talbot express motorhome
Messages 1561 to 1580 of 1879. < Previous 1 ... 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 ... 94 Next >
Can anybody confirm the order in the 2.5d fuel system, and thanks for previous suggestion. Is it: tank--->filter---->pump----->injectors or tank---->pump----->filters---->injectors cheers, john
Nick
That's how I've connected it but seems that I can't get it to prime. In the Ducato the pump sits below the filter and is physcially seperate from it. May have to take the filter apart and see if its clogged up at the entrance/exits. Also just remembered that I'm almost out of fuel and priming on a slope -I could be trying to displace air with er, um, air!
One other thing to consider, although unlikely, is the tank breather. Inside the nearside front wing, you should see a tube swan neccking from the filler pipe. Follow this doen to the front of the fuel tank, and you'll see a little non return valve. Just make sure this is doing it's thing and not preventing air entering the tank. As for priming, makes sure you've got enough fuel in there, pump the life out of it until every last bubble comes out of the bleed screw on the filter housing. I am working on the assumption you have a Lucas/CAV rotodiesel setup, not Bosch. I only have experience with Lucas. Oh, also, you can do what I did, as a process of elimination - rig a funnel up to the fuel pipe going into the injection pump, bypassing the filter all together. When the engine spins up into life, you'll at least be able to say for certain it's something to do with priming / tank breathing. Let me know the result! Nick
My unit is a Bosch actually. I have the fuel lead coming into the filter on one the side taps , marked with an inward arrow. I then have the lead from the filter to the fuel pump coming out of the tap on the top of the filter. Is this correct? Then the fuel pump has a lead down to the injectors. I was thinking that since my filter has been mysteriously bypassed, it was probably full of nothing but air and so will need some priming to fill it all up with fuel. I may also actually take apart the fuel pump to clean the fuel pump filter as well as the fuel filter. I'm pretty sure this random cut-outs I've been getting have a fairly simple cause as the van runs well most of the time!
If your priming pump has been bypassed, it may be as simple as a blocked filter or if yours is the same as mine (has a plunger on the top?) It may be the diaphram has split and the pump does not work. Sorry, but I don't know how different the Bosch setup is. How you have arranged the hoses sounds right to me. Nick
Don't worry I'm not about to touch the diesel injectors! My system is very different from yours. My fuel pump is below the flter, seperate from it. And with its own priming arm. In the Ducato menu it says that this pump has its own filter and encourages you to periodically remove it and clean it in petrol. I can't prime the system at all. I am wondering if it isn't tank to pump to filter after all - otherwise why would the pump need its own filter??? I'va attached photos, if you can make any sense of them! http://img.photobucket.com/albums/v616/moo......3/fuelpump1.jpg 
I dont have any personal experience of the ducato/peugot diesel systems but as an ex heavy goods and plant mechanic I can assure you that the filter is there for a good reason as you would expect! The injection pump is a very precise bit of machinery and the smallest particle of dirt has the potential to ruin it completely. Hence the filters. The filters also often have a water drain on them somewhere as the injection pump also relies on the diesel for internal lubrication. Water doesnt work very well as a lubricant in this instance. The priming pump is often also the supply pump and you may well find that it pumps from the tank via the injection pump and returns to the tank to ensure the injection pump is always kept primed and full. If the supply pump is not working as effectively as it should then you will sometimes get the effect where the supply from the supply pump is reduced and the injection pump trys to draw fuel against a suction. This finds any slight leak in the system, draws in air and you then get a slowing down or stopping of the engine. One major culprit in this respect is copper washers, you will find them on the banjo joints and under the bleed screws. For what little they cost I would spend half an hour or so and go over every single copper washer in the system and either replace it or get it annealed. Also be very suspicious of jubilee clips on a diesel system as when they tighten up, especially small diameter ones; they do not tighten in a circle because of the stiffer portion where the screw bit is. This can often lead to a minute air gap, not big enough to leak fuel out but enough to draw air in!! hence you cant see the little Bu***ers as there is no evidence of diesel around the joint. Also check as you would with a petrol engine that the tank is breathing and not closed so that as you drain out fuel a vacuum is built up. I always used to carry one of the temporary plastic fuel caps as they never fit tight and always allow a bit of air to pass. run with this for a while and if your problem goes away you know to check the tank vent. Hope this is some help Kind regards B.K.
Sorry, I failed to spot the part in your post where you said it is a Ducato. My understanding is that the 2.5 Ducato is a completely different engine from the Talbot Express/Citroen c25 even though it's in the same body. So all my comparisons have gone out the window! Nick
I am getting more convinced the order is tank---pump----filter. Thinking about it, the other option of tank-filter-pump wouldnt make much sense, since the bleed is on the filter, and there would be no way to bleed air from the pump. Also when priming the pump, I would be trying to prime it via an empty and air filled filter - doesn't sound right. If anybody has a sofim 2.5d and can confirm this order please get back to me!!!! Adverts Currently On Preloved - Place an ad here for free
Does it have the rest of the sequence too?
Hope this helps if not I will have to think again also it is worth putting 2 or 3 galls in the tank just to be safe
PIPE-Pump to injection PIPE-Return HOSE-Tank to pump again no mention for checking pipes to filter.
http://www.autodieseltechnics.co.uk
Soz i been ofline for a few days, if the top linkage looks different, then it is the 4 speed box, now i am not sure if the clutch input shaft is the same or not, I do know the flywheel & clutch plate are different on the Mark 1, I put a mark 1 engine in a mark 2 1992 & I just changed out the flywheel & clutch & seeing as the early flywheel & clutch are thicker, then i would say the input shaft is shorter on the early model 4 speed, but i have not been able to find any data. Kind Regards Rich
I guess i bought a gearbox that didn't suit mine after all,i must say that the linkage is in very good condition no wear at all,the box seems ok.It's cleaned up like new.The man i bought it from said that it had only done 30k,he only changed it because he wanted a diesel,i must say he was a nice genuine man. I will probably put it on ebay,because thats where i got it.Thanks again. Charlie.
This is how I set it up: Tank ---lift pump---filter---injection pump I soon as I set it up like this it primed. Thinking about it, since the bleed screw is on the filter, there is no way the fuel wasn't contaminated with air under the bypassed filter set up. Now I can see the fuel lines full of fuel - "primed" as it were. Also I think the filter also acts a resevoir of fuel - so less work for the pump to do to get fuel from the tank to the injection pump when going up hill. We took it a few junctions down the m4 last night, and so far so good. Seems quieter in 5th, more responsive, and so far no fuel cut offs. Even overtook a lorry on a hill. Unfortunately no big hills around here to test the power on a climb, but is looking good. Before I connected the filter to the injection pump,I primed it until only pristine fuel was coming out of the filter. Hopefully problem solved, and for less then 200 quid including a fuel leak I'm well happy. Especially as I now expect why the van was sold for at least 3k under market. If only the vendor had realised how cheap it would of been to put right! Thanks to all for help - wil report back if further issues. Cheers, John
Messages 1561 to 1580 of 1879. < Previous 1 ... 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 ... 94 Next >
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Edited by NJR 15 May 2008, 3:55 PM
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