V70 D5 sudden power power loss

[SeanO'Connor]

Is the resistance of the Toyota pump motor the same as the volvo one? if it is lower it will dram more current, there fore overheating when the tank has less fuel in to cool it, making the ecu think it is faulty? just an idea.

[Bernard333]

Shimon , thanks for the contact number for Howard , I have been trying to get hold of him but hes off until Friday this week and will try again , in the meantime my clutch is now slipping when accelerating in top gear and again in Ireland have same problem as normal , cant get anyone to even look at it , main dealer isnt even able to make an appointment they are so busy but they did give me a price of Euro 594 just for the parts inc slave cylinder ( £ 478 ) and my indi mechanic cant look at it for two weeks . Have booked it into Volvomax for the clutch next week , thats if it will make it to Glasgow . Was thinking about doing the clutch myself but having read the Haynes manual have convinced myself its a job for the garage . Will also add the possibility of the ETM fault advised by Laneystrider to the list. Was hoping to get another 75k miles out of this car but looks like its going to start costing money from now on .

[shimon340]

hi there

ETM only affects petrol models

Keeping trying with Howard as he should be able to sort the cutting out problem.

interesting that you say clutch is slipping in top gear...what are the symptoms as a worn clutch would show itself more in lower gears when the load on it is higher rather than in top.

if you are experiencing a judder or jerky acceleration this could be the same source as the cutting out concern ie a fuelling issue?

[Bernard333]

Sean , I have 300 mile journey coming up and plan to wire an ammeter and voltmeter into the pump supply to see if it gives any clues whilst driving , the old pump could not resistance check as its gone open circuit . The Denso pump was giving 2 Bar with a 12V supply which is whats specified by Volvo but I wonder if there is any voltage control on the supply to control the pump output. I only have the Haynes manual which dosnt give a detailed wiring diagram .

[Bernard333]

Shimon , its definitely slipping in top gear , when doing 55mph and then accelerate clutch slips and then engine grips again when you take your foot off accelerator , I dont want to finish it off completely so I have only done this a couple of times , I am not getting getting clutch slip in lower gears but must admit have not tried to put any load on it , will check this .

[SeanO'Connor]

Good plans, make sure you connect your ammeter in series, and your volt meter in paralell though!!!!

[portacabin1]

Originally Posted by Bernard333

125k miles and now having problems , replaced failed diesel lift pump with a Denso pump from a 2000 Toyota ( its fits exactly into the Volvo/ Bosch plastic brackets and filter , all the pipes were able to fit and measured pressure is 2 Bar same as original Volvo but cost £10 instead of the £250 quoted by Volvo ). Car is still having problems , when tank gets less than 70%full car will not start and ' Urgent Engine System Service' comes on . Pipes in fuel tank are all in correct place and reaching the bottom of the tank. Second problem is that when trying to accelerate hard the same ' Urgent Engine System Service ' message comes up and loss of power ensues which can be restored by turning off the ignition and back on again . Under normal driving conditions everything seems ok and fuel consumption is fine at 50mpg +. Local mechanic used engine diagnostic on the engine and says there is no problem from the engine forwards , the engine mounted low and high pressure pumps are ok and the injection system working correctly as evidenced by everything being ok , any ideas what could be wrong ?

Hello bernard 333,
I have a v70d5 that used to cut out and would then have to be started by turning the key not of a bump start, the warning lightes came on ect, this would happen every 10 to 15 miles. After getting very depressed i found from this site that the main dealer can reprogram your ecu. after 20 mins mt local volvo agent in coventry charged me just over £60.00 and i have done hundreds of miles since, this might sort your problem. All the best

[Bernard333]

thanks for the advice portacabin , sounds like a possible solution , my main problem is getting to stay in one place long enough for a main dealer to look at the car , I am mainly in donegal ireland and the main volvo dealer has so much work on they cant even give me a date for looking at it . Have just spoken with Howard at Horwich motors as advised by Shimon and am hoping to get the car into Manchester within the next few weeks . Howard advised that problem with the tank needing to be 70% full could be because the V70 tank is split into 2 with a pipe connecting the two halves and there could be some issue with air in the pipe or it not having been placed correctly within the tank . I am going with this theory for now and will check it out this weekend if it stays dry but I am fairly certain the car has multiple problems and this may not be the answer to the power problem so will still plan to take it to Horwich motors . I can still drive the car and knowing what the limitations are I can manage to keep on going but as you can imagine its not ideal being unable to put your foot down when needed and also having to always ensure the fuel tank is full .

[petevolvo]

Hi, as a Volvo specialist I've come across this a few times. The problem almost certainly is the in tank pump. The tank has a 'saddlebag' arrangement and what happens (when less than 70% or so full) the pick up from one side doesn't draw the fuel (not an issue when full). It's the one on the opposite side to where the main pump is. Often the pipe has just come loose so the fuel is pumping, but not reaching the main pump housing.
As I say, we've had it a few times so I would recommend checking (I, would also, personally, fit the right Bosch pump) but also, don't want to scare you but if the car has been starved of fule this can, and often does, damage the main fuel pump (on the engine).

[Bernard333]

Pete , you are right about the failure to pump from one side to the other . I had started a separate thread regarding this but have now found the reason , had the fuel pump out again and the Denso pump is still working fine . The 70% problem started when the fuel pump was replaced although at the time I had not realised this , when the pump housing was taken out of the tank the pipe going from the other side of the fuel tank which goies to a T peice on the bottom of the pump plastic pot housing had been snapped off , the remaining part of the pipe clips to the side of the pot and feeds into the top of the pot and although this is still connected I am sure its doing nothing because of the break further down , I have found that a small piece of copper brake pipe fits inside the broken T peice perfectly and am planning to use Araldite to strengthen and hold the joint but I dont know if Araldite will resist diesel ? I worked at Garrett Turbochargers for a while and Araldite was the answer to everything but never tried it immersed in deisel . I am repairing the pipe as I am told you cannot buy the part separately .