S40 (New) Engine 2.0D : Glow plug confusion ?

[Gremlin682001]

Hi All
I’m having a few issues here and wonder if you can clarify something re the glow plug operation for me please ?
I’ve been advised a few years ago by the main stealer that the glow plugs remain in operation on the D4204T engine to aid in fuel economy and emissions control, I’m also being told now that the glow plugs have no role in the continuous operation of the engine and once the engine is started that’s their role finished until the next start.
I’m having misfires thoughout the rpm range, originally started at 1800rpm and now happens lower down the range, occasional hesitation in acceleration from a standing start and more pertinent black smoke from exhaust which I sunburnt diesel I’m guessing which would tie in with reduced fuel economy and poor acceleration.
I was leaning towards the High pressure fuel pump failing or a glow plug issue ?

Many thanks for reading and any feedback regarding this issue.

Cheers

[Zebster]

Aren't all the D4204T variants VEA engines fitted to later (post 2013) models? If so then I'd suggest that the EGR valve is failing to close, probably due to soot build up.

[dingov70]

Afternoon , Many modern diesels have a function known as post heating , once the engine is running a reduced voltage is supplied to the glowplugs depending upon engine temperature to help reduce emissions . Fords have this ( same system !) going back to the mid 90's

The misfire / black smoke is most likely the result of an injector failing . The likeliest reason is the needle sticking inside the injector body and not sealing off the injector nozzle fully. One question , does the engine require a lot of turning over before it runs ? . This can also be a symptom of a failing injector , a leak back test can quickly generate a definitive result . There are many write up's on the forum about doing this . If you are not confident to do it yourself , i am sure there is a forum member close by who can / will help you . A high pressure pump issue will very very quickly let you know it has given up . PLEASE be aware that the high pressure pump & rail system work at around 2000 bar ( x14 to get p.s.i. ) so be very careful is working on injection system . Once the injection system is known to be OK , you then move onto EGR valve & butterfly valves or whatever they call them nowadays in he inlet system

Good luck , keep us posted

Steve

[Gremlin682001]

Many thanks for your replies,
I forgot to mention that I’d changed the injectors last summer, there’s also no issue with starting, first time but I’ve got to be honest, thinking about starting..... she starts but it’s not a smooth gentle start, it’s almost like there’s an imbalance of something, like fuel or air but there’s no issue showing on the diagnostics, would the egr cause that kind of issue ?
I’ve got a mechanic/technician coming round late on to have a look so hopefully will be able to advise further.

Cheers

David

[Gremlin682001]

The technicien/mechanic believes the turbo is ingesting oil and that is the reason for the black smoke and reduced power/misfiring and reduced fuel economy. When he revved it hard there’s certainly was an excessive amount of black smoke and a black mark on the ground.
The turbo is clean externally but cannot rule out an internal failure so recommends an inspection and potential replacement.

Would be very grateful if anybody has any recommendations in the Surrey/Hampshire area for a recon fitted turbo specialist as after seeing where it’s located it’s beyond my capabilities to replace ?

Many thanks again for your replies and will post back further updates on this defect.

Cheers

David

[dingov70]

Hello again OK you have swapped the injectors , where the new / re-con or just second hand ? . I would still perform a leak off test , the tolerances in modern injectors is incredibly small and the smallest contaminant can cause problems .

If the turbo was ingesting oil sufficient to generate black smoke , I would expect the engine to run away ( youtube - runaway diesels ) , the oil is added to the airstream on the inlet side & burnt as unregulated fuel hence the term runaway .

Oil leaking from the exhaust side will produce a blue grey haze , getting thicker as the engine revs & gas temp rises , burning oil off in the turbo / exhaust .

Another area to look into is the EGR valve & any flexible hoses on the inlet system , a smoke check can quickly detect any leaks , I see you were having EGR issues back in Feb , so this may well be a suitable route for further investigation

Here's hoping

[Gremlin682001]

Afternoon, apologies for the late reply.
The injectors were new from PF Jones and did not need to be coded, worked straight out of the box.
When I had the egr issue it didn’t cause the hesitation/jerks that I’m getting now.
I’m increasingly suspicious of the turbo, I’ve been told by a number of people that the usual lifecycle for a turbo is about 100to 1.500k miles so I’m passed that point so wouldn’t be at all surprised

[Gremlin682001]

Hi All,
The cars booked in with an indie turbo specialist in Portsmouth on the 11th for an inspection and poss replacement.
I`ve noticed that theres quite a bit of carbon buildup on the throttle body which I`ve managed to get most of it and also that theres quite a bit of stick on the flap, not a smooth operation at all, looking at replacing the throttle body because of it, question is, does the ecu need to trained/reset in order to read the new throttle body at all ?
Will post results of turbo inspection in due course.
Thanks all

[Gremlin682001]

The turbo specialist has reported back, did a smoke check on all the pipe work and found a significant leak on the air intake charge pipe, coked vanes on turbo caused by unburnt fuel preventing proper movement(no idea what he meant by that but as their variable vanes I guess they move.....) resulting in excess fuel just being chucked out the exhaust as black smoke, new pipe and recon turbo being fitted and will hopefully solve the issue.
Just to summarise the faults if anybody has similar symptoms
Decreased fuel economy, black smoke, reduced engine power, (will get to 70 but very slow doing it) no faults on Vida/dice unless you floor it and force a underboost code, hesitation and jerking through acceleration/load/hills (customer message on Vida but no fault codes)

Get a smoke test done on all the pipe work which may prevent you having to get a recon turbo fitted.

Cheers

Gremlin