2006 V70 2.4D cut out and won't start

[gck303]

Thank you everyone.

I have put two gallons of fuel in, and it worked!!! I am now at a total loss at how a defective fuel pump can only stop pumping when the fuel level drops beneath 1/8 tank.

No doubt when I get to examine the pump I will understand.

I must say I like the idea of just listening at the open filler cap to hear the pump going.

I will report back once I have got the pump replaced.

[Brendan W]

Hold off replacing the pump until you have checked out the transfer plumbing across the tank saddle. This is a well known problem with these cars at low fuel levels and on an incline.

[john493]

Originally Posted by gck303

The fuel level is exactly 1/8 tank. The light is not on, but it is saying 125 miles left.

Sounds like it might be the fuel pump...

I have just found this, which explains how to test the pump.
https://www.matthewsvolvosite.com/fo...ic.php?t=52252

That link is for an 850 / V70 ph1 - different design.

[Simon Jones]

Originally Posted by gck303

I am now at a total loss at how a defective fuel pump can only stop pumping when the fuel level drops beneath 1/8 tank.

It doesn't. - it's probably not working at all. There are two tanks joined by pipework. Each tank has a level sensor and the gauge displays the average of two readings. It is possible that the tank on the N/S could be 100% full while the one on the O/S where the pickup draws from is empty, but the gauge will show you have half a tank remaining and yet there is no diesel available to run the engine.

[cheshired5]

The pick up problem can be seen and diagnosed quickly with Vida as Vida shows the imbalance between the two fuel level sensors.

[gck303]

On taking the car to the garage it took a good few seconds for the pump to get enough fuel to the engine to turn

The problem is now fixed and it starts very quickly.

Total bill was £370 (£250 pump plus £90 labour). Apparently it took four pumps before the supplier could get one that fitted my car. Goodness knows what is happening there, as I have had a similar problem with a PS pump and them being supplied with a different flange.

[MPE]

Hello,
I seem to have the same problem but on a slighly later P2 V70 2002.
I have done all the above checks and believe I have a bad fuel pump.

My car has NO fuel pump control module and is fitted with a Bosch 0 580 313 115 in-tank pump.

The top of the pump has a 6-way plug with two thick wires and 3 thinner wires.
I assume that the thicker wires go to the pump motor and the resistance reading between them is 35 ohms - which seems very high.

Does anyone have a pin-out chart for this plug to explain what the connections are?

I have tried connectiong 12 volts directly to the two thicker wirs but the pump wont run. Is there another control inside the pump? Thanks, Alan

[Clan]

Originally Posted by gck303

On taking the car to the garage it took a good few seconds for the pump to get enough fuel to the engine to turn

The problem is now fixed and it starts very quickly.

Total bill was £370 (£250 pump plus £90 labour). Apparently it took four pumps before the supplier could get one that fitted my car. Goodness knows what is happening there, as I have had a similar problem with a PS pump and them being supplied with a different flange.

if they fitted just a non volvo pump in the original reservoir you may well have the same problem , The reservoir is supposed to stay full it holds about a litre or more, even if your tank was bone dry on a 45 degree hill it should start and get you about 5 miles at least … what was happening is the one way valve in the bottom of the reservoir is leaking fuel back into the tank , so if you are on a slope it is empty . You should have changed the whole unit like volvo recommend , .