Sputtering At Boost - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

FourWeeks · 04-10-2014, 08:09 PM

Hi, just recently bought a S13 coupe with a blacktop SR20DET. Internals are all stock AFAIK, Walbro 255, stock turbo, recirc bov, ISIS 3" blast pipes with 3" test pipe.

The other day after having filled up my gas tank, I decided to drift around in a parking lot. After I was all done I decided to do a little pull and realized that as soon as I started to build boost around 3500rpm-4000 my motor felt like it was hitting fuel cut and attempting to build back up, kinda like what it feels like when you try to accelerate from a standstill in a high gear. The car won't sputter as bad if I ease into boost but if I go into it at WOT I feel like I'm bogging. Also, idle is a bit sporadic as in sometimes when I approach a stop, RPMs will dip down to 300rpm or lower but will go back up immediately.

I checked and my plugs and coil pack #3 have white residue on them which leads me to believe I'm experiencing lean conditions, so maybe a fuel delivery issue? I've since changed out the plugs and cleaned the coil pack and will be checking my fuel filter. In the meantime, does anyone have any insight? Car will not always start first key turn, but I blame it on the shrunken battery and cold weather. I can definitely hear the fuel pump priming though.

04-10-2014, 08:09 PM	#1
FourWeeks Leaky Injector Join Date: Mar 2014 Location: AK Age: 33 Posts: 57 Trader Rating: (1) Feedback Score: 1 reviews	Sputtering At Boost Hi, just recently bought a S13 coupe with a blacktop SR20DET. Internals are all stock AFAIK, Walbro 255, stock turbo, recirc bov, ISIS 3" blast pipes with 3" test pipe. The other day after having filled up my gas tank, I decided to drift around in a parking lot. After I was all done I decided to do a little pull and realized that as soon as I started to build boost around 3500rpm-4000 my motor felt like it was hitting fuel cut and attempting to build back up, kinda like what it feels like when you try to accelerate from a standstill in a high gear. The car won't sputter as bad if I ease into boost but if I go into it at WOT I feel like I'm bogging. Also, idle is a bit sporadic as in sometimes when I approach a stop, RPMs will dip down to 300rpm or lower but will go back up immediately. I checked and my plugs and coil pack #3 have white residue on them which leads me to believe I'm experiencing lean conditions, so maybe a fuel delivery issue? I've since changed out the plugs and cleaned the coil pack and will be checking my fuel filter. In the meantime, does anyone have any insight? Car will not always start first key turn, but I blame it on the shrunken battery and cold weather. I can definitely hear the fuel pump priming though.