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R33 Fuel Pump Control Question

cobbadan

By cobbadan,
in R Series (R30, R31, R32, R33, R34)

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cobbadan Enthusiast

cobbadan

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Posted

My car - R33 gtst, series 1

On the power fc sensor check screen there is one called F/P which is described as fuel pump, another one called FP1 which is described as fuel pump control.

At idle the F/P is on and the FP1 is off.

When the throttle is pressed the FP1 switches on, back off and it switches off again.

I did find a possible/plausible explanation which goes a bit like this.

As a safety feature, when the car is started, the fuel pump is powered by the ecu. After a certain time, lets say five seconds, there is a relay that switches so that the fuel pump is being powered through the oil pressure sensor. The reason for this is so that in the event of an accident where the engine is mangled, the engine will stop, oil pressure drops to 0 and fuel pump switches off to prevent a fire from fuel pissing out everywhere.

Cant remember where i found that, but i know it was not on a nissan forum, so could be totally un-related to our cars, but it does seem plausible.

Can anyone explain if this is whats happening with this FP1 sensor switching on with throttle ie : fuel pump being powered by ecu, then when ya back off it switches to being powered by oil pressure sensor.

Or something similar

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https://www.sau.com.au/forums/topic/378576-r33-fuel-pump-control-question/
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