XUD7T injection pump problem
Moderator: RichardW
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moizeau
- Donor 2024
- Posts: 1589
- Joined: 12 Jan 2015, 16:08
- Location: France 36
- My Cars: 91 BX TZD Estate. Dead but loved
407 HDI 136 auto
C4 2l petrol coupé
2010 Dispatch III HDI 90
AND a 1980 Z1000ST
AND a 1983 GPz1100 inj
AND a 1995 Zephyr 1100
AND a 1980 Z650 (my moped) - x 315
XUD7T injection pump problem
A couple of days ago the engine on my BX started surging on tickover and sounds like a bag of spanners. Above 1700 rpm it'd fine. I think it's got the CAV pump. I've checked the 'extra fuelling diaphragm' to see if it's spitting diesel into the plenum chamber, as this went several years ago, and all seems OK. The throttle arm on the top of the pump has got some wobble, and the revs can be altered by moving it perpendicular to it's normal direction of travel. So I assume it's sucking air. The question is, how easy is the repair? I've played a lot with the epic, but I haven't a clue what's inside a mechanical pump. Any advice, drawings would be much appreciated.
Pete
Notice the BX is still top the list but sadly gone
Notice the BX is still top the list but sadly gone
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Stewart(oily)
- Posts: 894
- Joined: 07 Oct 2005, 16:31
- Location: North Wales
- My Cars: Citroens since 1990, BX Diesel, GTI, TZD with 1.9 TD running extra boost before it was fashionable!, ZX Volcane TD, S2 Xantia break 1.9TD, Xantia HDI 110, currently zipping about in a C2 Diesel. C2 died from the dreaded worm, C3 Picasso HDI Exclusive, the adventure continues.
- x 31
Re: XUD7T injection pump problem
There used to be a kit to repair the throttle spindle on those, about £7.50 back in the day, the surging is likely the pump sucking in air through that, a straightforward enough job. 
BXs since 1993 built 1.9 TZD turbo, got a S2 Xantia estate, brilliant car! 2013, Xantia HDI LX 110 2000 new car with 122,000, l C2 HDI Rusty rocket, C3 Picasso HDI new to me.
-
moizeau
- Donor 2024
- Posts: 1589
- Joined: 12 Jan 2015, 16:08
- Location: France 36
- My Cars: 91 BX TZD Estate. Dead but loved
407 HDI 136 auto
C4 2l petrol coupé
2010 Dispatch III HDI 90
AND a 1980 Z1000ST
AND a 1983 GPz1100 inj
AND a 1995 Zephyr 1100
AND a 1980 Z650 (my moped) - x 315
Re: XUD7T injection pump problem
Cheers, is it just take the top off? What precautions are needed regarding spindles etc? I'm guessing there must be a worn bush also? Thanks again
Pete
Notice the BX is still top the list but sadly gone
Notice the BX is still top the list but sadly gone