Flat Xantia

keefy21m · Unread post by **keefy21m** » 03 Apr 2006, 16:56

Hi everyone, I have a 1996 Xantia 1.9d with 110,000 on the clock which I have had since last October. When I am doing say 55 mph on the motorway and put my foot down to go faster there is a flat spot and the car actually goes slower, however if I back off from this and press the pedal down slowly it gradually picks up speed and all is well,also happens between 60 and 70. What could be causing these flat spots? Also the fuel consumption is always only 38-40 mpg even if i drive it like a vicar, surely it should be more than this?, this is my 1st Xantia so not sure what to expect.
It is a bit lumpy on first start up with some blue smoke but uses no oil at all between oil changes but once warmed up goes ok, just the flat spots.

Any help much appreciated.

Thanks

Keith

Dave Burns · Unread post by **Dave Burns** » 03 Apr 2006, 21:06

Could be a blocked fuel filter, those are typical symptoms.

Dave

Unread post by **citroenxm** » 03 Apr 2006, 21:27

Mmm agreed

The pump cannot get enough fuel through to satisfy the demand of the pump when your toe has gone flat to the flour...

How ever, when pressing down slowly, theres not as larger demand for a greater supply of fuel and can cope with it..

Check it out and replace filter first.

Regards
citroenxm

keefy21m · Unread post by **keefy21m** » 03 Apr 2006, 21:54

Thanks for the replies, I did replace all the filters in Jan including the fuel filter but it is still the same, Any other thoughts?

Cheers

Keith

Kitch · Unread post by **Kitch** » 03 Apr 2006, 22:19

Air leak in the fuel?? Although that could cause worse starting problems.

Or a duff turbo?

PowerLee · Unread post by **PowerLee** » 03 Apr 2006, 22:21

Original poster said it was a straight 1.9 D

Kitch · Unread post by **Kitch** » 03 Apr 2006, 22:22

I retract my previous statement!

Not much it can be really.....air and fuel filters aside....diesel pump timing perhaps if its 1 tooth out?

Or perhaps injectors need cleaning out?

Unread post by **citroenxm** » 03 Apr 2006, 22:26

Hi
If timing is 1 tooth out it will absolutly NOT run at all!!

Diesel timing has to be soo close to spot on to run!

Regards
citroenxm

Unread post by **Peter.N.** » 03 Apr 2006, 23:30

What are you doing on here?

f00lzz · Unread post by **f00lzz** » 04 Apr 2006, 19:34

Can the advance and retard be causing this fault?

Unread post by **Peter.N.** » 04 Apr 2006, 19:44

Unlikley. If its over advanced it will knock, if its retarded it will be difficult to start, low power and very quiet.

f00lzz · Unread post by **f00lzz** » 04 Apr 2006, 19:48

Thanks Peter...I ask because since rebuilding my own head after cambelt failure I feel sure it is noiser (quite a harsh 'cackle') any advise?

Unread post by **citroenxm** » 04 Apr 2006, 22:05

Peter.N. wrote:What are you doing on here?

Hi Peter,

Have you a problem?? Do I give out incorrect advice?? Remember, the Peugeot engine is the same as citroen so any knowleadge can be shared here... We have purchased a 309 for my lady to drive around in..

Regards
citroenxm

Unread post by **Peter.N.** » 04 Apr 2006, 22:18

Hi citroen XM

I wasn't being at all critical, I was just surprised to see you! I,m sorry if I gave you that impression.

Peter.

Unread post by **citroenxm** » 04 Apr 2006, 22:20

Hi Peter.

Ah right, sorry. It came to me incorectly. If its XUD, XUDt or HDI powered then I'll have a go...

If citroen then of course!!

New member, J reg 309 1992, 142k FSH, excellent engine, couple of jobs needed. My lady is REALLY pleased with it..

Regards
citroenxm