HI, I have an LDV Convoy, 1999, with the non turbo Transit engine
fitted. Over the last few weeks, top end power has reduced
considerably. The motor pulls fine at low revs, but  the top end
performance is rubbish. I have changed the fuel filter, to no avail. I
think the engine itself is fine, compression wise, or it wouldnt pull
well at low revs. The engine sounds fine, no missfires, rough running
or smoke. I suspect an injector pump problem , but as I have little
experience with these engines, its a bit of a guess. Is this a common
fault with these motors? Any help, suggestions from any of you who know
these engines will be much appreciated, before I place myself at the
wallet ripping mercy of my local diesel engineer!! Thanks in
anticipation,

               Andy.

wrote in message 
news:1128159232.214467.314930@g47g2000cwa.googlegroups.com...

> HI, I have an LDV Convoy, 1999, with the non turbo Transit engine
> fitted. Over the last few weeks, top end power has reduced
> considerably. The motor pulls fine at low revs, but  the top end
> performance is rubbish. I have changed the fuel filter, to no avail. I
> think the engine itself is fine, compression wise, or it wouldnt pull
> well at low revs. The engine sounds fine, no missfires, rough running
> or smoke. I suspect an injector pump problem , but as I have little
> experience with these engines, its a bit of a guess. Is this a common
> fault with these motors? Any help, suggestions from any of you who know
> these engines will be much appreciated, before I place myself at the
> wallet ripping mercy of my local diesel engineer!! Thanks in
> anticipation,
>
>               Andy.
>


check for blocked air filter, damaged exhaust or collapsed baffling, mal 
adjusted throttle cable or anything loose or restricting full throttle 
operation, also check cam timing if it has a belt ( in case it has  slipped 
a tooth).

mrcheerful

The message 
from andypdq@bigfoot.com contains these words:


> I have changed the fuel filter, t


What about the air filter?

And while you're at it, check the whole inlet system to see if it's
obstructed. If it's bad you'd expect smoke[1] but not if it's just a
bit.

[1] Reduced inlet flow which the injection system can't detect unless
it's got a flow meter, which I don't think that model had. same fuel,
less air = smoke if it's bad. If it's only slight it may not be
noticable.

-- 
Skipweasel.
In the beginning was the word.
And the word was Aardvark.

"simondo"  wrote in message 
news:5Gq0f.3283$rp1.226@newsfe4-win.ntli.net...

