Chris
It's actually a truckload cheaper than a lot of current diesel utes, which can be up to 20 grand to fix in this way. But yes, ouch. Unfortunately if you dig into the issue, water contamination of diesel fuel systems is a substantial risk for a number of reasons. Had I but realised.
Anyhoo, after much pondering about cost vs value of the car and my needs for the immediate future, I've asked John to clean out the fuel system, check the fuel pump pressures and not replace unless out of spec, and source second hand injectors which will be checked by the diesel mech before use. This should keep the costs below 3k by my estimates, which is more in keeping with what the car's worth.
If it works perfectly I'm on a winner, if it behaves just like it did before it isn't a deal breaker and I'll probably hang onto it for a few more years either way.
carnut222
The old diesels used to have water separators. Going back a few years to my parent's Oldsmobile diesel LOL. Do newer diesels have these?
timbo
Lots of the 4wd guys fit at least 1 aftermarket water trap. You can get some decent kits from places like cooldrive/Jas oceania/auto electrical suppliers
Chris
As @timbo implies, they aren't standard nowadays. Manufacturers vary on their opinions but many don't recommend them. But then these are the same manufacturers who don't want to know you when your fuel system gets trashed by water contamination.
Vee_Que
The filters have water traps inbuilt on modern diesels in my experience, hiluxes, dmaxes, Colorado's, vw diesels filters have the trap effect too, etc etc, I've seen them on mercs, but I'm unsure what the filter looks like in the Volvo, I'd imagine it does have the water trap effect with the pick-ups both at the top and a gap in the bottom of the bowl to the filter.
Sucks, what diesel workshop is doing the work?
Ex850R
Vee_Que;c-139591 wroteThe filters have water traps inbuilt on modern diesels in my experience, hiluxes, dmaxes, Colorado's, vw diesels filters have the trap effect too, etc etc, I've seen them on mercs, but I'm unsure what the filter looks like in the Volvo, I'd imagine it does have the water trap effect with the pick-ups both at the top and a gap in the bottom of the bowl to the filter.
Sucks, what diesel workshop is doing the work?
@Vee_Que, what would you recommend for the S80? And where can it go is the next question.
I send the missus to a big, newish BP that has big truck pump area so to get good fuel.
Chris
Voldat use a guy just around the corner, don't know his business name @Vee_Que .
@Ex850R , I've been using a relatively new BP servo but without truck pumps. My issue was present before I got the car and hasn't got worse so I don't really know how much of the contamination is recent.
It does suck but that's the risk when you buy used. That said, it would have helped if Silverstone had been willing to tell me about the car's history instead of talking bullshit about the privacy act FFS.
What I didn't realise before now is how easily water gets into diesel, how crap grows in the fuel system once water is there and the fine tolerances of modern diesel fuel systems that mean damage is easy to do.
Ex850R
So the antibacterial additive is good idea?
As well as regular cleaner additive.
Ex850R
Chris
Others are probably better qualified than I am to comment on additives, but the reading I've been doing since this diagnosis suggests the growth of biological crap happens because of the presence of water. That indicates prevention is the most important thing.
It does seem that some sort of biocides are used in the clean up process in my situation.
Ex850R
I'm concerned for our D5 now.
Chris
You may be fine Les. I'm not blaming Volvo, and mine has a clear symptom that sadly wasn't obvious enough on a test drive or inspection. It was one of those things where familiarity led to a 'that's odd' moment.
For perspective, while my car had a dealer history it did have one service done very late because the PO went on km not time. It also had some tell tale signs that he wasn't particularity careful either. So it was a good enough example but far from immaculate. Liked I said earlier, my theory is the PO gave zero shits about where he fueled it.
There are plenty of D5s with lots of trouble free km on them and a few that haven't fared well. Like most everything.
Vee_Que
The old adage with diesels is to make sure it's full to the top to not allow algae to have room to grow. Applies better to trucks and buses with 2-400L tanks, but applies to cars too, running them dry doesn't help them either.
For all you know, the previous owner ran it on petrol, although I've known of diesel utes etc with common rail that have issues, then run 3-5% petrol by accident in a full tank and it solves issues! Go figure.
Chris
Maybe I should try petrol :) But yes, it does seem good habits and hygiene are important for diesels
timbo
There is a bit of a water trap with a drain on the bottom of the fuel filter on diesel Volvo's, but It doesn't have a level sensor/warning light. It's listed in the service schedule to drain it every 15,000kms
egads (she/her)
That’s a really long interval for a water small water trap. The one in the navara asked to be emptied which was super handy. Gave a prompt to avoid the last places you got fuel and to chuck in some biocides
Chris
Update: injectors replaced with used ones, checked as in spec and cleaned, changed fuel filter and oil (due to suspected fuel leakage into the oil - old injectors were overfuelling and the oil sensor was triggering), did a DPF burn as it was getting full. Voldat didn't clean the fuel system out in the end as a sample appeared to be OK. Also left the fuel pump alone as it was outputting the right pressures.
End result, it's actually slightly worse now. In addition to the miss at 60 and 80 there's what feels like an underlying roughness or juddering to the acceleration unless you plant it. Very evident at 70 km/h and 1,400 RPM on mild to mid throttle. It does seem a little smoother when cold and at the moment isn't missing at 1,500 when in Park or Neutral like it was, but that's the only good news.
To add to the joy, my son told me the V40 isn't running right. Jump in and it's misfiring too - under load at lower revs. Geez....
Chris
Soooo John reckons the next (and only) stop is to do the fuel pump. It's outputting the right pressures but the theory is it's damaged through the fuel contamination. At this point I'm not sure whether to throw in the towel or not.
Philia_Bear
It could also be the fuel pump in the tank or the fuel sensors or a few other things
Either you replace everything or just give up
Tbh... I'd flog it off at the auctions as is and move on
Chris
I hear ya @Philia_Bear
I don't want to dump it but if I'm being realistic I feel like I'm on a hiding to nothing. More than happy to do the pump (and anything else within reason bearing in mind what the car's worth) but I'm no closer to a solution 2 years down the track, so...
