Nismo Fuel Pump For 32 Gtr

[intune]

Replaced stock fuel pump to a nismo unit and having troubles starting at cold starts and sometimes warm starts. The nismo fuel pump works fine, just needs a little accelerator and then it idles normal.

Replaced FPR with a standard unit with old fuel pump and was starting fine.

Replaced fuel sending rubber and lined up all markers.

Has standard ecu.

Has anyone got any ideas?

Cheers in advaned

[Tomek]

Could be as easy as starter motor?

Mine has the same problem in them morning after not being started for a few days.

Edited May 11, 2008 by Tomek

[Beer Baron]

did you clip it to the bottom of the tank properly? check it's secure down there.

[R31Nismoid]

Could be the battery isnt quite upto the task

RB's need good voltage or they struggle to fire sometimes

[GeeTR]

Replaced stock fuel pump to a nismo unit and having troubles starting at cold starts and sometimes warm starts.

.......

.. ummm are these two separate issues, or has the 'hard to start' issue been instigated from the Nismo pump change?

I thought u meant the later... as needing throttle input at cold start might be due to too much fuel delivery; checking your base would be the ticket no?

Replaced FPR with a standard unit with old fuel pump and was starting fine.

Assuming the red text was meant to be "and", does the above mean, that when you put the std pump and reg back in - cold starting was fine, and by that do you mean you did a Nismo pump and an aftermarket adjustable FPR change?

Search sau 'fuel base pressure'

GL

Edited May 12, 2008 by GeeTR

[infamous_t]

Have you upgraded the wiring to the pump to cope with the extra load the new pump places on the electrics?

Shouldn't make a difference if you wait till the pump primes tho.

[intune]

did you clip it to the bottom of the tank properly? check it's secure down there.

Checked the pump and it is secure

Could be the battery isnt quite upto the task

RB's need good voltage or they struggle to fire sometimes

When driving it the voltage reads above 12 at the cluster, will have to check with multi meter, what should it read when cranking?

.......

.. ummm are these two separate issues, or has the 'hard to start' issue been instigated from the Nismo pump change?

Problem started when i placed the nismo pump

I thought u meant the later... as needing throttle input at cold start might be due to too much fuel delivery; checking your base would be the ticket no?

Assuming the red text was meant to be "and", does the above mean, that when you put the std pump and reg back in - cold starting was fine, and by that do you mean you did a Nismo pump and an aftermarket adjustable FPR change?

To clarify,

Std fuel pump with brand new standard FPR (non adjustable) was starting fine. Since new nismo pump the problem occurred.

Search sau 'fuel base pressure'

Will do a search, but how do i test for 'fuel base pressure', I suppose that I need to a mechanic.

GL

Have you upgraded the wiring to the pump to cope with the extra load the new pump places on the electrics?

Shouldn't make a difference if you wait till the pump primes tho.

I did not think that I needed to run extra wiring, I thought it was only for the bosch pumps.

Has anyone needed to place extra wiring when installing nismo fuel pumps?

Cheers for the helping out.

[GeeTR]

Will do a search, but how do i test for 'fuel base pressure', I suppose that I need to a mechanic.

You'll need a fuel pressure gauge and 5 minutes.

[srimes101]

You'll need a fuel pressure gauge and 5 minutes.

anyone ever come up with a solution to this . i have the identical problem!