John.A.S.

Hi, I think they number from the gearbox end but not sure will check the Haynes manual when I can find it. I was told be the RAC I needed a new injector as in my original post, so did the dealership. But the injector specialist said they work or they don't. full stop. I did change the injector but it did not cure the fault. I had they injector I removed test and they said the injector was testing as new. (82000 miles) The injector people said it will be the connector at the injector they are always causing problems. I got home all running OK lifted the bonnet and moved the connector wiring about where the wires enter they connector immediately the engine started to misfire and the dash said depollution fault and 0202 appeared once again. I cut the wires at the connector and put some small spade end connectors on the two wires (make sure you get them the right way round)and connected the wires to the injector terminals the problem was gone. I bought a new connector £6 and fitted it. You might have to make up some short tails as there is not much slack on the wires. I ended up changing all four connector. John.

Hi, No Idea, I was told by Citroen dealer that 97W should never be fitted and the garage that fitted my new tyres said the suspension does not like the harder walled tyres. I ran my C5 with 97W on all four wheels but I did notice when the tyres were changed to 93W that the ride was softer and the steering lighter. A friend of mine has just changed the fronts from 97W to 93W and has found the same, the car rides the bumps easier and it rolls a bit more.

Hi all, C5 2.0ltr HDI hatchback, 2006. As I needed two new tyres for the car and I have 215/55/16 97W on all 4 wheels but a 93W on the spare, the handbook just said contact your local dealership re tyre size so I did. I was told was the correct size for the car was 215/55/16 93W , so I asked is it OK to fit 97W? He said as long as the tyre is not reinforced, There was a not on the screen saying reinforced tyres should NEVER be fitted to this vehicle. I now have two new tyres on the front with a load rating of 93 none reinforced and the ride is much softer, you don't feel all the little bumps and white lines as you drive along. Also on full lock it does not feel as if you are about to push the tyres off the rims. Before anyone tells me, I am aware that new tyres should always be fitted to the rear axle on a front wheel drive car. I will be have two more new tyres fitted at the end of the month. It was definitely worth the check.

Hi, Thanks for responding. John.

Hi All. RE: VF7RCRHRH76734809. Does anyone know if the RHR engine uses a swirl chamber. Thanks John.

Hi All. Unlocked the car this morning and the rear hatch unlocked and opened. So removed the inner hatch lining (you will need new clips) and took a look at the lock mechanism and the operating lever. It was simply a matter of cleaning the road dirt around the black plate you press to open the hatch. It only moves about 5ml and has only a soft spring to hold it open. I could push the mechanism closed and it stayed closed which meant when you unlock the doors the boot opened. Cleaned it up, put it back and things are back to normal. Try some WD40 or silicone spray around the black touch plate before going to the trouble of removing the inner liner. John.

Yes tried the primer, it clears the bubbles but as soon as the engine starts the bubbles start again.

Hi all, C5 HDI 2.0ltr VTR (2006) ( VF7RCRHRH76734809 ) Checking over the car for a fault that's taking some finding I noticed a few small air bulbs in the clear plastic fuel line between the fuel filter and the high pressure pump while the engine was running. increasing the revs produces a multitude of large and small bubbles initially then reduces to a trickle of small bubbles. The filter has done less than 3k so should be OK but I did notice a yellow o'ring in the supply line connection I have 10mm x 2mm and 10mm x 2.5mm o'rings, but this one measures 10mm x 2.25mm. The o'ring is not shown on Citroen box so don't know if its a part you can order on its own. I do not have a lift pump in the tank so the fuel is drawn from the tank by the high pressure pump. The car always starts first time. If the fuel was draining back to the tank overnight due to air ingress it would be slow to start in the morning so I am guessing the air is being drawn in buy the pump when it is running and the bubbles occur instantly when the revs are raised so possibly something to do with the filter housing. Anyone had this problem. John.

Hi Paul, Thanks for that, I must have missed it in the manual. Will start individual change out and test of injectors to check they are all working correctly. Had endless problems with engine hesitation which was cured by changing the EGR valve but I still had a very slight intermittent power loss around 70mph but not a constant fault and no fault codes showing. Then I had a engine misfire cylinder 2. changed the injector to find cylinder 3 was misfiring 10 minutes later. Tracked the problem down to the injector connectors, ended up changing all the connectors, (merlin diesel said they sell loads of the Siemens / Bosch connectors they cause all sorts of problems including intermittent power fluctuations). Car running fast and smooth but with slight hesitation on occasions, but now tends to be around the 2500 to 3000 revs on acceleration and it might just be my imagination but it tends to be worse when they fuel tank is below quarter fuel, so need to also look at the fuel filter. (no lift pump in the tank on mine). Which end do you count the cylinders from? the RAC engineer and my local garage say from the cam belt. But Merlin diesel said they thought it was from the gearbox end. John.

