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I have a Nissan Primera P12 2001 (2500cc) which was working without any issues. Yesterday when I try to start, it wouldn't.

Talking to the repair guy said it was the fuel pump. But later he said it is the crank sensor at fault, which prevented the car from starting due to sending bad readings to the computer, but I still have to replace the fuel pump, as it failed too.

So my question is, can a problem in crank sensor cause fuel pump failure? or is it pure coincidence? (or I'm about to pay too much money)

(I don't know what crank sensor does)

UPDATE: I was told both crank position sensor AND cam sensor needs replacing. I believe this is the model I have http://www.carfolio.com/specifications/models/car/?car=232980

UPDATE 2: Here's the photos of the faulty fuel pump https://i.sstatic.net/lPM1V.jpg

Madushan
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1 Answers1

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Sounds strange.

I can understand that the absence of a crank position sensor signal can prevent the engine from starting (the ECU won't allow the car to run without it). The lack of signal could also prevent the fuel pump relay from activating and priming the fuel lines.

But I'm struggling to buy that a bad crank position sensor would result in physical failure of the fuel pump.

Electrical fuel pumps usually fail when the brushes in the electrical motor wear out, weakening the ability of the pump to pressurize the fuel.

It could be that the mechanic wants to replace the fuel filter that has clogged up over time, and the fuel filter is part of your vehicle's fuel pump. However, most fuel pumps should allow you to replace the fuel filter without having to swap out the more expensive fuel pump.

Zaid
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