sr sputters around 2500rpms, more throttle it runs fine - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

sofo259 · 03-20-2008, 03:19 PM

since i got my car running last week, i havent really drove it until a few days ago, and i noticed while pulling through a shopping center around 2500rpms my car likes to sputter like it has a misfire..

any where above that, when i am accelerating it is fine, if im trying to go a steady speed, it sputters..

i am still running on the stock DOHC fuel pump (for now) an SR maf, and the engine is all stock..

i swapped out my MAF with a friends sr MAF, and it was still sputtering, swapped ECU, and it still sputtered..

we have narrowed it down to a fuel problem so far, but has anyone else had this problem ??

i am ordering my walbro, and a FPR tomorrow so hopefully that will fix the problem. Because i'm thinking that my stock pump isnt pumping enough fuel at a steady pace to keep it going but at higher RPMs its just fine..

fckin weird !!!

180sx_Drifter · 03-20-2008, 03:21 PM

sounds like you need to install the walbro. i had that problem and swapped the fuel pump and that solved everything. swap out the fuel pump and see if it still does it.

S14monkey · 03-20-2008, 03:25 PM

Might also want to check your coil packs. I had a coil pack that was going bad. My car would idle normally, but when I accelerated, my car would sputter like how you described. Get a fresh coil pack and swap it out one by one. See if that helps any.

*Actually, I should have read your post more closely. My car would sputter around 2500rpm, but it would continue to sputter all the way up the range. So maybe it is the pump.

dnbwithweed · 03-20-2008, 03:42 PM

hmmm that happened to me but my tps was causing the problem. just throwin it out there.

sr20det drift · 03-20-2008, 03:54 PM

yeah i would check into the tps or fuel pump

sofo259 · 03-20-2008, 08:52 PM

well i just replaced my TPS, with a new one because my sr is an auto motor, so i had to go to a manual TPS..

03-20-2008, 03:19 PM	#1
sofo259 Leaky Injector Join Date: Apr 2007 Location: georgia Posts: 95 Trader Rating: (0) Feedback Score: 0 reviews	sr sputters around 2500rpms, more throttle it runs fine since i got my car running last week, i havent really drove it until a few days ago, and i noticed while pulling through a shopping center around 2500rpms my car likes to sputter like it has a misfire.. any where above that, when i am accelerating it is fine, if im trying to go a steady speed, it sputters.. i am still running on the stock DOHC fuel pump (for now) an SR maf, and the engine is all stock.. i swapped out my MAF with a friends sr MAF, and it was still sputtering, swapped ECU, and it still sputtered.. we have narrowed it down to a fuel problem so far, but has anyone else had this problem ?? i am ordering my walbro, and a FPR tomorrow so hopefully that will fix the problem. Because i'm thinking that my stock pump isnt pumping enough fuel at a steady pace to keep it going but at higher RPMs its just fine.. fckin weird !!!

03-20-2008, 03:21 PM	#2
180sx_Drifter Zilvia Junkie Join Date: Jan 2008 Location: SoCal Posts: 557 Trader Rating: (1) Rides Gallery: 180sx_Drifter Feedback Score: 1 reviews	sounds like you need to install the walbro. i had that problem and swapped the fuel pump and that solved everything. swap out the fuel pump and see if it still does it. __________________

03-20-2008, 03:42 PM	#4
dnbwithweed Zilvia Junkie Join Date: Jan 2004 Location: gardena Posts: 407 Trader Rating: (3) Feedback Score: 3 reviews	hmmm that happened to me but my tps was causing the problem. just throwin it out there. __________________ I would drag race too, If i didnt know how to drift. ok, so i dont!

03-20-2008, 03:25 PM	#3
S14monkey Join Date: May 2005 Location: California Posts: 30 Trader Rating: (0) Feedback Score: 0 reviews	Might also want to check your coil packs. I had a coil pack that was going bad. My car would idle normally, but when I accelerated, my car would sputter like how you described. Get a fresh coil pack and swap it out one by one. See if that helps any. *Actually, I should have read your post more closely. My car would sputter around 2500rpm, but it would continue to sputter all the way up the range. So maybe it is the pump.

03-20-2008, 03:54 PM	#5
sr20det drift Leaky Injector Join Date: Feb 2008 Location: chi Posts: 112 Trader Rating: (0) Feedback Score: 0 reviews	yeah i would check into the tps or fuel pump

03-20-2008, 08:52 PM	#6
sofo259 Leaky Injector Join Date: Apr 2007 Location: georgia Posts: 95 Trader Rating: (0) Feedback Score: 0 reviews	well i just replaced my TPS, with a new one because my sr is an auto motor, so i had to go to a manual TPS..