Clogged up CX Diesel

citroencxdiesel · Post by **citroencxdiesel** » 02 Sep 2005, 01:34

Hello all,
Unfortunately my trusty old CX 25D has become somewhat off-the-mark in recent months. My forward trajectory is being limited on any road with even an inch of acceleration possibility.
Ever since a dealer service at the beginning of May, the car has had a depleating amount of go. The engine is markedly less keen to rev above 2500rpm and sounds fatter and wider than in it's prime.
Is there any value in flushing the engine with one of the agents generally available for sale (Halfords, etc?) My students are becoming irate at the lateness of their lecturer!
Thanks,
Chris

Stinkwheel · Post by **Stinkwheel** » 02 Sep 2005, 01:47

Assuming you have no real underlying problems I have had great success in the past with redex diesel treatment. This added to the fuel on fill up claims to lubricate and unclog the parts other snake oils cannot reach, and i have to say it seemed too.
All this said, what did the garage do to the car? This reeks of a diesel pump timing being out of sync.
Give us a few more details

AndersDK · Post by **AndersDK** » 02 Sep 2005, 01:53

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by citroencxdiesel

...
Ever since a dealer service at the beginning of May, the car has had a depleating amount of go. The engine is markedly less keen to rev above 2500rpm and sounds fatter and wider than in it's prime.
...
<hr height="1" noshade id="quote"></blockquote id="quote">Bet that's exactly the problem [8]
Get the engine checked ASAP at an independent diesel specialist !
Something serious is at wrong as the CX 2.5D is a reknown workhorse - (very !) easy to maintain up on performance.
I suspect a timing failure - timing belt may be offset.
- or a clogged exhaust.
- even an ignored intake air filter change (at your trusted dealer !).
BTW : how is the fuel economy ? - the CX diesel should be easy to obtain almost 10miles pr liter.

Post by **Peter.N.** » 02 Sep 2005, 04:13

First, try changing the fuel filter, it used to almost suddenly bring mine to a halt when clogged.

fastandfurryous · Post by **fastandfurryous** » 22 Sep 2005, 11:26

I'd agree wholeheartedly with Peter on this. I've had a few diesel engines seemingly strangled and without any power to speak of due to a clogged fuel filter.
Does it start easily/instantly and idle smoothly?

DoubleChevron · Post by **DoubleChevron** » 22 Sep 2005, 11:49

I'd be checking everything the dealer went near...
Starts playing up right after it's been 'serviced'. that screams the dealer screwed something up ... Did they put the wrong fuel filter on (though with a deisel that would be hard to imagine).
If you get stuck, let me know I have quite a few CX deisel parts including several injector pumps. They are all however from Turbo II deisels.
seeya,
Shane L.

jeremy · Post by **jeremy** » 22 Sep 2005, 20:32

A couple of points - isthe throttle opening fully? (Not straining cable as this may damage a cable clip of the throttle lever bearing on the pump). Certainly our ZX 1.9D needs all its throttle travel to make good progress and even a mat under the pedal is noticeable.
Second is - did the mechanic fiddle with the maximum fuelling to reduce emissions for the MOT? If so if you can say which pump you have someone will be able to point you to the right screw to adjust.
jeremy

crooser · Post by **crooser** » 23 Sep 2005, 01:04

it won't be the timing belt because the timing is done by gears.my guess is that it is a fuel problem,probably a lack of.there is no turbo so an air leak won't be the problem.having said this i am presuming that it is an early cx.

fastandfurryous · Post by **fastandfurryous** » 23 Sep 2005, 01:13

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by crooser

it won't be the timing belt because the timing is done by gears.
<hr height="1" noshade id="quote"></blockquote id="quote">
All CX diesel engines have 2 timing belts. A large one that drives the camshaft and the oil pump, and then a smaller secondary one that drives the injection pump from a "piggyback" drive on the camshaft pulley.
It's one of the few engines to be both a pushrod engine, and have a cambelt. Only other I can think of is Landrover 200/300 TDi engine.

citronut · Post by **citronut** » 23 Sep 2005, 03:44

when i first got my BX 1.9D it was as flat as a pancack to drive,what it turned out to be was a partly stuck throtle lever that was not letting me get full execleration,just get somone to hold the throtle pedle to the floor and see if the lever is moving to end of its travel
regards malcolm

Stinkwheel · Post by **Stinkwheel** » 23 Sep 2005, 04:02

CX's have a reputation for having wrongly adjusted accel cables.
They dont allow full opening of the lever/flap etc. Best to check.

citronut · Post by **citronut** » 23 Sep 2005, 04:18

on my BX it was a partly stuck lever
regards malcolm

DoubleChevron · Post by **DoubleChevron** » 23 Sep 2005, 06:07

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by fastandfurryous

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by crooser

it won't be the timing belt because the timing is done by gears.
<hr height="1" noshade id="quote"></blockquote id="quote">
All CX diesel engines have 2 timing belts. A large one that drives the camshaft and the oil pump, and then a smaller secondary one that drives the injection pump from a "piggyback" drive on the camshaft pulley.
It's one of the few engines to be both a pushrod engine, and have a cambelt. Only other I can think of is Landrover 200/300 TDi engine.
<hr height="1" noshade id="quote"></blockquote id="quote">
Do you wish me to take a photo of a CX deisel wagon with a gear driven pump [:D] The early ones were gear driven you know [:)]
seeya,
Shane L.

fastandfurryous · Post by **fastandfurryous** » 23 Sep 2005, 07:16

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by DoubleChevron

Do you wish me to take a photo of a CX deisel wagon with a gear driven pump [:D] The early ones were gear driven you know [:)]
<hr height="1" noshade id="quote"></blockquote id="quote">
Was that not the 2.2L diesel engine though? as far as I knew (although I could well stand to be corrected) all the 2.5L diesel engines are belt drive.

DoubleChevron · Post by **DoubleChevron** » 23 Sep 2005, 07:36

Yep ... it's a 2.2

She's a real speed machine (as you could imagine).
seeya,
Shane L.