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Running Lean On An Er34

8110

By 8110,
in Engines & Forced Induction

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8110 Mentor

8110

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Posted

Hi. My ER34 is running pretty lean at high revs (boosting at 0.8) as data was shown via a dyno. The car is running on stock ECU and I have no plans to upgrade to an aftermarket ECU due to budgetary concerns.

My question is. Could I run a bigger fuel pump (perhaps a factory BNR34 unit) and a fuel regulator to curb this problem?

Or would there be no difference due to the factory ECU has already maxed out the injectors?

Thanks for your comments.

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DECIM8 Grand Master

DECIM8

Posted
Posted (edited)

Most likely the fuel pump is/already is on its way and it will need replacement. Yes replace with a GTR pump and no if its got stock everything no need for a Fuel Reg..

Id recommend a new pump as would most people on the forum as the GTR one will likely fall to the same fate (they are 10 yrs old approx)

The pump should end your problems.

If you are using a bigger turbo for some reason you may need to use a fuel reg to max the injectors. If thats the case perhaps a upgrade is what you need (injectors and ecu)

Edited by DECIM8
8110 Mentor

8110

Posted
  • Author
Posted

DECIM8, yea noted on those used factory BNR34 fuel pump. They may be on its way out too.

Ok, so a new pump is definitly better. Are those from Walbro good enough?

I am running stock turbine. Actually, would a piggy back fuel mangement, say a S-AFC solve my problem or a new fuel pump is the way to go? Fuel regulator isn't necessary?

R34NRG Grand Master

R34NRG

Posted
Posted (edited)
Because the fuel pump is dying

Its probably the top 10 of Skyline basics.

how is the fuel pump dying if nothings changed from the factory?

::edit::

sorry i didnt realise he was running higher boost, which is still a bit odd, i ran close to 1bar and never had issues.

meh :whistling:

Edited by R34NRG
DECIM8 Grand Master

DECIM8

Posted
Posted

It could have 200km on the engine, it could have been run very empty many times.. If so its been abused so needs replacing.

Hopefully hes checked his filter first.

Woo I just got my Tomei Pump, man this kit is good comes with new seals and even clips!

R31Nismoid Grand Master

R31Nismoid

Posted
Posted
how is the fuel pump dying if nothings changed from the factory?

Same way any other pump does - Its called time

Most Nissan pumps fail or perform under par fairly quickly. Part and parcel.

I've had stock pumps fail in factory standard cars before, its nothing new at all

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