>
>  wrote in message
> news:1128349902.071336.68910@z14g2000cwz.googlegroups.com...
>>
>> Moray Cuthill wrote:
>> >  wrote in message
>> > news:1128159232.214467.314930@g47g2000cwa.googlegroups.com...
>> > > HI, I have an LDV Convoy, 1999, with the non turbo Transit engine
>> > > fitted. Over the last few weeks, top end power has reduced
>> > > considerably. The motor pulls fine at low revs, but  the top end
>> > > performance is rubbish. I have changed the fuel filter, to no avail. 
>> > > I
>> > > think the engine itself is fine, compression wise, or it wouldnt pull
>> > > well at low revs. The engine sounds fine, no missfires, rough running
>> > > or smoke. I suspect an injector pump problem , but as I have little
>> > > experience with these engines, its a bit of a guess. Is this a common
>> > > fault with these motors? Any help, suggestions from any of you who
> know
>> > > these engines will be much appreciated, before I place myself at the
>> > > wallet ripping mercy of my local diesel engineer!! Thanks in
>> > > anticipation,
>> > >
>> > >               Andy.
>> >
>> > Given what you've said about there being no smoke, rules out any
>> > restrictions in the air inlet system (such as airfilter or EGR 
>> > problem).
>> > The next step is a quick test drive, to see just how flat the engine 
>> > is.
>> > Select a suitable gear (normally second or third does), and accelerate
> flat
>> > out until you hit max revs. If the engine struggles until it nears max
> revs,
>> > then feels as though you get a bit extra go as it finally nears max 
>> > revs
>> > then the piston on top of the pump is most likely the fault.
>> > If you look at the top of the injection pump, you'll see an assembly
> that is
>> > held on with (iirc) 4 bolts and has a round section in the center. If
> you
>> > remove the bolts, inside this sits a piston, which wears slightly, and
>> > replacing the piston cures it.
>> >
>> > If however the engine is flat all the way to max revs, then it could be
>> > several problems.
>> > You've already changed the fuel filter so that rules that out. So the
> next
>> > thing I'd be checking is for is any fuel pipes that have rubbed 
>> > through,
>> > especially the main pick up pipe from the tank to the fuel lift pump
> (this
>> > may show a damp patch if leaking, whereas any other pipes would visibly
> be
>> > leaking fuel). The usual rubbing area is on the mounting bracket for
> them at
>> > the top of the bell housing, but check them along the full length under
> the
>> > van aswell.
>> > The next possibility could be the fuel lift pump. Easiest way to check
> is by
>> > substitution (know anybody else who'd let you swap it to try??). Also
> check
>> > that the heat shield is installed around the lift pump, as the fuel may
>> > vaporise if it's missing.
>> > The last check is to check the engine timing, as it is known for these
> belts
>> > to jump teeth. Also worth making sure that a modified tensioner has 
>> > been
>> > fitted (original tensioner was held on by two 13mm headed bolts, the 
>> > new
>> > tensioner is held on by one 17mm bolt). The timing check is normally
> done
>> > last, as it's the first step for removing the injection pump.
>> > Failing that, then the most likely problem is that the injection pump 
>> > is
>> > starting to break up internally. Sometimes metal flakes may show up in
> the
>> > fuel filter (drain the fuel filter into a clean white container and see
> if
>> > there's any sparkly bits), but not always.
>> >
>> > From experience, I would say the fault most likely lies within the
> injection
>> > pump, but you should always eliminate the simpler problems first.
>> >
>> > moray
>>
>> Everything seems ok apart from metal bits in the fuel filter, I will
>> try the max revs test this afternoon, when the engine is hot. It looks
>> like the injection pump, and  the old wallet will be a bit thinner in
>> the near future (isn't life great?!!!) Thanks for the help chaps, much
>> appreciated.
>>
>>         Andy
>> We had this latley with our T-reg ldv,loss of power etc and first thought
> was the lift pump drawing in air,it went to our local ldv garage and it 
> was
> something to do with the earth starps,can only assume glow plugs pump area
> but it cured it and it goes like a train now,try ringing your local ldv
> garage apparantly they told us its a common fault.


An earth fault on the basic 2.5di would only cause an immobilizer fault, 
which would normally cause it to cut out, or refuse to start. It certainly 
wouldn't cause lack of power.
Certainly on the turbo'd ones with fly by wire, a bad earth can cause 
endless problems.

Other thing is, not all ldv's used the transit engine. There were a lot of 
peugeot engines around that era as well.

The message 
from "Moray Cuthill"  contains these words:


> Other thing is, not all ldv's used the transit engine. There were a lot of 
> peugeot engines around that era as well. 


T-reg? Surely not - they'd swapped to Ford engines by R-reg at least.

-- 
Skipweasel
Never knowingly understood. (Ivor Cutler)

"Guy King"  wrote in message 
news:31303030343237394345AE2B95@zetnet.co.uk...

> The message 
> from "Moray Cuthill"  contains these words:
>
>> Other thing is, not all ldv's used the transit engine. There were a lot 
>> of
>> peugeot engines around that era as well.
>
> T-reg? Surely not - they'd swapped to Ford engines by R-reg at least.


It all depended on size/weight/power as to what engine came with them.
I'm sure most of the larger ones had transit engines by then, but certainly 
alot of the smaller ones still had pug engines, and did have until only a 
few years ago.