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fiesta courier diesel problem
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CarGuru > Open discussion > fiesta courier diesel problem 16 April 2005 21:27:20

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fiesta courier diesel problem

Griffmonster 14 April 2005 17:36:10
 I have an unsolved problem with my fiesta van concerning a loss of
power. It starts no problem, but once the engine is warm it starts to
lose power. When accelerating there is little response with a lot of
black smoke from the exhaust until sufficient revs are reached when
the van suddenly starts pulling as it should. As you change up this
happens again in the next gear. 5th gear is a complete no-go. Try it
and the van just slows down. A mechanic has advised that he thinks it
is the fuel pump but I am suspicious and do not want to shell out for
this until I am a little more certain that this could be responsible.
Add comment
Mungo "two sheds" Toadfoot 14 April 2005 19:31:23 permanent link ]
 griffmonster wrote:> I have an unsolved problem with my fiesta van concerning a loss of> power. It starts no problem, but once the engine is warm it starts to> lose power. When accelerating there is little response with a lot of> black smoke from the exhaust until sufficient revs are reached when> the van suddenly starts pulling as it should. As you change up this> happens again in the next gear. 5th gear is a complete no-go. Try it> and the van just slows down. A mechanic has advised that he thinks it> is the fuel pump but I am suspicious and do not want to shell out for> this until I am a little more certain that this could be responsible.

It's getting too much fuel at low revs, so...a temperature sensor? I don't
know a lot about the cold-start workings of diesels but it sounds reasonable
to me.

Also, the electrical connectors on Fiesta sensors are prone to corrosion
which is not obvious without seperating them, I've found, so it's worth
seperating and cleaning every one you can find.

Si


Add comment
Moray Cuthill 14 April 2005 21:32:40 permanent link ]
 
"griffmonster" <griff.chamberlain@­stats-nnc.com> wrote in message
news:a285ec70.05041­40536.4f564d3d@posti­ng.google.com...>I have an unsolved problem with my fiesta van concerning a loss of> power. It starts no problem, but once the engine is warm it starts to> lose power. When accelerating there is little response with a lot of> black smoke from the exhaust until sufficient revs are reached when> the van suddenly starts pulling as it should. As you change up this> happens again in the next gear. 5th gear is a complete no-go. Try it> and the van just slows down. A mechanic has advised that he thinks it> is the fuel pump but I am suspicious and do not want to shell out for> this until I am a little more certain that this could be responsible.

What age is the van?

I'm guessing it's one off the newer ones with an EGR valve, as that's the
symptoms they produce when faulty.

Standing at the front off the van with the bonnet up, on the right hand end
off the inlet manifold, there is a large round valve, with a vacuum hose
coming off it. That's the EGR valve. If you disconnect the small vacuum
hose, blank the hose and take it for a run, the van should run far better.
If this cures it, leaving it disconnected won't do any harm (well it may
smoke slighlty more, and you might squeeze a couple extra HP out the engine)
However it may be that the EGR valve has stuck open, in which case, if you
take it off, it'll be quite obvious that it's stuck open. You can either fit
a new one, or make up a blanking plate.


Add comment
Chris Street 15 April 2005 02:59:19 permanent link ]
 On Thu, 14 Apr 2005 18:32:40 +0100, Moray Cuthill wrote:
"griffmonster" <griff.chamberlain@­stats-nnc.com> wrote in message > news:a285ec70.05041­40536.4f564d3d@posti­ng.google.com...>>I have an unsolved problem with my fiesta van concerning a loss of>> power. It starts no problem, but once the engine is warm it starts to>> lose power. When accelerating there is little response with a lot of>> black smoke from the exhaust until sufficient revs are reached when>> the van suddenly starts pulling as it should. As you change up this>> happens again in the next gear. 5th gear is a complete no-go. Try it>> and the van just slows down. A mechanic has advised that he thinks it>> is the fuel pump but I am suspicious and do not want to shell out for>> this until I am a little more certain that this could be responsible.>
What age is the van?>
I'm guessing it's one off the newer ones with an EGR valve, as that's the > symptoms they produce when faulty.

IF it's got the new TDCi engine then yes it's almost certainly the EGR.
It's a common problem on the Focus diesels as well.>
Standing at the front off the van with the bonnet up, on the right hand end > off the inlet manifold, there is a large round valve, with a vacuum hose > coming off it. That's the EGR valve.

Modern ones are probably electrically operated - there doesn't appear to be
a vacuum hose on mine.
If you disconnect the small vacuum > hose, blank the hose and take it for a run, the van should run far better. > If this cures it, leaving it disconnected won't do any harm (well it may > smoke slighlty more, and you might squeeze a couple extra HP out the engine)> However it may be that the EGR valve has stuck open, in which case, if you > take it off, it'll be quite obvious that it's stuck open. You can either fit > a new one, or make up a blanking plate.

This is the common fix for the Focus and works very well as you say.
Add comment
Tim.. 15 April 2005 12:54:39 permanent link ]
 
