fuel pressure

Post by **truepinoy** » Sun Dec 27, 2009 7:56 am

i checked my fuel pressure today and the numbers were surprising. at idle no vacuum it was 45 to 50 psi. at 7psi of boost it went to 60 and at twelve it shot to 70/75psi of fuel pressure. this is a stock ka24e. is it stiil safe to drive/boost while i save up for a new afpr?

Post by **24j0hn** » Sun Dec 27, 2009 5:55 pm

stock pressure is 35-40psi... if your running a ka-t the numbers should still be the same... even at idle those numbers are a little hight...

with those numbers it may be the fuel pressure regulator... just check for kinks in the fuel line first before you buy anything

Post by **martins_240sx** » Sun Dec 27, 2009 7:32 pm

your fpr is not working like it should. it should be 38ish psi at idle and 43ish with vaccuum. your climb sounds about right,you should be fine. if you start having hard startups then this is your culprit. i ran mine like this for a while before i bought a nismo adjustable. if you cant start it pull the vacuum line off and it should start right up.

Post by **truepinoy** » Mon Dec 28, 2009 5:41 am

ill check...should i get the nismo one or some other kind with a gauge?...

Post by **biggie** » Mon Dec 28, 2009 6:00 am

truepinoy wrote:ill check...should i get the nismo one or some other kind with a gauge?...

To keep it simple just a Nismo FPR and an inline gauge (screws into 1/8 NPT port, just buy an adapter for 1/8 NPT and cut fuel line, put it in).

Post by **martins_240sx** » Mon Dec 28, 2009 8:31 am

I got mine through frsport, inline gauge and fpr. these are the parts i got for mine... 134.9526.957.9559.95

Post by **homeslicej2** » Mon Dec 28, 2009 9:23 am

Why not just get the NISMO FPR that fits the KA/SR fuel rails instead of getting the universal one? That would have saved you ~$35 on the adaptors.

Post by **martins_240sx** » Mon Dec 28, 2009 9:38 am

im glad someone asked that question....the answer- It doesnt fit,on the sohc, the adjustment nut will actually hit the head and you wont be able to adjust to where you need it. It will bolt up to the fuel rail but clearence is the issue i had

Post by **biggie** » Mon Dec 28, 2009 9:40 am

homeslicej2 wrote:Why not just get the NISMO FPR that fits the KA/SR fuel rails instead of getting the universal one? That would have saved you ~$35 on the adaptors.

Even the one that says it fits isn't perfect. The adjustment screw usually hits the head. I got a swivel adapter as well so that it all works easily.

Post by **homeslicej2** » Mon Dec 28, 2009 2:06 pm

I knew that the adjustment screw sometimes hits the head, but I was under the impression that if you adjust it to the proper setting that there's Good stuff to know, esp. since I'm getting ready to finally order mine. I'll have to check with the SR guys to make sure that this isn't a problem with our motors. Thanks

Post by **martins_240sx** » Mon Dec 28, 2009 2:21 pm

no it clears perfectly on sr's

Post by **homeslicej2** » Mon Dec 28, 2009 4:06 pm

that's what I thought, but I just wanted to make sure after you two brought it up with the KA's.

Post by **martins_240sx** » Mon Dec 28, 2009 4:12 pm

For the record....it works for both the sr and the ka24de...It does not work for the sohc as a direct bolt on due to clearence between rail and head

Post by **biggie** » Tue Dec 29, 2009 3:35 am

martins_240sx wrote:For the record....it works for both the sr and the ka24de...It does not work for the sohc as a direct bolt on due to clearence between rail and head

Hit the head on my DE, thus the adapter.

Post by **homeslicej2** » Tue Dec 29, 2009 4:22 am

hmm...I'll try to remember to post my results here then. I'm looking to order the parts after the first of the year, maybe have it all installed by early February.

Post by **biggie** » Tue Dec 29, 2009 4:41 am

For reference, mine installed with greddy swivel adapter from Enjuku.

Post by **martins_240sx** » Tue Dec 29, 2009 8:47 am

my bad....let the record show that it only fits the sr with no mods needed

Post by **240sxvaj** » Tue Dec 29, 2009 10:23 am

my car sometimes have a hard time starting up and when it does i will have to gas it. now im thinking its my nismo fpr

Post by **martins_240sx** » Tue Dec 29, 2009 10:51 am

dont tell me that....mine was being a pain in the a$$ to start at the dyno and i also had to give it gas to start. i figured it was tuning. my gauge says it is at proper psi though...do you have an inline gauge?

Post by **240sxvaj** » Tue Dec 29, 2009 6:59 pm

martins_240sx wrote:dont tell me that....mine was being a pain in the a$$ to start at the dyno and i also had to give it gas to start. i figured it was tuning. my gauge says it is at proper psi though...do you have an inline gauge?

well i only have to gas my car to start only sometimes not all the time. my fuel gauge reads at 36psi on idle but then im not too sure when i give it throttle. as of rite now i have a built KADE but not turbocharged and it runs fine, i just hate it sometimes when it wont start til i give it gas. btw, i had my nismo fpr for i think almost 3 years now, maybe less.

Post by **martins_240sx** » Tue Dec 29, 2009 7:03 pm

Yeah i have to give it gas all the time...but that might be cause i removed my iacv and have to crack the butterfly to start...i have only had my fpr on for maybe 3 months....Im putting my iacv back on

fuel pressure

fuel pressure

Re: fuel pressure (truepinoy)

Re: fuel pressure (24j0hn)

Re: fuel pressure (24j0hn)

Re: fuel pressure (truepinoy)

Re: fuel pressure (biggie)

Re: fuel pressure (martins_240sx)

Re: fuel pressure (homeslicej2)

Re: fuel pressure (homeslicej2)

Re: fuel pressure (biggie)

Re: fuel pressure (homeslicej2)

Re: fuel pressure (martins_240sx)

Re: fuel pressure (homeslicej2)

Re: fuel pressure (martins_240sx)

Re: fuel pressure (biggie)

Re: (biggie)

Re: (martins_240sx)

Re: (240sxvaj)

Re: (martins_240sx)

Re: (240sxvaj)

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