Boost Issues, need help - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

kernel · 10-01-2006, 09:16 AM

When my engine come to boost, it goes VERY LEAN and make backfire like a automatic machine gun...

it happened on the highway when i wanted to snap it to pass someone. i heard a loud pop coming from the front then the car feel like all the power were gone when i come to boost.

i have checked all the coupler, everything is fine. I didnt changed the z32 fuel filter but i have checked it, it look fine. Same thing with the fuel filter in the fuel tank on the pump. The pump has good 12v, it wired on a relay directly to trunk mounted battery. its a walbro 255lph.

for my fuel mangement, i have an safc2 with 740cc & z32 maf. As for the maf, its not defect. I do have a greddy fmic and all the piping, coupler are fine.

i do have too a nismo fpr and the "vacuum" part can spin freely, i dont know if it could be defect and do not hold the pressure good?

The engine running perfectly without running boost...i have EBC with all setting to hold boost at 0 psi and i can run with it, np.

well, id like to know if someone has already got this problem and know where to look to get it fixed.

sry for my bad english and you guys can ask me any question so we can find out my problem, im looking on the board often, thanks.

10-01-2006, 09:16 AM	#1
kernel Zilvia Addict Join Date: Jan 2005 Location: Canada Age: 40 Posts: 934 Trader Rating: (28) Feedback Score: 28 reviews	Boost Issues, need help When my engine come to boost, it goes VERY LEAN and make backfire like a automatic machine gun... it happened on the highway when i wanted to snap it to pass someone. i heard a loud pop coming from the front then the car feel like all the power were gone when i come to boost. i have checked all the coupler, everything is fine. I didnt changed the z32 fuel filter but i have checked it, it look fine. Same thing with the fuel filter in the fuel tank on the pump. The pump has good 12v, it wired on a relay directly to trunk mounted battery. its a walbro 255lph. for my fuel mangement, i have an safc2 with 740cc & z32 maf. As for the maf, its not defect. I do have a greddy fmic and all the piping, coupler are fine. i do have too a nismo fpr and the "vacuum" part can spin freely, i dont know if it could be defect and do not hold the pressure good? The engine running perfectly without running boost...i have EBC with all setting to hold boost at 0 psi and i can run with it, np. well, id like to know if someone has already got this problem and know where to look to get it fixed. sry for my bad english and you guys can ask me any question so we can find out my problem, im looking on the board often, thanks.