Issue after new fuel pump installed


Information and questions on GL1500 Goldwings (1988-2000)
Post Reply
Jmicester24
Posts: 68
Joined: Wed Mar 16, 2022 12:52 am
Location: Phx, Az
Motorcycle: 1999 GL 1500

Issue after new fuel pump installed

Post by Jmicester24 »



Hello All!

Quick question! I have a 1999 wing. My stock fuel pump was going out, so I replaced the fuel lines and the pump with the Airtex E8371. After installing, I immediately took my Wing for a spin. The bike seemed to have more power and acceleration. Upon return I noticed my idle was a bit high at 1200rpm. I turned it down to about 800rpm and went inside.
I came out a bit later and tried to start the bike and it would not start. I finally got it to start by giving it a bit of throttle. I never had to start it that way prior. While I had the bike running, I tried the choke to see what it would do and it immediately kills the bike. I would guess that the choke is now flooding the carbs? Before I installed the pump, I never had these issues.
Any ideas on what I need to do to have the bike back to normal?
Do I need to mess with the air fuel mixture?

Any input is greatly appreciated! Thanks in advance :)


User avatar
Rambozo
Posts: 3621
Joined: Sun Apr 01, 2018 8:36 pm
Location: Disneyland
Motorcycle: 1992 GL1500 Aspencade
Ducati Monster

Re: Issue after new fuel pump installed

Post by Rambozo »

You might need a fuel pressure regulator. That pump is a touch high and depending on manufacturing tolerances it might be a bit too much for your bike.
Stock Honda is 1.5 - 2psi that pump is 4.5psi.
The NAPA P72190 fuel pump @ 2.5psi is a closer match.
Jmicester24
Posts: 68
Joined: Wed Mar 16, 2022 12:52 am
Location: Phx, Az
Motorcycle: 1999 GL 1500

Re: Issue after new fuel pump installed

Post by Jmicester24 »

I went to Napa, they said there is none within the Phoenix area and the manufacturer doesn't not have any in stock. Is there another comparable pump?

Will any of these work??
https://www.amazon.com/HFP-360ST-Replac ... +Aspencade

https://www.amazon.com/Carter-P72190-Ca ... B000BZZ7JS
Find This Item on Amazon:
User avatar
Rambozo
Posts: 3621
Joined: Sun Apr 01, 2018 8:36 pm
Location: Disneyland
Motorcycle: 1992 GL1500 Aspencade
Ducati Monster

Re: Issue after new fuel pump installed

Post by Rambozo »

No idea. Because the number is the same it's a good guess that the Carter pump is what Napa sells. However, I was not able to find a pressure spec. The cars it is listed for make me thing it is a normal 4-7psi automotive pump. But without measuring who knows.
Many years ago I had the same issue on another bike where the small electric fuel pump I used was too much for the carbs. I just used a regulator like this to correct it as finding an ultra low pressure fuel pump was not easy.
https://www.amazon.com/dp/B08CZKJ9D9/?tag=goldwingdocs-20

K&N has one, but it's not an in-tank style.
Find This Item on Amazon:
Jmicester24
Posts: 68
Joined: Wed Mar 16, 2022 12:52 am
Location: Phx, Az
Motorcycle: 1999 GL 1500

Re: Issue after new fuel pump installed

Post by Jmicester24 »

I just bought the fuel pressure regulator. It will be here Friday. I will install this weekend and report back. Thank you for your input! :)
Earl43P
Posts: 147
Joined: Sat Nov 01, 2014 7:15 pm
Location: Farmington, PA
Motorcycle: 21 KTM390A
2008 GL1800 Navi
99 Valkyrie IS
04 Polaris Magnum 330

Re: Issue after new fuel pump installed

Post by Earl43P »

I hope the regulator works for your bike.

If not, Google "1-3 psi fuel pump" and you'll find a Facet Cube 12v Fuel Pump, 1/8 NPT, 1.5 - 2.5 from various vendors.
You don't want the 1/8 NPT version necessarily, although you could make it work, just pointing out that "they make them" in the lower psi range that our bikes need.

There is also one for a Kawasaki Mule 3000 which is 1-2 psi for $14- $15 on EBay.

I do believe that the one you installed is overcoming your carbs' bowl float valves.
When all else fails, RTFM!

2008 Goldwing Navi
21 KTM390A “Hootenanny”
99 Valkyrie Interstate, “Favorite”
82 GL1100 Sold 3/17 (miss that ticket getter)
93 GL1500I Sold 3/20 (Meh, but put 56k miles on it)
04 ST1300 Sold 4/22 (Fast, fun, never “loved” it)
User avatar
Rambozo
Posts: 3621
Joined: Sun Apr 01, 2018 8:36 pm
Location: Disneyland
Motorcycle: 1992 GL1500 Aspencade
Ducati Monster

Re: Issue after new fuel pump installed

Post by Rambozo »

The cube pumps are great for some applications, but the 1500 is an in-tank pump, And the cube pumps typically can't be submerged.

BTW don't run racing fuel through a cube pump. The epoxy that holds them together will dissolve. Ask me how I know.
Jmicester24
Posts: 68
Joined: Wed Mar 16, 2022 12:52 am
Location: Phx, Az
Motorcycle: 1999 GL 1500

Re: Issue after new fuel pump installed

Post by Jmicester24 »

If the fuel pressure regulator does not work. I will try the pump for the Kawasaki Mule.
Jmicester24
Posts: 68
Joined: Wed Mar 16, 2022 12:52 am
Location: Phx, Az
Motorcycle: 1999 GL 1500

Re: Issue after new fuel pump installed

Post by Jmicester24 »

Rambozo wrote: Wed Jul 27, 2022 8:01 pm No idea. Because the number is the same it's a good guess that the Carter pump is what Napa sells. However, I was not able to find a pressure spec. The cars it is listed for make me thing it is a normal 4-7psi automotive pump. But without measuring who knows.
Many years ago I had the same issue on another bike where the small electric fuel pump I used was too much for the carbs. I just used a regulator like this to correct it as finding an ultra low pressure fuel pump was not easy.
https://www.amazon.com/dp/B08CZKJ9D9/?tag=goldwingdocs-20

K&N has one, but it's not an in-tank style.
I just installed the fuel regulator. It looks like its working so far! I took it for a quick 2 mile spin in the highway and it seemed to perform well. Thank you!!
Find This Item on Amazon:


Post Reply