AFPR is. So you take the hose off the stock 1 and you hook the new AFPR up to that hose.

 

[captd108]

he doesnt have the stock fpr on there though. That line is attached directly to the fuel rail. The stock fpr is no where in the engine bay. It seems as that peice on the fuel rail is like an adapter he used so he can attach the line from the afpr to the fuel rail.

 

[Green93TalonTSi]

im not talkin bout the fuel line. Im talkin bout teh Vac. line. The one we have been talkin about since the begining of this thread ! So you mean to tell me that his stock FPR is no where in the engine and isnt hooked up to the AFPR ?! I suggest you look again.

 

[captd108]

to be honest with you man and im not like trying to get into an argument about this but i dont see his stock fpr anywhere in there. And ive looked at numerous other fpr setups and hes got the vaccuum line coming from the right place and going into the right place.

 

[Green93TalonTSi]

Neither am I. I jsut want to make sure that the CORRECT info is posted. In fact the stock FPR is in the pic, on the right hand side on the fire wall. if you trace teh vac line. it goes towards the firewall , not to the intake mani where its suppost to go.

 

[captd108]

unless youre talking about the fuel pressure solenoid.

 

[Green93TalonTSi]

Yea, sorry forgot to type in the "solenoid"

 

[captd108]

ok well yeah it is going back to the fuel pressure solenoid, but leaving it on the fpr solenoid is not a problem. Actually in cold weather it does help on startups according to taboospeedshop, who talk about the removal of this line. So pretty much in the end either way he has it would work.

 

[Green93TalonTSi]

I've never had any problems with start up. And actually had a friend who left it on there, and it kept bumping his fuel pressure back to stock. Thats why you take the hose off the fpr solenoid, so the fuel psi doesnt go back to stock ,if u have changed it.

 

[CSEclipse]

2 days after the adjustment screw came off i found it off the side of the road in front of my apartment building go figure... well i fixed my bov and just got a size bigger screw and now it works fine... well the fuel rail feed started to leak so i checked it and its cracked so i ordered a new feed from buschur racing, when it comes it im hoping my car runs fine until i get my afc next week... thanks for all the info