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General Category => General Discussion => Topic started by: Dnaj on August 10, 2015, 09:31:33 AM

Title: Weird widget under gas tank 2001 Cali
Post by: Dnaj on August 10, 2015, 09:31:33 AM: Got this new to me, 2001 California EV which had a slight fuel leak when running. Found this widget under the fuel tank in the return line. It was loose and the small hose fitting was also disconnected. What is it? My older California has a straight return line. Also, where does the hose connect. I found a disconnected vacuum type hose under there but both ends are disconnected. Where might they connect. Thanks.

(http://i713.photobucket.com/albums/ww138/dnaj11/IMG_20150806_181551_346_zpsdekqgitn.jpg)

(http://i713.photobucket.com/albums/ww138/dnaj11/IMG_20150807_150325_928_zpslpielxsw.jpg)
Title: Re: Weird widget under gas tank 2001 Cali
Post by: rocker59 on August 10, 2015, 09:33:34 AM: The nipple should remain open to air.

Not sure about the vacuum lines. Could be left over from carbon canister removal, or could go to the tank vent outlets under the fuel tank
Title: Re: Weird widget under gas tank 2001 Cali
Post by: Dnaj on August 10, 2015, 09:57:05 AM: Thank you. What is it? If it's loose or leaking, could it cause a low idle occasional sputter or stall?
Title: Re: Weird widget under gas tank 2001 Cali
Post by: bmc5733946 on August 10, 2015, 10:00:51 AM: That is the fuel pressure regulator, could cause running problems anytime. Small hose to atmosphere.

Brian
Title: Re: Weird widget under gas tank 2001 Cali
Post by: oldbike54 on August 10, 2015, 11:00:47 AM: Quote from: bmc5733946 on August 10, 2015, 10:00:51 AM
That is the fuel pressure regulator, could cause running problems anytime. Small hose to atmosphere.

Brian

Hmm , always thought it was a flamilator exchanger valve :huh:

Think now that was wrong and it is fuel pressure regulator :laugh:

Dusty
Title: Re: Weird widget under gas tank 2001 Cali
Post by: Kiwi_Roy on August 10, 2015, 11:08:26 AM: An early FI document showed the nipple connected to manifold vacuum, I suspect it was supposed to do something to the mixture but the ECU takes care of that, my EV has the regulator mounted on the frame with just a line going back to tank, same idea though.
The regulator sets the pressure at 45psi and the nipple should be open to atmosphere.
Title: Re: Weird widget under gas tank 2001 Cali
Post by: twhitaker on August 10, 2015, 11:11:27 AM: On my Centauro and LeMans the regulator is mounted where the second fuel tap would have been.
Title: Re: Weird widget under gas tank 2001 Cali
Post by: oldbike54 on August 10, 2015, 01:45:17 PM: Quote from: Kiwi_Roy on August 10, 2015, 11:08:26 AM
An early FI document showed the nipple connected to manifold vacuum, I suspect it was supposed to do something to the mixture but the ECU takes care of that, my EV has the regulator mounted on the frame with just a line going back to tank, same idea though.
The regulator sets the pressure at 45psi and the nipple should be open to atmosphere.

Don't think it controlled mixture , the vacuum was to control the diaphragm . More vacuum , more
fuel that could pass through the regulator . At least that is the way I understand it :laugh:

Dusty
Title: Re: Weird widget under gas tank 2001 Cali
Post by: JoeW on August 10, 2015, 02:28:47 PM: The vacuum diaphragm controls fuel pressure. With vacuum applied, it drops the fuel pressure about 5 psi. In automotive applications, manifold vacuum is applied to the regulator, under acceleration when intake manifold vacuum drops, fuel pressure is bumped up to aid in smooth acceleration. The ECMs on those vehicle are programmed for this, your bike is not. Just let it breath.
Title: Re: Weird widget under gas tank 2001 Cali
Post by: Zoom Zoom on August 11, 2015, 03:50:15 AM: What Rocker 59 told you is correct, including the probable emissions lines.

Having an '01 EV from new, presently another one, and under the tank of a few others. There is nothing connected to that nipple.

John Henry