I've been having a little google about boost adjustment on the xud engine, and from what I have seen it's allegedly possible to adjust the boost on both the Lucas and Bosch systems, my car has over 200k under its belt and does go ok as it is, but I did wonder how I would go about tweaking it for a little bit of a performance gain.
My car is a P plate 2.1 td, and I don't know whether it has a Lucas or Bosch setup, but I just wondered if adjustments are possible or not, and if so, how I might go about it.
Thanks in advance
2.1td, boost adjustable?
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Re: 2.1td, boost adjustable?
The Bosch pump is easy to uprate, there is a screw and locknut on the back of the pump where the injection pipes come out, turning the screw clockwise I think will increase the fuel, it only need moving a small amount. The lucas one is not so easy and as I have only had Bosch pumps on the XMs I have been driving for 15 years or more I don't know much about the Lucas ones.
I suspect yours might be part electronic control if its on a 406 or even a full electronic EPIC pump, in which case I can't help you although someone else might be able to. Does it have a throttle cable attached to the pump or is it fly by wire?
Peter
I suspect yours might be part electronic control if its on a 406 or even a full electronic EPIC pump, in which case I can't help you although someone else might be able to. Does it have a throttle cable attached to the pump or is it fly by wire?
Peter
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Re: 2.1td, boost adjustable?
There is a fella on YouTube that showed how to adjust the Bosch pump, there is an Allen key bolt under a little cover on the pump, just above the alternator ( cover the alternator with something as diesel will pour out, then you need to turn the pump internals to see the bolt/screw as it rotates)....
I think yours may be a Lucas, its possible to tweak ( same YouTube box ) but more tricky....
Found the link;
http://www.youtube.com/watch?v=X4l5on3_IrA
I think yours may be a Lucas, its possible to tweak ( same YouTube box ) but more tricky....
Found the link;
http://www.youtube.com/watch?v=X4l5on3_IrA
Last edited by GingerMagic on Mon May 26, 2014 10:46 pm, edited 1 time in total.
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PP2000 user, can help with faults / diagnostics in the Bournemouth area.
1998 Volvo 940 auto estate - also mine
2019 Citroen C3 something - the wife's
PP2000 user, can help with faults / diagnostics in the Bournemouth area.
Re: 2.1td, boost adjustable?
Presumably that would be an electronic Bosch pump, mine were all mechanical.
Peter
Peter
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Re: 2.1td, boost adjustable?
You have a fully electronic Lucas EPIC pump.
It needs remapping for any extra fuel.
Personally I'd replace it with a Bosch pump!
It needs remapping for any extra fuel.
Personally I'd replace it with a Bosch pump!
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Re: 2.1td, boost adjustable?
Excellent idea - if you can find one.
Re: 2.1td, boost adjustable?
mate knock the inside of the cat out and you will notice a big difference and it will still pass a mot
1998 peugeot 406 2.1 td executive saloon silver,d9 mods 18" dare v2 alloys In Phase XTC 6.5″ 240W Component Speakers up front and Vibe Slick 6x9 Three Way Speakers - Slick 693 in the rear runing off a Alpine MRV-F307 V12 Series amp and a vibe cbr 12 twin evo sub in the boot. 1998 peugeot 406 2.1 td lx saloon red
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Re: 2.1td, boost adjustable?
Cheers guys, lots of helpful info
I think I'll go down the cat ahem, *modification* route haha, although I have to say I'm quite surprised something diesel and as early as 96 would even have a cat fitted, well you learn something new every day eh
I think I'll go down the cat ahem, *modification* route haha, although I have to say I'm quite surprised something diesel and as early as 96 would even have a cat fitted, well you learn something new every day eh
Re: 2.1td, boost adjustable?
None of mine had cats - but some do.
Peter
Peter