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td5 feels flat help

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ragerover:
right just got the td5 sorted
its excellent off the mark  and mid range but the top speed is crap

i know there all poor i ran a 200tdi for 11 years but this seems poor great to 60 then struggles to 75mph max it just seems to run out of steam (its deisel i know)
my  200 tdi had the big intercooler and fuel pump mods by jeremy fearn so i could have been spoilt
and to be honest i cant remember before i had it done
it would pull 90 if you wanted but would sit at 75 all day and you could put your foot down and pass plenty stuff if you wanted

the td5 did have the infamous oiling of the harness problem which i replaced and dried everything out  (at least 5 times)
its now bone dry
its a 2000 model with 60 k miles
im eventually going for an upgrade but to be honest im skint at the moment

i love the truck but it just feels flat   ive checked and changed filters etc
how fast are they as standard~?
 got back in the old 200 tdi today and the difference is huge
any advice or help would be grately appreciated
cheers
martin

burgerman:
 Not sure if ours felt "flat" but seemed to run out of revs/steam @ 70 ish, and certainlt did not feel happy at that speed, But we had the disco 2 gears fitted, and wow what a difference  :shocked: 
  Feels much happier to drive at motorway speeds, and you can hold it in gear longer to utilise the power more,

Porny:
A 90 even on standard gearing should do 90mph plus... (a 110 even with a roof rack will pull 95mph on the speedo)....

There are few things that can cause problems on Td5's (not all of them affect top speed though)-

Faulty Mass Air Flow meter
Faulty MAP sensor (goes to a default value)
Faulty injectors
Faulty Fuel Pump (should be 4bar at the engine)
Faulty EGR Set-up (better removed anyway!!)
The infamous harness issue (which you've resolved)
Dodgy ECU's
Faulty Turbo actuators (either siezed or ill adjusted)
Faulty/split/delaminating intercooler pipes


And a few other bits and pieces....

Personnally.... apart from checking the obvious things like air fliters etc etc, I'd get it checked over by someone with proper diagnostic kit - using the live data page get them to check everything is working correctly.


Ian

Jimbo:

My '53 plate 110 hardtop (ex-electricity board) is exactly the same - rapid up to 60, it will make it to 70-75, but my ears can't take the noise.............I've ripped out the EGR junk, fitted a known working standard ECU (thanks Ian), and still no change in the top speed. My theory is that as the leccy board towed huge trailers, maybe they had the gear ratios changed to stop the sparkies from doing 90 with a 3ton genny on the back !

When I find some spare cash (and another transfer box), I'm going to get one of the Ashcroft box's with Disco high range gears - and then do a straight swap and see what difference it makes.

L90OOK:
Hmmm...sounds like you are running D2 High Range Gears &/or large tyres.  :-k
Bin the EGR & fit THIS
Also straight through mid pipe will help & sounds wonderful  :lol:
I fitted a Dastek chip to my Td5 & wow  :shock: what a difference that made.

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