V50 running like a dog...intermittently

[XcOM]

Originally Posted by blandit

thanks mate, im going to need all the luck i can get with this one.

Just drove it round the block and on the deceleration its making a metallic grinding noise noise until you press the clutch ten lumpy tickover. if you accelerate the noise also stops, so im thinking could this be engine mounts? could that cause the engine to "excessively wobble" on idle occasionally? or am i trying to hard to find a problem?

ive bought a new set of glow plugs so will tackle that tomorrow, and from what i can see, egr needs to come off so i will make a proper blanking plate for that whilst im in there. then its onto the smoke testing for leaks from turbo upward. i will also try and leak test the vacuum lines before replacing them but its only like £2 per meter for some fancy coloured stuff!

Did you do anything to the Clutch/DMF? that sounds like it's tearing itself apart, there is something lose or as you say the mounts are gone which is putting it out of alignment, any decent indy garage should be able to check that for you, would be much cheaper than main stealers, although mine isn't to bad for stuff like this, they are happy to barter.

[blandit]

thanks again all. so today proved fruitless, EGR is working perfectly as i ran it without the silver pipe on, revved it and the EGR opened and closed in all the right places. I did the screwdriver to engine and ear trick, each cylinder sounds the same, cant here a missfire from the exhaust side either so i dont think it can be dropping a cylinder on idle anymore.

Completed smoke test and one leak became apparent, this was one of the boost lines to the vacuum solenoid thing....this was replaced. Issue remains. took it for a spin and now its developed another issue!!!!!

The gearbox sounds very very "grindy" you can here the cogs slapping/grinding against eachother is the best way i can describe it. A guy on youtube has the same issue Here so, now im reluctant to drive the car.

I have taken a video on my gopro but its currently uploading, the vid is of the tickover with the EGR pipe off, you can see the engine shaking itself to death, which can be felt through the car, feels like driving down a cobbled road.

I have managed to located an independent volvo specialist failry close by so im going to book it in with the next week and see where we go, could be a new gearbox i recon but i at least want to get the DMF checked, none of the gearbox/clutch was touched by the way.

One thing i forgot to mention is i did the cabin filter too.....after a tonne of swearing and cups of tea, what a pig of a job.

[XcOM]

Might be worth while driving it to get the gearbox oil warm, then drain and change it, when you drain it run it though a siv or something and see if there are metal parts, if there is it's not good news.

Of if the oil is lumpy or gloopy they it could just be bad oil not lubricating the gears.

[blandit]

yeah thats a good shout actually, didnt even think of that. I will try this tomorrow if i get time!

here is the vid of the engine shaking itself and the car!

https://www.youtube.com/watch?v=WNOAeMdsmfk

[blandit]

Ok quick update on my issues.

Rough Idle: the diesel specialist and Volvo indi garage think its injector related so have taken the injectors out and they have gone off for testing, awaiting results.

Gearbox: They think a bearing has gone or the drive shaft bearing has gone which is making the noise, they will be changing gearbox oil and testing once injectors are back and going from there.

This is going to be expensive.

[Dangerousdave]

If it's just an injector that's a result, but I'd hate to be needing a box..

Hope that's just as straightforward...

[blandit]

Update#2:

Injectors are back from being tested, they are 100% fine.

Gearbox: Oilchange has been completed, gearbox is as it should be again.

they stuck a new fuel filter in to see if that resolves the issues, but it didnt. so now they want to go down the ECU/wiring route ffs. He said the DMF sounds like its wearing but doesnt think that's the issue.

what the hell, i simply cannot afford to take it to volvo as they are too expensive. we buy any car rip offs have quoted £1440 for it!!!! its on 75k now and has FSH, that is crazy.

bad times everyone, bad times.

[x DTR x]

Originally Posted by blandit

yeah thats a good shout actually, didnt even think of that. I will try this tomorrow if i get time!

here is the vid of the engine shaking itself and the car!

https://www.youtube.com/watch?v=WNOAeMdsmfk

Have you checked the condition of the engine mounts? Particularly the one under the battery and the lower torque mount that connects between the gearbox and subframe as they are not obvious to see unlike the large oil filled one on the drivers side! Also, i'd still look at cleaning the throttle or making sure it's not warped if not already done so, easy enough job and at least you can tick it off the list so to speak!

[blandit]

Hi Mate,

I haven't checked the mounts yet but i will do as soon as i get her back. Im still not 100% convined its a missfire you know as the engine moves alot when revving, so the shaking and what appears to be a misfire could be a lose engine.

I have cleaned the throttle body when i did the EGR, i also cleaned the 2 sensors within the throttle body. I havent taken MAF out yet... are there any other "air/fuel" related sensors i should be aware of?

Thanks again.
Mike

[blandit]

OK so the plot thickens. . . .

been into Volvo today, they had it for 5 hours and have advised there is nothing wrong with the engine, they think "it could be the DMF."

I have changed the throttle housing for a new one, new fuel filter, fuel additive, egr blanked and un blanked the issue remains. The good news is VIDA didnt pick up any misfires, all sensors are within parameters as are the injectors.

they think the same as me and its more of a shake than a misfire. Not sure what else to check with this, but i dont think its the DMF as it pulls fine above 1.2k revs, just below 1.2k revs it rears its head....its now doing it all the time rather than when warm so its less intermittent but the shaking has reduced slightly.

I have tested the EVAP system and no leaks can be found, i havent managed to check the intake system as yet, but, as all sensors i,e Lmbda 1+2 were reading fine i dont think it can be unregistered air.

any ideas????