Hi all, Anyone know what the torque setting is for the two nuts that hold the injector in place on a C5. Hdi 2.0ltr. VTR. ( Vin VF7RCRHRH76734809) Thanks John.

Hi all, On returning from St Ives to Preston car broke down on M5 at Bristol. RAC diagnosed "injection circuit malfunction cylinder 2. code P0202" They gave us a car to get us home and my car will be delivered on Monday. The engine was miss firing. The RAC chap also connected a node to the end of the connector wiring that feeds the injector, It flashed once brightly and then about three time more dimly, then nothing. He said sometimes that happens because the ECU shuts down the circuit. The same thing happened to me about 12 months ago, same cylinder same code, I tided up the wiring at the rear of the cylinder head and the problem was gone until last Friday that is. Anyone know using a meter what values I should get across the injector and across the wiring feeding the connector. I believe the wiring goes back to the PCM how do I identify it (were is it) and what are the pin connections etc. I am hoping its a wiring problem, any help with tracing it would be appreciated. Thanks John.

Hi Tim, Yes finally got it sorted. I went to Merlin Diesel (Walton summit near Preston). They explained that the retaining clip once fitted is locked in position hard against the injector. To release the pipe:- under the shoulder of the injector, part of the retaining clip protrudes, this part you push down to release the pipe. They said people are always trying to force the clip out to remove the pipe. They gave me a new clip. The faulty clip was on the injector nearest the cambelt and you can't get the clip out as its to near the plastic housing that forms part of the rocker box (but you would not recognise it as such) and to remove that you have to remove the inlet manifold, pipes, wiring looms etc and then you need a replacement gasket set at around £40. So I took it to my local garage, they extracted the injector and fitted the clip as it should be and charged me £35.. Thanks for your interest. John.

Hi, Final chapter, Since replacing the EGR valve all has been well with the car. Last week I had the ECU programmed to learn a new part the EGR valve (yes you do need to do it) The car is even better now, It was a little touchy on the accelerator at crawling speeds, since the programming its very smooth at low speeds, it takes off at around 2500 revs really moves at around 3000revs and revs freely up to the limiter at 5000 revs. The car does use the eloys system and the Citroen garage say usually around 75-8000 miles will need filling up and recommends the particulate filter is changed at 125000 miles. The only downside: my right foot starts to ache after a while as I only seem to be using a couple of inches movement on the accelerator and I can't find a comfortable position!!!

Hi, I have a C5 HDI 2ltr 2006. VTR 138bhp Today I had smoke from under the bonnet and a smell of Diesel. On checking one of the small plastic connectors that link the bleed off pipes to the injectors had popped out. I checked the other three injectors and the "u" shaped locking mechanisms (looks like a square headed staple) were fully pushed in against the injectors, so using a piece of wire (the only thing I had) I managed to pull out the locking mechanism, I pushed in the plastic connector and then the locking mechanism but I could not get the plastic connector to stay in. Green flag arrived and had the same problem, then said he had fixed it, for some reason he said the locking mechanism works the other way round, push in the locking mechanism, insert the connector and then pull the lock out. When I got home I checked and it seem to be right. When you pull the lock out a raised section appears which locates in the plastic connector. The Haynes manual says you push down on a wire under the injector to release the connector but that is almost impossible to get at. I am still not convinced, why have three locking mechanisms working fully pushed in and one work the opposite way. I anyone has the same model can they have a quick check which way round they are. Better still if anyone knows without having to check. Thanks John.

Hi Paul. The rattle on the front end. I spent 12 months, checking bushes link arms etc, even had the bumper off, checked behind the wheel arch liners, everything. When it went for MOT I thought they would find something, but the car got a clean bill of health. It only rattled going over cobbles and rough road surfaces, nothing when going over speed bumps. I had bought on Ebay from a dealership a pair of front disc (genuine) for £30 but had not got round to fitting them. I bought genuine Citroen pads from Rigbye's and while fitting the new pads noticed they had a thickish rubber film on the back of them and the old ones did not. When I took it out for a run silence the rattle had gone, I rang the parts gent at Rigbye's and he said it quite a common problem on the C5 and Citroen put the rubber film on the pads to prevent the rattle. It would seem the anti-rattle bits fitted on the calliper don't work as well as they should. John.