double check my fuel pr. setting - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

nissansrdub · 11-14-2011, 04:27 PM

i installed a generic fpr sr20det redtop and it has a little more lag in second gear than the stock fpr had.

the method i used was pulling the green egi pump relay and jumping it. im using a rented fpr gauge brand new from autozone. its installed after the 300zx fuel filter. so when i turned the key on engine off with the relay jumped it sent constant fuel pressure. then i turned it down to what looked to be 43.5-44psi.

no with the jumper wire off and relay plugged in the gauge seems to read 36 psi at idle and when i get on it fuel raises to 44psi. under high boost seems to get up to about 50psi

i believe this is correct but in second gear i seem to have a lag. now that i think about it i didnt even to think to check the boost gauge. ideas???
thanks

jr_ss · 11-14-2011, 05:03 PM

I believe base fuel pressure should be 38psi with vacuum and 43.5 with no vacuum at idle.

11-14-2011, 04:27 PM	#1
nissansrdub Zilvia Junkie Join Date: Apr 2007 Location: Denver Colorado Posts: 500 Trader Rating: (3) Feedback Score: 3 reviews	double check my fuel pr. setting i installed a generic fpr sr20det redtop and it has a little more lag in second gear than the stock fpr had. the method i used was pulling the green egi pump relay and jumping it. im using a rented fpr gauge brand new from autozone. its installed after the 300zx fuel filter. so when i turned the key on engine off with the relay jumped it sent constant fuel pressure. then i turned it down to what looked to be 43.5-44psi. no with the jumper wire off and relay plugged in the gauge seems to read 36 psi at idle and when i get on it fuel raises to 44psi. under high boost seems to get up to about 50psi i believe this is correct but in second gear i seem to have a lag. now that i think about it i didnt even to think to check the boost gauge. ideas??? thanks

11-14-2011, 05:03 PM	#2
jr_ss Post Whore! Join Date: Dec 2005 Location: Pa Posts: 6,413 Trader Rating: (35) Feedback Score: 35 reviews	I believe base fuel pressure should be 38psi with vacuum and 43.5 with no vacuum at idle. __________________ My SR20VET Does your VTC gear rattle in your S14/15 SR? PM me.