Nissan 240SX Forums banner
1 - 6 of 6 Posts

·
Registered
Joined
·
3 Posts
Discussion Starter · #1 ·
I have a problem with fuel pressure. On accel it will lose fuel pressure as low a 15psi. The car itself goes lean when it happens.
What I have changed. 3 diff fuel pumps. regulator, injectors. and I checked to make sure the sump was still in the gas tank, it is.

I am at a loss

Please Help
 

·
Registered
Joined
·
6 Posts
What year and motor? how are you getting 15psi? do you have a gauge installed after the fuel filter?

What it could be:
Fuel Pump
Fuel pump rubber hose might have a hole in it
Fuel filter

Most old s13s have rust in the tank. you might want to check to make sure there isn't stuff floating around clogging the system.
 

·
Registered
Joined
·
3 Posts
Discussion Starter · #5 ·
92. Sr20det. i have a gauge installed on the exit of the rail before the regulator. I have tried 3 diff pumps, currently have a Deatschwerks 255. I have been in the tank checking to make sure that the bucket was still in place. It is. Other than that I have tried rewiring the pump. Its weird it doesn't do it all the time Free revving the engine it is fine. Just when its under load, sometimes. ITs like the pump cant keep up with the injectors, but the car goes super lean when the pressure goes down.
 
1 - 6 of 6 Posts
Top