Fuel Pressure jumps 30psi even without vacuum.

A forum for owners and fans of the legendary Nissan Skyline and Nissan GTR.
WILLIAM_SKYLINEGTS-t
Posts: 11
Joined: Wed Sep 11, 2019 6:45 am
Car: 1989 R32 Skyline GTS-t

Post

89’ r32 GTS-t

Aftermarket fuel pump and adjustable fuel pressure regulator.

At idle car puts out around 43psi, under throttle it shoots up to around 65psi. Id does this even if the vacuum isn’t connected. Have no idea if this is normal or not, and what could cause this. Any info about why this happens would help.

Thanks.


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