Will not stay running, seems like it is flooding itself out?

1986 NISSAN HARDBODY
245,000 MILES • 3.0L • V6 • 4WD • MANUAL
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ALL120273NIS
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I have a 86 Nissan d21 vg30i v6. I've changed the fuel filter and rebuilt the throttle body. Every time I start it up it runs for 10-15 seconds and cuts off. Seems to be getting way too much gas and flooding out. Any ideas??
Sep 3, 2023 at 6:52 AM
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JACOBANDNICKOLAS
  • Experienced Mechanic
  • 110,240 POSTS
Hi,

Based on your description, it sounds like you may have a faulty fuel pressure regulator. (see pic below) I would suggest checking the pressure to make sure it is within the manufacturer's fuel pressure specifications.

Here is a link that explains how it's done:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

If you look below, I attached the pressure specifications. Note there is a vacuum hose on the regulator (pic 2). Disconnect the regulator vacuum hose and inspect it for fuel inside of it. Also, confirm the hose is good and supplies vacuum when the engine is running.

Let me know what you find.

Take care,

joe

See pics below.
Sep 3, 2023 at 4:14 PM
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ALL120273NIS
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I figured it might be Fuel pressure regulator but I can't find one like it online, I think they discontinued it.
Sep 4, 2023 at 2:01 AM
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JACOBANDNICKOLAS
  • Experienced Mechanic
  • 110,240 POSTS
Hi,

Have you checked the fuel pressure to confirm the regulator may be the cause? Also, here is the OEM part number. It's 1624003G15. If you google search it, they show up. As far as Nissan, certainly, by now they have discontinued it.

If you look at pic 2, it provides three different manufacturers that produce an aftermarket. The other manufacturers' part numbers are listed on the interchange. (pic 2)

Let me know if that helps.

Joe

See pics below.
Sep 4, 2023 at 1:49 PM
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ALL120273NIS
  • MEMBER
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Yes, that will help because I couldn't find the right one for it. Thank you
Sep 4, 2023 at 8:36 PM
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JACOBANDNICKOLAS
  • Experienced Mechanic
  • 110,240 POSTS
Hi,

You are very welcome. If you have a chance, let me know if you get what is needed and if it resolves the issue. I'm interested in knowing.

Take care,

Joe
Sep 5, 2023 at 10:58 AM
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