Diesel Fuel Pump

[Trigsbroom]

I was under the impression that the 2.7TD Terrano (1998) has an electrical fuel pump, am I wrong? because I can't find reference to it in the manual. My Terrano has conked out due to a failed fuel pump, so is there an electrical pump, if so where is it? or is it the injector pump that's the problem? Any help wold be appreciated. Thanks

 

[zippy656]

GGGRRRRRR manuals been blocked off for me at work!!! BU M

 

[Darwin]

I was under the impression that the 2.7TD Terrano (1998) has an electrical fuel pump, am I wrong? because I can't find reference to it in the manual. My Terrano has conked out due to a failed fuel pump, so is there an electrical pump, if so where is it? or is it the injector pump that's the problem? Any help wold be appreciated. Thanks

Its mechanical.

 

[Terranosaurus]

With electronic control.

 

[Trigsbroom]

Thanks for the rapid responses, a little more info would be helpful. There was an electrical buzzing when the engine was switched off for a week or so prior to the failure. I have another dead Terrano (different problem) that I can use as a donor for parts, so swapping bits over is possible.

 

[Terranosaurus]

Thanks for the rapid responses, a little more info would be helpful.

Like what?

Is this a TD or a TDi - I assume it is a TDi from the age. Is your donor vehicle also a TDi - ie do they both have intercoolers. Also are they both onthe same injection system bosch or the other one begining with Z - check the MAF it will say on top of that.


Of you are looking for a lift pump there isn't one. There is only an injection pump on the side of the engine.

Why do you say the problem is due to a failed pump? Could it be a blocked pickup in the tank if you're looking for a lift pump.

 

[Trigsbroom]

Hi,
Yes, they're both TDi's, but not sure of the make of the pump as it is with a recovery company, but I'll check it when I get it back. The reason I think that the pump has failed is that it was billowing white smoke before it came to a halt. It has a new fuel filter and was running fine previously. The recovery bloke took out one of the injectors and there was no fuel flowing when the engine was turned over. I was looking in the tank of the donor vehicle because I thought there was an electric in-tank pump, but I guess that's just the petrol version. When I changed the filter recently, the old one was very dirty, so it's certainly possible that the pick up is blocked, I'll check that first when I get the car back, just another 6 seized 8mm bots to take out!

 

[Terranosaurus]

Pick up blocked or even cracked.

Fuel lines are well known for going porous and sucking air which causes clouds of white smoke. Air leak at the fuel filter is another possibility - could be the pump but its rare in these.

 

[Trigsbroom]

Thanks for that, I'll check everything before the pump then. Looking forward to getting shot of the loaned sterile Zafira and getting my tractor back!

 

[Trigsbroom]

Ok, I've got the car back, I disconnected all fuel lines and flushed them through with air, cleaned the banjo gauze filter on the pump, fitted new filter cannister,made sure there's fuel in the system, and there's no sign of it wanting to fire. The only sign of life was when I pressurised the fuel supply to the pump with air, but it didn't continue to run or try to start again once the air pressure was removed. It's a Bosch pump, and I've read that it's generally the EDC which fails. My questions re; 1) what do you think?, 2) is it not possible to replace the Bosch pump with a Zexel pump? (I have one available), 3) can the EDC be removed without removing the pump from the engine? and 4) can anyone recommend a service to repair the pump or EDC?
Thanks

 

[Timbo_1975]

Bummer.

Firstly, no, you cant replace the Bosch with the Zexel, as the wiring, and control systems are different.

Either get a known good 2nd hand Bosch, or have your bosch rebuilt,

OR (if you are handy with spanners and have a donor)

replace the EDC pump with the mechanical setup from an earlier TD (much simpler tuning potential) and junk all the electronics.

