S14 SR20 problems under boost - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

ApexRK · 05-08-2007, 10:07 AM

Car is a 97 Kouki with a zenki S14 SR20, only mods are walbro pump, fmic and turboback exhaust.
When getting into the boost the car almost bucks a bit and feels very irractic on power, once its at full boost 8-10psi I am getting what feels like the timing being pulled and then advancing giving that on/off feeling. Then sometimes it just doesn't want to go under WOT just bogs on the power.
I did have a big boost leak, but its fixed and still the problem is there. I don't have any logging software to monitor anything so I'm at a loss as to what it could be, any ideas?

Yes I did search, but nothing answered by question.

05-08-2007, 10:07 AM	#1
ApexRK Leaky Injector Join Date: Feb 2007 Location: Kingston, ont Age: 44 Posts: 79 Trader Rating: (0) Feedback Score: 0 reviews	S14 SR20 problems under boost Car is a 97 Kouki with a zenki S14 SR20, only mods are walbro pump, fmic and turboback exhaust. When getting into the boost the car almost bucks a bit and feels very irractic on power, once its at full boost 8-10psi I am getting what feels like the timing being pulled and then advancing giving that on/off feeling. Then sometimes it just doesn't want to go under WOT just bogs on the power. I did have a big boost leak, but its fixed and still the problem is there. I don't have any logging software to monitor anything so I'm at a loss as to what it could be, any ideas? Yes I did search, but nothing answered by question.