"Chris Street" <venus.ngfb@chris-s­treet.demon.co.uk> wrote in message
news:1250zac55w9dx$­.1pv8crmgj0573$.dlg@­40tude.net...> On Thu, 14 Apr 2005 18:32:40 +0100, Moray Cuthill wrote:>
"griffmonster" <griff.chamberlain@­stats-nnc.com> wrote in message> > news:a285ec70.05041­40536.4f564d3d@posti­ng.google.com...> >>I have an unsolved problem with my fiesta van concerning a loss of> >> power. It starts no problem, but once the engine is warm it starts to> >> lose power. When accelerating there is little response with a lot of> >> black smoke from the exhaust until sufficient revs are reached when> >> the van suddenly starts pulling as it should. As you change up this> >> happens again in the next gear. 5th gear is a complete no-go. Try it> >> and the van just slows down. A mechanic has advised that he thinks it> >> is the fuel pump but I am suspicious and do not want to shell out for> >> this until I am a little more certain that this could be responsible.> >
What age is the van?> >
I'm guessing it's one off the newer ones with an EGR valve, as that's
symptoms they produce when faulty.>
IF it's got the new TDCi engine then yes it's almost certainly the EGR.> It's a common problem on the Focus diesels as well.> >
Standing at the front off the van with the bonnet up, on the right hand
off the inlet manifold, there is a large round valve, with a vacuum hose> > coming off it. That's the EGR valve.>
Modern ones are probably electrically operated - there doesn't appear to
a vacuum hose on mine.>
If you disconnect the small vacuum> > hose, blank the hose and take it for a run, the van should run far
better.> > If this cures it, leaving it disconnected won't do any harm (well it may> > smoke slighlty more, and you might squeeze a couple extra HP out the
engine)> > However it may be that the EGR valve has stuck open, in which case, if
take it off, it'll be quite obvious that it's stuck open. You can either
a new one, or make up a blanking plate.>
This is the common fix for the Focus and works very well as you say.

I havent tried this on the Focus, but I am told that it doesnt work and the
ECU flags a fault if the EGR valve is blanked with a solid plate, or the
hose is dosconnected. -

There is no valve lift sensor on these and the ECU regulates the degree of
EGR by looking at the MAF sensor reading dropping as it opens the EGR.
Obviously if the EGR valve cannot pass any exhuast gas the MAF reading
doesnt drop and the ECU knows something funny is going on.

There is no choice but to have a properly functioning EGR valve on the
TDCi's.

Leaky PCV hoses cause it to throw a wobbly too.

Tim..


Add comment
Griff Chamberlain 15 April 2005 19:49:06 permanent link ]
 The van is R reg - 98 model. I have had a new EGR valve fitted a few
weeks ago and this did not cure the problem

Add comment
Griff Chamberlain 15 April 2005 19:51:32 permanent link ]
 The van is R reg - 98 model. I have had a new EGR valve fitted a few
weeks ago and this did not cure the problem

Add comment
Moray Cuthill 15 April 2005 21:14:46 permanent link ]
 
<griff.chamberlain@­stats-nnc.com> wrote in message
news:1113580292.235­639.158390@l41g2000c­wc.googlegroups.com.­..> The van is R reg - 98 model. I have had a new EGR valve fitted a few> weeks ago and this did not cure the problem>

Have you tried disconnecting the vacuum pipe from the valve as I suggested
before?
It could be that the electrically operated vacuum valve is sticking, and
disconnecting the hose from the EGR valve will prevent it from operating the
EGR valve.
It's the first thing I'd check before looking else where. It only takes a
couple minutes to disconnect and blank off, and a short road test will show
if it's worked or not. Also the EGR valve doesn't operate as much when the
engine is cold, which is why it runs fine to start with.


Add comment
Chris Street 15 April 2005 22:20:26 permanent link ]
 On Fri, 15 Apr 2005 08:54:39 +0000 (UTC), Tim.. wrote:>
I havent tried this on the Focus, but I am told that it doesnt work and the> ECU flags a fault if the EGR valve is blanked with a solid plate, or the> hose is dosconnected.

There are a lot of Foci with a blanked EGR that have no problems, and no
DTC codes appearing either.
There is no valve lift sensor on these and the ECU regulates the degree of> EGR by looking at the MAF sensor reading dropping as it opens the EGR.> Obviously if the EGR valve cannot pass any exhuast gas the MAF reading> doesnt drop and the ECU knows something funny is going on.>
There is no choice but to have a properly functioning EGR valve on the> TDCi's.

Considering that many have been driving for over a year with a stuck valve
because Ford couldn't make them work I'd say it doesn't upset them all that
much.
Add comment
Griff Chamberlain 16 April 2005 14:40:12 permanent link ]
 I have disconnected the vacuum pipe and the difference is amazing - no
black smoke and the van is well-responsive. To think that the garage
mechanic was quoting over £500 to replace the fuel pump as a cure!!!.
Thanks very much for the advice.

Add comment
Tim.. 16 April 2005 21:27:20 permanent link ]
 
"Chris Street" <venus.ngfb@chris-s­treet.demon.co.uk> wrote in message
news:l4jzqel04zpc$.­1hjcwbfr6sh84$.dlg@4­0tude.net...> On Fri, 15 Apr 2005 08:54:39 +0000 (UTC), Tim.. wrote:> >
I havent tried this on the Focus, but I am told that it doesnt work and
ECU flags a fault if the EGR valve is blanked with a solid plate, or the> > hose is dosconnected.>
There are a lot of Foci with a blanked EGR that have no problems, and no> DTC codes appearing either.>
There is no valve lift sensor on these and the ECU regulates the degree
EGR by looking at the MAF sensor reading dropping as it opens the EGR.> > Obviously if the EGR valve cannot pass any exhuast gas the MAF reading> > doesnt drop and the ECU knows something funny is going on.> >
There is no choice but to have a properly functioning EGR valve on the> > TDCi's.>
Considering that many have been driving for over a year with a stuck valve> because Ford couldn't make them work I'd say it doesn't upset them all
that> much.

Obvisouly not! As i said I have had no direct experience of blanking the EGR
on this engine, it was just what I was told at a Ford Technical seminar.

I'd be the first to try to blank off the EGR and if it threw up a DTC try to
get around it. EGR is the work of the devil!!

Tim..


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CarGuru > Open discussion > fiesta courier diesel problem 16 April 2005 21:27:20

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