 

[Trigsbroom]

Thanks Timbo. Replacing with an earlier mechanical pump is an interesting option, will it go (more or less) straight on? does it not confuse the rest of the electronics? ie presumably the ecu warning light will stay on

 

[Timbo_1975]

Yes warming lamp would stay on until you removed the bulb. The ecu needs to remain in place, and powered with all sensors connected, apart from the pump, and APS, otherwise your instruments wont work (tacho, temp gauge, a/c etc)

It is a fairly simple swap but you need:

accelorator pedal, bracket and cable.
mech inj pump & bracketry.
Injector lines.
Injectors suitable for your head (there are two sizes) FROM a mech inj'd donor engine.

Mix well with fairy dust, and simmer for 3 hrs, bob's your uncle!

I dont recommend doing the swap unless you are pretty competant and have a good understanding of what you are doing.

 

[Trigsbroom]

Thanks mate, I'm not pretty, but I am competent, and I don't have any fairy dust...will Dead Sea Salt do?:lol
I'll bear that in mind if I can't get a Bosch pump or a repair for a reasonable price.:thumb2

 

[Timbo_1975]

I think a known-good replacement pump form a similar vehicle might be your best solution.

It sounds like the charge pump has broken up on yours.

 

[DEE]

No

If it did fit which is does not Dont touch a zexel :doh Keep with a bosch. Never found a car yet that run's A1 with one of them things. But wait for it. Ive got one mines fine. o and me. And me mines ok This is just what i Know with messin with them for about 20 years. Get that there bosch one serviced if its that.

 

[Trigsbroom]

This is another "what do you think?" post!
Recap; I bought the car about a month ago, I've done about 2000 miles in it with no problems. When I got it, I changed engine oil and oil filter, fuel filter and air filter. All was fine, then I took the heat exchanger/fuel heater off my old Terrano so that I could use SVO/WVO (I'd run the old Terrano for about 40,000 miles on 100% WVO). Then I went on a trip of about 250 miles, about 30 miles on, the car started puffing out white smoke and lost power, this would clear intermittently. I put this down to air working it's way through the fuel system after it was recently disturbed. Then 100 miles into the trip it was clearly lacking power so I pulled into a layby whereafter it would start and tick-over but would not pull at all. So I got recovered by Autonational Rescue. Having got the car home, I removed all fuel pipes and blew them through with air, I cleaned the gauze banjo filter on the pump and primed the system as best I could. The only time it tried to start was when I pressurised the line between the filter and the pump with air. then this morning, after pondering over all the work needed to replace the fuel pump with an 'unknown quantity' secondhand pump costing £200+, I had one last try at starting it. After about 15 seconds of cranking, it fired and after a bit of rough running and white smoke it settled down into a Swiss watch tickover. I've just been out for a 10 mile drive, and after half a mile, there was no sign of white smoke and the car starts and runs perfectly. Now, a theory is that crud from the heat exchanger (which has had about 4000 litres of WVO through it) could've been dislodged by the detergent qualities of the neat diesel I was using, and blocked fuel lines or somehow breached the filter. BUT.. is there possibility of there being an intermittent mechanical or electronic fault with the pump? Do they just fail, or can their failure be intermittent?
I would be extremely grateful of any advice!

 

[Timbo_1975]

Lucky!!

When they fail, they generally fail and that's it.

If it was a problem with the electronic part (which isnt really, just electric controls) then you would have the MIL on.

If it was the pump itself, then it wouldnt run at all, or would run at tick over only.

Air leaks on these are pretty common, as are a bunged up mini-filter. Was surely one of these issues, or an air lock perhaps due to the SVO heater unit positioning(?) or a poor hose connection etc, plus you didnt mention the SVO unit initially!!

 

[Trigsbroom]

Thanks Timbo, that's a real help. I didn't mention the heat exchanger because I didn't think it was an issue, and I was running on diesel with no veg oil at all. I've not used the car again since this morning, but I've started it from cold and let it tickover a couple of times and it seems fine. I need to do a 120 mile trip tomorrow, so we'll see, but I'm really quite confident that it's ok now.
Thanks everyone, for you input!:thumbs

 

[Trigsbroom]

I've done over 500 trouble free miles now, so it was just a severe blockage after all!
Thanks to all who offered advice!:thumb2:thumb2
Mike