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Mechanictrackworld
2012 vauxhall combo 1.3 diesel.
I was driving along and all of a sudden it completely cut out and the oil pressure warning light came on. Now she won't start, sounds perhaps like it's cutting the diesel to protect itself. Nothing obvious seems to be a miss, I assume it needs a computer plugging in. Does anyone have an idea what could have happened? Thanks in advance.
start with the simple things first. has it run out of fuel? get the aa to come have a look, they can do a lot of diagnostics in a short amount of time.
Key info - did it cut out and THEN the oil pressure light came on, or did the oil pressure light come on first?
Do you do lots of short journeys?
I think this is the same engine add the fiat doblo.
It has a chain driven cam, tensioned by oil pressure. The dpf regen system works by increasing the fuelling. If you don't get complete regens then the extra diesel contaminates the oil, the pressure drops and the timing chain starts slapping, this grinds more aluminium filings into the oil making the situation worse. Eventually the lack of pressure on the chain tensioner allows the chain to skip and the engine lunches itself.
Sorry.
My wife's business destroyed three doblos in a few years. None of them made it more than 95k miles.
It has diesel and oil I'm pretty sure it's not that.
As for the light,I think it just died, then I looked at the at the dash and the oil pressure light was on, it happened very suddenly, luckily I was going slow in a quiet street.
I do courier work so kind of do lots of short journeys yet at the same time the van keeps temperature, so I don't know if it realises but lots of low speed driving. Yes I believe mine is the same as the Doblo. I have read stories about the DPF.
Little update I bought a obd scanner.
P2453 DPF related.
P0087 fuel pressure issues.
Hopefully she lives to fight another day. I had around 75000 miles
clear the codes and try starting it again, probably some won't reappear. I doubt a dpf would stop a car from starting, have you checked the fuel pump fuse
I tried that, now I don't know if my scanner isn't very good but it said failed. When I read it again they don't appear but the van still shows the lights and it won't start, nothing has changed.
In the mean time I have found a broken pipe that leads to the DPF sensor. I can't the buggering clip off at the minute.
Also checked the fuse it's good, thank you.
Yeah I'm also a bit perplexed to how it's all related. Although DPF causes issues it should essential run without it.
https://m.imgur.com/a/ctJ4Eyv photos of said pipe.
My concern is the low pressure codes though that maybe a system of a stall.
Can you on your obd see things like fuel rail pressure and crank signal?
Reckon the chain might've gone - my one imploded on me at a similar mileage, was going to cost about £1,500 for a rebuild, with the caveat that until they took it apart the didn't know how much needed to be re-built.
Burst DPF hose wouldn't cause a sudden cut-out with no prior problems.
Loss of fuel pressure, is either something gone wrong on the low pressure side, or an electrical/mechanical fault with the high pressure side.
Easy check for low pressure is disconnect one of the plastic fuel pipes at the filter, and turn the ignition on. If fuel pours out, the low pressure side is fine.
Normally I'd look at live data to see if the camshaft sensor is seeing the cam shaft turning, but that needs some reasonable diagnostic kit.
Easiest option to see if the timing chain has completely failed, is either take the big bung out the timing cover that lets you access the camshaft sprocket bolt, or one of the camshaft timing tool blanking plugs (one front, and one rear) and see if the cam is still spinning.
If the cam is still spinning, I have seen the high pressure pump drive on the cam shaft randomly slacken off, or it could be the pump itself has suddenly failed (not very likely), or it may even be an electrical failure. The problem with generic EOBD code readers, is they don't always read all codes, and the lack of live data cripples their usefulness.
It could be the timing chain has worn and jumped, which is rarely terminal on these, but that wouldn't explain the loss of fuel pressure code.
That code could have been registered months ago though, and either be spurious or a red herring. If it's not retriggering (which it isn't), i would ignore it for now
Would spraying some sure start into the intake whilst cranking over be an idea? If it works you know it's a fuelling issue, if not it's likely to be getting air in.
Easy check for low pressure is disconnect one of the plastic fuel pipes at the filter, and turn the ignition on. If fuel pours out, the low pressure side is fine.
That's dependent on there being a lift pump, none of my 3 diesels have had one.
Thinking about it, there could be a fuel kill switch that's spuriously triggered, my Civic had one behind the glove box that needed to be reset in an accident and I may or may not remember something about them occasionally acting up. Not sure if that was common to Vauxhalls as well (it was the Isuzu 4EE2 engine) but could be worth checking.
That’s dependent on there being a lift pump, none of my 3 diesels have had one.
All modern diesels have a lift pump, but I suspect the keyword you forgot was electric.
Anyway, these have an electric lift pump.
Unlike a lot of people who post about possible problems and solutions because they once had some vaguely similar problem on an unrelated vehicle, I've actually worked on lots of these vans.
The only ones that didn't have an electric lift pump were the Isuzu 1.7 engined vans.
Well I took it to a garage and the long and short of it, it's dead. They say the timing chain has snapped.