Sr20det no fuel pressure after fpr - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

josheh94 · 06-05-2013, 02:39 PM

hi guys any help would be greatly appreciated, I did my first sr20 rebuild and I am getting almost no fuel pressure after fpr, about 1 to 2 psi, I am getting above 60psi going into the fuel rail, so I think there is a problem in the between the fuel rail and the fpr. I have tried to switch to stock fpr and still the same as the nismo and have tried a different fuel rail. tried googleing for hours and am getting extermly frustrated and just want to get my car running again, so any help would be greatly aprrectiated

*fliprayzin240sx* · 06-05-2013, 03:24 PM

The FPR is what controls your pressure. You measure your fuel pressure before the fuel rail and fpr. You see minimal pressure on the other side of the fpr since its just the return line back to the tank.

But if you're seeing 60 psi before the rail, you need to crank that down to 40-42 psi static (meaning disconnect the vacuum line to it while you adjust it down).

nickauger · 06-05-2013, 03:37 PM

Are you sure you have not mismatched fuel pressure/fuel return line ... ?

jr_ss · 06-05-2013, 03:39 PM

Just as Flip said, you shouldn't have pressure after the regulator, only volume.

josheh94 · 06-05-2013, 06:31 PM

thank you so much for the fast reply guys, you saved me a couple of days of bashing my head up against the wall, flip was totally right

Mikester · 06-06-2013, 06:32 AM

Quote:

Originally Posted by josheh94

thank you so much for the fast reply guys, you saved me a couple of days of bashing my head up against the wall, flip was totally right

^^Yea he's good like that once in a while

06-05-2013, 02:39 PM	#1
josheh94 Join Date: Oct 2012 Location: calgary Age: 27 Posts: 2 Trader Rating: (0) Feedback Score: 0 reviews	Sr20det no fuel pressure after fpr hi guys any help would be greatly appreciated, I did my first sr20 rebuild and I am getting almost no fuel pressure after fpr, about 1 to 2 psi, I am getting above 60psi going into the fuel rail, so I think there is a problem in the between the fuel rail and the fpr. I have tried to switch to stock fpr and still the same as the nismo and have tried a different fuel rail. tried googleing for hours and am getting extermly frustrated and just want to get my car running again, so any help would be greatly aprrectiated

06-05-2013, 03:24 PM	#2
fliprayzin240sx Man w/ CTSV & a Car Seat Join Date: Aug 2002 Location: Tampa Posts: 17,998 Trader Rating: (19) Rides Gallery: fliprayzin240sx Feedback Score: 19 reviews	The FPR is what controls your pressure. You measure your fuel pressure before the fuel rail and fpr. You see minimal pressure on the other side of the fpr since its just the return line back to the tank. But if you're seeing 60 psi before the rail, you need to crank that down to 40-42 psi static (meaning disconnect the vacuum line to it while you adjust it down). __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

06-05-2013, 03:39 PM	#4
jr_ss Post Whore! Join Date: Dec 2005 Location: Pa Posts: 6,056 Trader Rating: (34) Feedback Score: 34 reviews	Just as Flip said, you shouldn't have pressure after the regulator, only volume. __________________ My SR20VET

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06-05-2013, 03:37 PM	#3
nickauger Leaky Injector Join Date: Sep 2008 Location: Quebec city Posts: 121 Trader Rating: (2) Feedback Score: 2 reviews	Are you sure you have not mismatched fuel pressure/fuel return line ... ?

06-05-2013, 06:31 PM	#5
josheh94 Join Date: Oct 2012 Location: calgary Age: 27 Posts: 2 Trader Rating: (0) Feedback Score: 0 reviews	thank you so much for the fast reply guys, you saved me a couple of days of bashing my head up against the wall, flip was totally right