Rough running Tdi

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R

Roy Hann

Guest
Just returned from a 3,200 mile round-trip of Europe. Serviced the '97
Disco Tdi (180,000 miles on it) before leaving. Running rough and faltering
for the last couple of hundred miles. Fuel consumption spot-on expectation
(~500 miles/tank). Starts easily. No smoke or foul odour in the exhaust.
No loss of coolant or oil. Water temp OK. ECU reports no faults.

A fouled or worn injector seems a plausible explanation, but the problem
appeared suddenly (meaning I didn't notice a problem until it faltered the
first time and it hasn't got worse since then). Is there anything else
*simple* I can check before paying someone who knows what they're doing?

Roy


 
On Sat, 26 Aug 2006 19:09:47 +0100, "Roy Hann"
<[email protected]> wrote:

>Just returned from a 3,200 mile round-trip of Europe. Serviced the '97
>Disco Tdi (180,000 miles on it) before leaving. Running rough and faltering
>for the last couple of hundred miles. Fuel consumption spot-on expectation
>(~500 miles/tank). Starts easily. No smoke or foul odour in the exhaust.
>No loss of coolant or oil. Water temp OK. ECU reports no faults.
>
>A fouled or worn injector seems a plausible explanation, but the problem
>appeared suddenly (meaning I didn't notice a problem until it faltered the
>first time and it hasn't got worse since then). Is there anything else
>*simple* I can check before paying someone who knows what they're doing?
>
>Roy

injectors can suddenly go wrong. I had one suddenly stick open as i
drove up a hill.

Could be something else in the fuel system. Have you checked the fuel
filter? I have trouble with the pickup pipe getting blocked with crap
gradually and you notice suddenyl when it reaches a certain point.

Maybe worth changing the fuel filter and funning a tank of fuel
through with injector cleaner in it and see what happens to the
problem.

 
Tom Woods <[email protected]> uttered summat worrerz funny
about:
> injectors can suddenly go wrong. I had one suddenly stick open as i
> drove up a hill.
>
> Could be something else in the fuel system. Have you checked the fuel
> filter? I have trouble with the pickup pipe getting blocked with crap
> gradually and you notice suddenyl when it reaches a certain point.
>
> Maybe worth changing the fuel filter and funning a tank of fuel
> through with injector cleaner in it and see what happens to the
> problem.

Fuel pickup from the tanks also rot through on Discos and Rangies and can
allow a small amount of air to be sucked in whilst showing no signs of a
leak of fuel as it only happens when the pump pulls air and fuel through the
pickup. That little gem gave me the run around for 2 years or so until it
got to the stage you are at prior to the symptoms you now have it resulted
in prologed cranking to start if the vehicle had been left a while as the
fuel was able to syphon all the way to the back in to the tank other than
what was left in the filter. This was on a 1990 Rangie around 2 years ago.
May be wrong but another thing to consider if you start to draw blanks.

Lee D


 
Chuck some injector cleaner in and see if that sorts it.

TonyB


 
"TonyB" <[email protected]> wrote in message
news:[email protected]...
> Chuck some injector cleaner in and see if that sorts it.

I think I will do that. It hadn't occured to me right away because I have
always assumed that the various concoctions that are sold to put in your
fuel tank are just snake oil. At this point it couldn't hurt though.

Roy


 
On Mon, 28 Aug 2006 11:27:09 +0100, "Roy Hann"
<[email protected]> wrote:

>"TonyB" <[email protected]> wrote in message
>news:[email protected]...
>> Chuck some injector cleaner in and see if that sorts it.
>
>I think I will do that. It hadn't occured to me right away because I have
>always assumed that the various concoctions that are sold to put in your
>fuel tank are just snake oil. At this point it couldn't hurt though.

worth doing the fuel filter too like i suggested. they only cost a few
squid and are an easy job.
 
Roy Hi,

I have found that my 200Tdi started feeling more lively again and reduced
its fuel consumption after changing the fuel filted (but then again it was
not changed for more than 50.000 Km due to a mistake)

Injector cleaners do a pretty good job and a few diesel additives are worth
their money also.

