Not a 370z, but... VQ35HR ST (VSR) Begins

mad_jelly

Got the new line! Thanks Phunk! The existing male AN fitting is too short for the new line. regardless, reattached the old line. Car still makes 0 pressure when I provide the pump power. Turning over the car still takes 3 or 4 tries with some gas.

Car no longer stumbles when it goes from vacuum into boost but does go way lean as the boost pressure increases. Car is waiting to lean out and go BOOM.

Once the car idles, the fuel pressure registers 45psi. Don't know if it goes up or down when the car goes into boost. Revving the motor in the driveway doesn't put the car into boost. Any tips on motoring the pressure gauge in the engine bay while driving???

phunk

That doesnt make sense, the length specs on all that stuff never changed... the hose should have been cut to 7.5". Did I cut it too short?

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phunk

If that hose coming off was the reason for the issues, than putting back on alone wouldnt solve the problem. All that hose does is allow the module to siphon fuel from the drivers side. But the siphon needs return fuel pressure to work... so if starvation made it stop running, it would need fuel added to run again even after the hose was connected in order to build pressure and activate the siphon.

That said, if the car is running and making pressure now, its something else anyway. Its most likely a bad pressure regulator or an internal pressure leak in the fuel pump module (missing oring on regulator delete fitting, cracked housing, bad seal between pump output barb and filter housing inlet), or a bad fuel pump.

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