Go Back   Infamous Nissan - Hardbody / Frontier Forums > Tech Area > Wiring and Electrical

Thread Tools Display Modes
Old 08-22-2019, 09:08 PM   #11
The Post Count Whore
ahardb0dy's Avatar
Join Date: May 2014
Location: Sorrento, Florida
Age: 55
Posts: 7,701
Vehicle: 2017 Nissan Frontier Desert Runner
Thanks: 67
Thanked 949 Times in 869 Posts

may want to check the vent line from the tank
My name is Tony and I'm a Infamousaholic

Current truck - 2017 Nissan Frontier Desert Runner ,

(formerly owned: 1993 Nissan Hardbody king cab 2wd, 90 Nissan Sentra, 94 Nissan Pathfinder SE 4x4, 05 Nissan Titan, 87 Nissan SE-V6 4x4 king cab, 94 Infiniti Q45t & 80 Datsun 310GX )
ahardb0dy is offline   Reply With Quote
Old 08-23-2019, 09:13 AM   #12
Join Date: Nov 2014
Location: _
Posts: 1,495
Vehicle: _
Thanks: 255
Thanked 197 Times in 170 Posts

The gas tank is semi pressurised.
h.stickeye is offline   Reply With Quote
Old 09-03-2019, 11:29 AM   #13
Join Date: Apr 2016
Location: Denver
Posts: 28
Vehicle: Nissan d21 1994
Thanks: 0
Thanked 5 Times in 4 Posts

I had the same issue turned out to be the fuel tank cap. It also helps to keep the tank full.
spl311 is offline   Reply With Quote
Old 01-15-2020, 04:18 PM   #14
Join Date: Jan 2019
Location: Charleston, SC
Posts: 63
Vehicle: 93 Nissan 4x4
Thanks: 5
Thanked 5 Times in 4 Posts

I was working on the truck with the battery disconnected and the noise manifested itself again. Loosening the cap did stop the sound.
Vwsnoopy is offline   Reply With Quote
Old 01-15-2020, 08:36 PM   #15
PoBoi850's Avatar
Join Date: Aug 2019
Location: Tallahassee
Posts: 598
Vehicle: 88 Nissan Truck
Thanks: 236
Thanked 65 Times in 59 Posts

I've never heard the sound, but it sounds like pressure is being released when you loosen the gas cap. Maybe converting to a vented style gas cap would fix the pressure build up.

:::Copied from the internet::::

Vented Gas Cap Function

The vented gas cap is designed to vent small amounts of air into the car gas tank line. The vented gas cap has a one-way release valve that is pressure-activated. When the pressure reaches a certain point (defined by so many pounds per square inch) the valve opens by a very small amount, relieving some of the pressure. In this case, the pressure is formed on the outside of the tank, due to the vacuum formed from the displacement of fuel on the inside. After the pressure inside the line equalizes, the pressure valve closes. The valve is set to balance the pressure with the surrounding atmosphere. Air is allowed in, but no fumes are allowed out of the gas cap, because of environmental concerns.

Inner Parts

The vented gas cap has a chamber under the plastic cap handle that inserts into the fuel fill line. The cap screws shut, and this chamber fits relatively close inside the intake tube of the fuel line running to the tank. On each side of the chamber are small openings where air is able to enter. These chambers lead to the pressure valve, which, as the level in the tank decreases, allows air inside to remove any possibility of a vacuum forming.

How it All Works

Because the fuel tank is pressure-driven from a fuel pump and gas naturally expands and evaporates, a large amount of pressure can build up inside the fuel system over time. This second kind of pressure is taken care of through the operation of the fuel pump mechanism, as the vented gas cap needs to be the one-way flap to keep evaporated gas fumes in.

Last edited by PoBoi850; 01-15-2020 at 08:44 PM.
PoBoi850 is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT. The time now is 05:10 PM.

Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.