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M35 Aftermarket Fuel Pump

cha_cha_

By cha_cha_,
in Four Door Family & Wagoneers

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Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

Should be more than fine, especially the overall fuel pressure would never exceed 3.5bar (assuming that thing never gets more than 0.5bar of boost in stock form).

According to the chart, it's 11amps.

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GTSBoy Grand Master

GTSBoy

Posted
Posted
2 hours ago, iain_ST44GA said:

I definitely know the first rule here, look first, ask second. I've seen many people get roasted 😂

I found a few diagrams for the RB, but I'm yet to come across one for the VQ. From what I have read, the pump gets the +12v along with the FPCM, and it's the negative wire that gets passed through the resistor to regulate the voltage. So I assume I can just ground the negative wire at the pump to eliminate the FPCM control. But I really wanted to see the VQ circuit diagram first to make sure I understood it correctly. Once the new pump is in I'll do some testing to see how it behaves, and in the meantime, I'll keep looking for a wiring diagram.

Thanks for your help mate, your time is greatly appreciated.

My apologies. I forgot we were talking about weird beard M series stuff. Had been talking elsewhere with someone about an R33 with similar subject and got confused.

  • Haha 1
iain_ST44GA Collaborator

iain_ST44GA

Posted
Posted
17 hours ago, GTSBoy said:

My apologies. I forgot we were talking about weird beard M series stuff. Had been talking elsewhere with someone about an R33 with similar subject and got confused.

All good mate, the info helped me a lot :)

Once I got the pump out of the tank, it was clear why it shit itself. The pump assembly and tank were full of mud and rust. Yukk! 🤮

It took f&%king hours to clean everything up properly!

M35 pump.png

M35 tank.png

Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

Here's the chart for fuel pressure vs. current draw, assuming your base fuel pressure is 3 bar and you run like 0.5bar boost on WOT, you should only momentarily hit 9amps here and there.

(Ignore my prev post, I cannot read a chart these days it seems)

image.thumb.png.e7101d15aa96b6669661525e7b54b823.png

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      By Dose Pipe Sutututu · Posted

      Here's the chart for fuel pressure vs. current draw, assuming your base fuel pressure is 3 bar and you run like 0.5bar boost on WOT, you should only momentarily hit 9amps here and there. (Ignore my prev post, I cannot read a chart these days it seems)
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