My first Activa

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Skull
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Re: My first Activa

Post by Skull » 01 Mar 2019, 16:55

After a run out the suspension fluid return hose was weeping more than normal leaving a small puddle of fluid, it had been weeping previously ^ and I had re-positioned and kept an eye on it but today I found a small tear on the tapered part of the housing so I've ordered a new one for a reasonable £9.99 off ebay

Citroen PART NUMBER: 95050399

I also had a look at the turbo while the car was up in the air after reading somewhere on here that I should be able to see the actuator/arm move approximately 15mm when starting the engine up - mine doesn't move at all even by hand so could that be my problem :?:

I've not got access to Lexia but have had no warning light at all yet just rough running and hesitation on full throttle still gets up to speed but I have to nurse it there :roll:

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Skull
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Re: My first Activa

Post by Skull » 02 Mar 2019, 16:52

Skull wrote:
01 Mar 2019, 16:55


I also had a look at the turbo while the car was up in the air after reading somewhere on here that I should be able to see the actuator/arm move approximately 15mm when starting the engine up - mine doesn't move at all even by hand so could that be my problem :?:



Had my Xantia HDi up in the air and had a look from undeneath at my turbo actuator/arm on start up and it does indeed move a considerable amount maybe even more than 15mm so looks like I've either found another problem or a possible solution .......

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Skull
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Re: My first Activa

Post by Skull » 02 Mar 2019, 22:40

From another thread Turbo.... oh yey
MikeT wrote:
21 Feb 2019, 11:08
madmaxgav wrote:
21 Feb 2019, 09:46
Starting to wonder if a vac pipe or two are the wrong way around or something so the actuator isn't doing a thing.
Easy enough to check - observe the actuator arm when the engine starts. It should retract about 12mm under vacuum.


Got the suspension return pipe delivered in 24 hours so will fit that tomorrow and have a look at the turbo [-o<

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Skull
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Re: My first Activa

Post by Skull » 28 Mar 2019, 16:35

Skull wrote:
01 Mar 2019, 16:55
I also had a look at the turbo while the car was up in the air after reading somewhere on here that I should be able to see the actuator/arm move approximately 15mm when starting the engine up - mine doesn't move at all even by hand so could that be my problem :?:


It does move by hand but requires more effort than I expected :oops:

I've had a play trying to get a vacuum to the actuator including bypassing the vacuum valve with a suitable pipe / removed the vacuum valve and I can hear it clicking and diverting when applying 12v, so that appears to be working. When the engine is running there doesn't seem to be a large vacuum to any of the hoses :?:

Anyone give us a clue :?:

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Skull
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Re: My first Activa

Post by Skull » Yesterday, 13:32

Taking a few steps back as it has been a while now trying to get it running right it's been into a Citroen specialist garage but with no success on curing the fueling issue so I'm going to start again ....

To recap
Skull wrote:
21 Oct 2018, 17:23
Played around with the fuel pump as I was suspicious of it operating as I couldn't hear it priming like my HDi does, but wasn't sure if it would make as much noise :?:

I initially tried fuse 9 (10 amp) in the engine bay but that seemed fine I wasn't sure which relay was for the fuel pump so moved onto the fuel pump itself I tried running it directly off the old car battery Pins 2 (white) and 4 (green) but still couldn't hear or feel anything ... Delved deeper and ended up breaking the sealing ring on the fuel tank #-o but on removal it seemed as though the pump was only just in one piece and was tricky to maneuver out, stuck it in a bucket and tried the battery wires again directly to the pump motor .... almost condemned it but then it purred into life :-D so pulled the terminals off and cleaned up the connection, reassembled pump and popped it back loosely in the tank, turned the key and still couldn't hear or feel anything then thought bugger it just give it a go starting .... fired up first time :-D

She runs elation quickly turned to :evil: as I checked around for further leaks .... LHM LEAKS ALL SORTED
So the garage has reported that:

Turbo boost control circuit OK
Intercooler appears OK
Fuel pressure test at all speeds OK
Fuel pressure fluctuates above and below 3 BAR spec is approx 2.7 BAR
Exhaust emissions test shows engine running weak

They have recommended:

To ensure no fuel supply blockages in tank/pump strength & pick-up & filter (new already fitted)
Test and back-flush fuel injectors
Replace Lambda sensor
If possible test/replace Map/Maf sensor which is integral with fuel ECU

So I'm wondering given the fuel pump wasn't running initially and then ran OK prior to re-fitting whether it's worth pulling it out again for another look maybe it's not strong enough :?: How can I test it :?:

admiral51
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Re: My first Activa

Post by admiral51 » Yesterday, 22:24

Just a thought, not knowing the pump itself, but it should have a litre/hr rating. As you say it seemed dead and then sprang into life it could be weak in terms of its flow rate.
Assuming its a lift pump once the engine is running the engine( carb etc ? ) itself will help pull the fuel through so the pressure may be about right but the flow rate a little low.
You say they have tested pressure at all speeds but the flow rate needed for same speeds in different gears/revs will be different ?
If it is not too expensive i would try to replace the fuel pump as previously you said it will get up and go you just need to nurse it to get there.
As for testing it i guess you would need to put in a flow meter between the feed pipe and pump outlet and monitor it somehow if keeping it in the tank, or take it out and use a non flammable liquid like water where you can submerse and secure it and see how long it takes to transfer a set amount but then you would need the specs for the pump, not just its max flow rate.
I have just replaced the lift pump on my Xantia 2.0 Hdi and its max flow rate is 30l/hr so thats close to 7 gallons an hour, if i use that amount in an hour i guess i only have first gear :)