If you decide to change your fuel filter remember to prime it first with
fresh diesel before putting the new cartridge in. This will save priming the
whole system so as to remove the air babble. Tdi engines are supposed to be
self priming but if you do prime the fuel filter this will also help the
engine.

Take care
Pantelis

"Roy Hann" <[email protected]> wrote in message
news:[email protected]...
> "Tom Woods" <[email protected]> wrote in message
> news:[email protected]...
> > worth doing the fuel filter too like i suggested. they only cost a few
> > squid and are an easy job.
>
> Yup. Thanks for that suggestion too.
>
> Roy
>
>


 
"Pantelis Giamarellos" <[email protected]> wrote in message
news:[email protected]...
> Roy Hi,
>
> I have found that my 200Tdi started feeling more lively again and reduced
> its fuel consumption after changing the fuel filted (but then again it was
> not changed for more than 50.000 Km due to a mistake)

I will be changing the fuel filter shortly, per the advice here, although it
was replaced less than six months ago (so probably less than 9,000 miles).

> Injector cleaners do a pretty good job and a few diesel additives are
> worth
> their money also.

Fair enough. I have already suspended my disbelief long enough to tip some
into the tank this morning. We will see...

> If you decide to change your fuel filter remember to prime it first with
> fresh diesel before putting the new cartridge in. This will save priming
> the
> whole system so as to remove the air babble. Tdi engines are supposed to
> be
> self priming but if you do prime the fuel filter this will also help the
> engine.

Today is a "suit and tie day". That'll have to wait till tomorrow. Thanks
for the tip.

Roy


 

"Roy Hann" <[email protected]> wrote in message
news:[email protected]...
> "Pantelis Giamarellos" <[email protected]> wrote in message
> news:[email protected]...
>> Roy Hi,
>>
>> I have found that my 200Tdi started feeling more lively again and reduced
>> its fuel consumption after changing the fuel filted (but then again it
>> was
>> not changed for more than 50.000 Km due to a mistake)
>
> I will be changing the fuel filter shortly, per the advice here, although
> it was replaced less than six months ago (so probably less than 9,000
> miles).
>
>> Injector cleaners do a pretty good job and a few diesel additives are
>> worth
>> their money also.
>
> Fair enough. I have already suspended my disbelief long enough to tip
> some into the tank this morning. We will see...
>
>> If you decide to change your fuel filter remember to prime it first with
>> fresh diesel before putting the new cartridge in. This will save priming
>> the
>> whole system so as to remove the air babble. Tdi engines are supposed to
>> be
>> self priming but if you do prime the fuel filter this will also help the
>> engine.
>
> Today is a "suit and tie day". That'll have to wait till tomorrow.
> Thanks for the tip.
>
> Roy
And don't forget to drain the sedimentor as well or the jellyfish will get
upset ( assuming you have the buggers too)
Derek

Its only unethical if you get caught


 
In message <[email protected]>
"Roy Hann" <[email protected]> wrote:

> "Pantelis Giamarellos" <[email protected]> wrote in message
> news:[email protected]...
> > Roy Hi,
> >
> > I have found that my 200Tdi started feeling more lively again and reduced
> > its fuel consumption after changing the fuel filted (but then again it was
> > not changed for more than 50.000 Km due to a mistake)
>
> I will be changing the fuel filter shortly, per the advice here, although it
> was replaced less than six months ago (so probably less than 9,000 miles).
>

It should be changed at 6,000 - along with the other filters, and
of course the water trap on the fuel filter should checked regulary.....
like everyone does ;-)

> > Injector cleaners do a pretty good job and a few diesel additives are
> > worth
> > their money also.
>
> Fair enough. I have already suspended my disbelief long enough to tip some
> into the tank this morning. We will see...
>
> > If you decide to change your fuel filter remember to prime it first with
> > fresh diesel before putting the new cartridge in. This will save priming
> > the
> > whole system so as to remove the air babble. Tdi engines are supposed to
> > be
> > self priming but if you do prime the fuel filter this will also help the
> > engine.
>
> Today is a "suit and tie day". That'll have to wait till tomorrow. Thanks
> for the tip.
>
> Roy
>
>

Richard
--
www.beamends-lrspares.co.uk [email protected]
RISC-OS - Where have all the good guys gone?
Lib Dems - Townies keeping comedy alive
 
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