Volvo D5 CP3 HPFP Fuel Pressure Control Valve SCV Check - Eighth Stage

My 2007 Volvo XC90 cranks but would not start. Low pressure pump sends fuel to high pressure pump but then fuel would NOT get to common rail - Bosch CP3 0445010111 HP pump is not pumping fuel through outlet.
In this video I'm checking the fuel pressure control valve or fuel volume control valve by taking off the pump.
1st Bulb connected to SCV connector
2nd Live Data from scanner with bulb connected (same readings with SCV connected as well). This scanner has no option to adjust anything for this one. If there is please let me know
3rd SCV removed out of the pump but connected to ECU. Then very low pressure air is blown into the valve to check its function
If you think HP pump is not working for other reasons, please advise in the comment section below.
Thank you very much in advance.

[@lyudmilvarbanov7294]

The valve purpose is to open/close the flow of fuel from the priming electric pump to High Pressure pump.After that the fuel goes to the rail end and injectors.Try to check the fuel flow on the inlet to each injector-one by one - bleeding the air from fuel lines.

[@pharmazynouni6897]

It do dim the light because it has something to do with frequency of current not curent on itself I think
On oscillo it shows waveforms

[@jmoore9806]

Seems like its doing what the ECU is commanding ?

[@OliverGatch]

have you checked the resistance of the SCV? usually if the reading is higher for example its normal reading should be 3ohms but when tested using a multi meter if it reads 5ohms is already subject for a replacement,have it also scanned to show the live data stream of the SCV if it can still hold pressure

[@MrZakmuh]

Thanks for your comment Oli. That car is sorted. It was actually the fuel pressure issue due to lack of enough priming. I'll update it in the description above

[@vffa]

@@MrZakmuh What exactly do you mean by priming? I have about the same problem. I cleaned the injector housing and replaced the seal on the intake manifold (the thing where the camshaft is under). Now the noise i had before is gone, however i now get 0hpa fuel pressure. I belive this is connected to either a faulty sensor or the High pressure pump. Im still trying to rule out what the exact cause, is. I did not try to remove any air from the high pressure metal lines (according to the internet this isnt neccesary and i i actually wouldnt know how to do that properly)

[@MrZakmuh]

Priming...let me put it this way...it means getting rid of air from fuel and getting a steady fuel supply to HP pump.
Basically for Volvo, you need turn ignition key ON and OFF until no air is left in the system.
For this when you turn ON ignition, check if you could hear air bubble noise in the fuel filter housing under rear passenger seating. If you do then keep doing ON/OFF cycle like 20 times until you could only hear a whining noise without fuel flow noise

[@marti4580]

Hi, what was the fix for this? Thanks

[@gheorghinacov6008]

You sure that’s not metal shavings on the tip of the valve? Is the pump in good condition?

[@matthewmatthew8878]

super idea

[@cernos32]

And how many it supposed to be on the computer? 600all the time? Without switching off after 5sec?

[@philippedubelloy4083]

Hello,
I have a 2017 Volvo V40 D2 2.0 with the same problem. How did you fixed?
Regards

[@NdumisoDeBooi]

🎉

[@關西-d9t]

This design!! What I encountered! The car malfunctioned! It stalled when taxiing! It’s really dangerous! At least let the fuel pass! Instead of shutting down completely!

[@azdinetamani2057]

Nulle

[@azdinetamani2057]

👎