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Old 08-18-2005, 13:01   #1 (permalink)
Tony
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Powerless TDi or is it?

Thanks one and all for your ansers to my clonking problems. Next on the list
is...........The power is shown as max at 4000rpm. I'm lucky if it will rev
to this in 3rd, 4th or 5th. It appears to rev out about 3500 and then only
slowly creep its way to 4000.

I've had a look at the turbo pipes, inlet side but acnnot detect any leaks.
The air box appears intact and filter clean.

How high should the Tdi rev? I appreciate that high reving of diesels is not
particulary recommeded. But what is the 'red-line', not that it actually has
one on the tacho. My Nissan primastar van (diesel...as renault traffic,
vauxhall vivaro clone\) will rev to 4000 then absolutely not rev any higher,
I asswume that there is somekind of rev limiter/governor setup. Does the Tdi
have the same?

Thanks in anticipation

Tony


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Old 08-18-2005, 13:02   #2 (permalink)
Badger
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Re: Powerless TDi or is it?


"Tony" <tony417@ntlworld.com> wrote in message
news:M_4Ne.11714$wh6.1298@newsfe2-win.ntli.net...
> Thanks one and all for your ansers to my clonking problems. Next on the
> list is...........The power is shown as max at 4000rpm. I'm lucky if it
> will rev to this in 3rd, 4th or 5th. It appears to rev out about 3500 and
> then only slowly creep its way to 4000.
>
> I've had a look at the turbo pipes, inlet side but acnnot detect any
> leaks. The air box appears intact and filter clean.
>
> How high should the Tdi rev? I appreciate that high reving of diesels is
> not particulary recommeded. But what is the 'red-line', not that it
> actually has one on the tacho. My Nissan primastar van (diesel...as
> renault traffic, vauxhall vivaro clone\) will rev to 4000 then absolutely
> not rev any higher, I asswume that there is somekind of rev
> limiter/governor setup. Does the Tdi have the same?


Check for the presence of a "gunge" in the fuel lines. Start at the
sedimenter unit on the inner face of the off-side chassis leg, near the back
axle. last umpteen I've looked at with the same low power/rpm symptoms have
been literally choked up with a white-ish gloopy gungy substance, normally
found due to microbiological activity and the presence of moisture. A
thorough clean out and an airline blast back to the tank will prove if that
was the fault or not, but you then need to remove the tank and clean it
properly.
Badger.


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Old 08-18-2005, 15:02   #3 (permalink)
Austin Shackles
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Re: Powerless TDi or is it?

On or around Thu, 18 Aug 2005 19:06:20 GMT, "Tony" <tony417@ntlworld.com>
enlightened us thusly:

>Thanks one and all for your ansers to my clonking problems. Next on the list
>is...........The power is shown as max at 4000rpm. I'm lucky if it will rev
>to this in 3rd, 4th or 5th. It appears to rev out about 3500 and then only
>slowly creep its way to 4000.
>
>I've had a look at the turbo pipes, inlet side but acnnot detect any leaks.
>The air box appears intact and filter clean.
>
>How high should the Tdi rev? I appreciate that high reving of diesels is not
>particulary recommeded. But what is the 'red-line', not that it actually has
>one on the tacho. My Nissan primastar van (diesel...as renault traffic,
>vauxhall vivaro clone\) will rev to 4000 then absolutely not rev any higher,
>I asswume that there is somekind of rev limiter/governor setup. Does the Tdi
>have the same?


I assume you have a rev counter... if it's fed from the alternator, make
sure the connections are sound. Also (ideally) that it's the correct
alternator.

The diesel pump has a governed maximum, yes. Free-revving should be about
4500 as standard, you can set it a touch higher, I think our 300 TDi is
revving to about 4700 or so.

Assuming that it does that (and check also that the throttle cable is not
too slack - might just not be opening the pump up fully) then you might, if
it's still gutless and makes no smoke, contemplate tweaking the diesel up a
bit.

--
Austin Shackles. www.ddol-las.net my opinions are just that
Satisfying: Satisfy your inner child by eating ten tubes of Smarties
from the Little Book of Complete B***ocks by Alistair Beaton.
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Old 08-18-2005, 17:02   #4 (permalink)
Phillip Simpson
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Re: Powerless TDi or is it?

Hi Tony,
if this problem is slowly getting worse I would suggest that
you may want to check your timing. With age and stretch the timing
belt will cause the timing to vary. Usually both the injector pump and
cam shaft end up being retarted, and as timing is important to
performance in a diesel, contribute to a reduction in performance.


Cheers

Phillip


On Thu, 18 Aug 2005 19:06:20 GMT, "Tony" <tony417@ntlworld.com> wrote:

>Thanks one and all for your ansers to my clonking problems. Next on the list
>is...........The power is shown as max at 4000rpm. I'm lucky if it will rev
>to this in 3rd, 4th or 5th. It appears to rev out about 3500 and then only
>slowly creep its way to 4000.
>
>I've had a look at the turbo pipes, inlet side but acnnot detect any leaks.
>The air box appears intact and filter clean.
>
>How high should the Tdi rev? I appreciate that high reving of diesels is not
>particulary recommeded. But what is the 'red-line', not that it actually has
>one on the tacho. My Nissan primastar van (diesel...as renault traffic,
>vauxhall vivaro clone\) will rev to 4000 then absolutely not rev any higher,
>I asswume that there is somekind of rev limiter/governor setup. Does the Tdi
>have the same?
>
>Thanks in anticipation
>
>Tony
>


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Old 08-19-2005, 11:01   #5 (permalink)
TonyB
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Re: Powerless TDi or is it?

>
> The diesel pump has a governed maximum, yes. Free-revving should be about
> 4500 as standard, you can set it a touch higher, I think our 300 TDi is
> revving to about 4700 or so.


Mine was the same until I followed Austin's tweak on the fuel pump. After
that it revs to 4k in 4th, haven't actually tried it in 5th as the original
tweak was enough to earn me two lots of 3 points each!
TonyB


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Old 08-23-2005, 11:01   #6 (permalink)
Austin Shackles
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Re: Powerless TDi or is it?

On or around Fri, 19 Aug 2005 17:48:04 +0000 (UTC), "TonyB"
<Norfolk@soxclara.co.uk> enlightened us thusly:

>>
>> The diesel pump has a governed maximum, yes. Free-revving should be about
>> 4500 as standard, you can set it a touch higher, I think our 300 TDi is
>> revving to about 4700 or so.

>
>Mine was the same until I followed Austin's tweak on the fuel pump. After
>that it revs to 4k in 4th, haven't actually tried it in 5th as the original
>tweak was enough to earn me two lots of 3 points each!


oops.
--
Austin Shackles. www.ddol-las.net my opinions are just that
Appearances: You don't really need make-up. Celebrate your authentic
face by frightening people in the street.
from the Little Book of Complete B***ocks by Alistair Beaton.
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