Rapid Fuel Pressure Leak Down, 33 psi maintained (video)

Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting.
User avatar
emiliog2276
Posts: 267
Joined: Fri Feb 01, 2008 1:02 am
Car: 1990 300zx 2+2 NA
2002 Nissan Sentra GXE

Post

I tested my fuel pressure today. When i set the key to the On position the psi jumps to forty then rapidly goes down. Fuel pressure does go up when the pressure regulator is disconnected. PSI does hold at about 33psi when the car is running followed again by a rapid decrease when the car is shut off. The car doesnt run that bad aside from crappy mpg. From other posting ive read this isnt normal. What could be causing this? Is there a call for a new fuel pump? Thanks.

[youtube]http://www.youtube.com/watch?v=uWwBw0L-pho[/youtube]


Return to “300ZX (Z32) Technical”