Purpose of fuel tank pressure sensor

Reply Subscribe

Thread Tools

Search this Thread

Jul 24, 2008 | 05:04 PM

Frostbite

Thread Starter

On The Tree

iTrader: (14)

Joined: Jan 2005

Posts: 151

Likes: 0

From: St. Louis, MO

Purpose of fuel tank pressure sensor

What is the purpose of the pressure sensor on top of the tank bucket (looks like a map sensor). If it is related to the evap, and I remove the evap, do I still need the sensor?

Jul 25, 2008 | 10:16 AM

zman1969

TECH Enthusiast

iTrader: (91)

Joined: Jan 2005

Posts: 662

Likes: 12

From: Dallas Tx

tank pressure sensor

emission related , I believe it senses pressure so ECM can verify no evap system leak. if no pressure system therefore would have a leak- bad gas cap or leaking evap line

Jul 25, 2008 | 03:43 PM

XpEdItIoUs

10 Second Club

iTrader: (44)

Joined: May 2004

Posts: 1,658

Likes: 0

From: Phoenix, AZ

Quote:

Originally Posted by zman1969

emission related , I believe it senses pressure so ECM can verify no evap system leak. if no pressure system therefore would have a leak- bad gas cap or leaking evap line

exactly, you would have to disable the codes from the pcm if you ever remove your evap and vent into the world.

Jul 25, 2008 | 05:19 PM

MeentSS02

Kleeborp the Moderator™

iTrader: (11)

Joined: Mar 2004

Posts: 10,316

Likes: 6

From: Dayton, OH

I concur...it is related to EVAP. You just have to go in and delete the codes related to it, and that's it.

Jul 30, 2008 | 10:21 AM

mterveen

TECH Apprentice

iTrader: (2)

Joined: Jun 2007

Posts: 363

Likes: 0

From: Spearfish SD

+1^ I removed all my evap stuff, and used the pcm wiring for the fuel tank pressure sensor instead for my autometer fuel pressure sending unit.

Jan 9, 2010 | 05:09 PM

Big_Bird_WS6

Banned

iTrader: (7)

Joined: Apr 2009

Posts: 1,628

Likes: 1

^^^ so can i just remove it and plug the hole if i am deleting evap?

Jan 9, 2010 | 05:50 PM

XpEdItIoUs

10 Second Club

iTrader: (44)

Joined: May 2004

Posts: 1,658

Likes: 0

From: Phoenix, AZ

Quote:

Originally Posted by Big_Bird_WS6

^^^ so can i just remove it and plug the hole if i am deleting evap?

I wouldn't plug the hole because you will have pressure build up inside the tank. Just add a hose with a breather filter on the end of it.

Edit. If you talking about removing the sensor and pluging the hole then yes. But add a hose and breather to the nipple that would go to your evap canister.