Engine: D5: V70 very inter power loss cured !!

[ptf]

Originally Posted by ptf

have not changed the inlet pipe yet, as am considering ordering a new R design (see my other posts in xc90). But i have discovered something today as had the car serviced at my independent mechanic and mentioned this possible cure to him and he said he would take a look, but he discovered that the ali pipe that is the other connection end of the inlet pipe has a broken bracket and when the car is revved hard there is a lot of movement in the system, do you think this could be my problem or that when the inlet pipe compresses due to being weak it has over time put excess pressure on the bracket, which has broken it.

All changed now, complete pipe from air box to turbo, and have just come back from a week in France and HAS NOT CURED!.
Coming home was fine for about 350 miles. then stopped for literally a few minutes then back on the road, and on and off from there. Weather outside was hot around 28. Its really annoying me and am almost at the point of getting rid of the car, but really dont want to as it is perfect. if anyone thinks they can help, And wants a more detailed description of when it happens please let me know and I will email to you.
Thanks

[v_matt_v]

I went through boost problems on my s60 in the past. If you want you can PM me the whole story. I might be able to help.

Cheers,
Matt

[ptf]

Originally Posted by v_matt_v

I went through boost problems on my s60 in the past. If you want you can PM me the whole story. I might be able to help.

Cheers,
Matt

Hi Matt,for some reason i cant send a PM, so i have copied and paste the email to this forum.

Hello matt, thanks for offering some help, I am getting fed up, I know Its no use letting volvo have it as from what i can see is they have no idea what causes this and trial and error my wallet.
I will try and keep the explanation as brief as poss, but with the details.

The problem only ever happens when the outside temperature is over 22 degrees and the engine has been working hard either lots of town driving, start and stop etc or after a long run on motorway, basically the engine is also hot. (this problem has never happened when the weather is cool, even after a really long run etc)
Once the engine service light comes on there is a slight loss of power if travelling around town and will suddenly shoot forward like the turbo cuts in. after a while and usually when i can get the boost of the turbo to cut in it will go out.
On my recent trip to France, the weather on the return trip was 28 and after about 350 miles and a stop at a tollbooth as soon as I started the light came on, slight loss of power, but once I got up to 80 the light went out and from then on it was off and on for the rest of the 250 miles, even after an hour stop. I have had the engine mount vacuum parts changed, a full smoke leak test, also some senors were changed to test and were allfound to be ok so they were changed back.

If you can help, Thanks
Paul

[v_matt_v]

Paul,

1. What sensors and parts exactly have you checked?
2. What parts have you replaced?
3. What is the error code which appeared on the dash? You'll have to ask someone with code reader to do that. The best would be if they could read the code when the message is on the dash.

Matt

[ptf]

Originally Posted by v_matt_v

Paul,

1. What sensors and parts exactly have you checked?
2. What parts have you replaced?
3. What is the error code which appeared on the dash? You'll have to ask someone with code reader to do that. The best would be if they could read the code when the message is on the dash.

Matt

Just remembered that when I had a service a few weeks ago, he pointed out that the airbox did not seal properly over the filter, its distorted and wont close 100% and you can see the orange rubber of the filter, could this possibly be the cause and could this be a cause of a slight whistling on acceleration

[v_matt_v]

Originally Posted by ptf

Just remembered that when I had a service a few weeks ago, he pointed out that the airbox did not seal properly over the filter, its distorted and wont close 100% and you can see the orange rubber of the filter, could this possibly be the cause and could this be a cause of a slight whistling on acceleration

Whistling yes, the rest no.
I would change garage after such diagnosis. The rubber bit of the air filter sticking out of the air box is quite a common problem. It can cause whistiling if it's not closed with all the plastic straps, otherwise it's ok.
The MAF is on the way out of the air box, therefore it doesn't matter if the air is coming through the filter or not. The air by-passing the air filter has more dust in it so it can lead to the increased engine contamination which especially for turbo is not the best.

Matt

[hobbyhorse]

Paul, as Matt asked can you please specify exactly what has been changed as nobody can really help without this info.

[ptf]

Originally Posted by hobbyhorse

Paul, as Matt asked can you please specify exactly what has been changed as nobody can really help without this info.

The front engine vacuum mounts have def been changed, apparantley there is a couple of sensors which have been checked by replacement but were fine so the old ones put back, but I cant remember what they were called, the complete inlet pipe from the airbox to turbo, and a full smoke test has been carried out.
So in the grand scale of things probably not much when you think of how many parts involved.
I find it hard to believe that Volvo do not know what this could be as it seems such a common problem on this engine, there is so many people on here with the problem and i am sure this is only a small minority of owners.thanks in advance to anyone who offers help but i am thinking it may be a lost cause.
Thanks Paul

[hobbyhorse]

Originally Posted by ptf

The front engine vacuum mounts have def been changed, apparantley there is a couple of sensors which have been checked by replacement but were fine so the old ones put back, but I cant remember what they were called, the complete inlet pipe from the airbox to turbo, and a full smoke test has been carried out.
So in the grand scale of things probably not much when you think of how many parts involved.
I find it hard to believe that Volvo do not know what this could be as it seems such a common problem on this engine, there is so many people on here with the problem and i am sure this is only a small minority of owners.thanks in advance to anyone who offers help but i am thinking it may be a lost cause.
Thanks Paul

Inter faults are always tricky & the D5 is a bit of a messer; methinks TCV mounted on the engine block near the starter motor about £100 easy diy fit or VNT sticking on the turbo (far more serious)

[ptf]

Originally Posted by hobbyhorse

Inter faults are always tricky & the D5 is a bit of a messer; methinks TCV mounted on the engine block near the starter motor about £100 easy diy fit or VNT sticking on the turbo (far more serious)

I was under the impression that my engine is not a D5 as all my paperwork from logbook to original invoice states that it is a 2.4d where others say D5, probably no difference, but back to problem.
I have no idea what these two items you mentioned are, but is there anyway of testing them myself, and whats the worst case scenario with the VNT? what would happen when finally gave up.I ask this as Keep changing my mind on getting a new car, either another XC90 or the new shape V70, dont think the V60 is big enough for 3 kids etc. Wife does not want to go back to a normal car and wants to stay 4x4 but i would only want to get an R design as a replacement.
Thanks
Paul