fuel starvation

garfie · May 17, 2006

Hello all,

I'm new to this, so please bear with me. Anyway, I've got a problem with my 110 2.5TD engine, (1988).

It starts fine, and runs fine until it gets to 60mph then it dies until the speed drops back to 55mph then it'll pick up again. The strange thing is, it only happens at this speed, which leads me from thinking it's air in the fuel or a blocked filter / breather etc. Neither does it seem to depend on the amount of fuel required, i.e. "the pig" (that's my wife's name for it), will run perfectly ok at low speed with the engine working hard on full throttle but will cut out at 60 with the throttle barely open

As a matter of course, I changed the fuel filter anyway and tried running with the fuel cap off ..... no difference.

If anyone has any ideas, I'd be really grateful 'cos this has got me completely banjaxed! I'm just facing Solihull and praying that it's not going to entail buying a new fuel pump.

Thanks all,

discomania · May 17, 2006

Does your lift pump work properly?

I had a similar problem, it was the lift pump.

To test this, with the engine off, diconnect the fuel out pipe from the pump, and give it a few tweeks on the lever, if no fuel comes out then give the engine one crank (literaly one tiny blip on the starter to move the cam shaft to the opposite position) then give it another little tweek, if still no fuel coming out then you have a deffective lift pump which needs replacing, easy job and fairly cheap.

slob · May 17, 2006

i think if it was yer pump you'd be fooked at all speeds. have you checked inside the tank fur crap?? it could be that the pick up is blocking then when engine dies the crap falls away and unblocks it. or it could just be that it is blocked to the extend that it will pass enough fuel at low demand but at high speed when demand is greatest it can't cope.
i've seen this before .;you rev the bollocks off it all day long in yer drive and it will be fine, you take it out on the road ,its fine. then when you try to accelerate hard of even just get up to a decent speed the things just dies.
as you can't really recreate the fault in a garage the only way is too bite the bullet and get that tank off for a proper look see.
that is if you have checked everything else atleast twice.

slob · May 17, 2006

discomania said:
Does your lift pump work properly?

I had a similar problem, it was the lift pump.

To test this, with the engine off, diconnect the fuel out pipe from the pump, and give it a few tweeks on the lever, if no fuel comes out then give the engine one crank (literaly one tiny blip on the starter to move the cam shaft to the opposite position) then give it another little tweek, if still no fuel coming out then you have a deffective lift pump which needs replacing, easy job and fairly cheap.

does the 2.5 td have a cam operated fuel pump??(series dude)

garfie · May 17, 2006

Thanks for the help, I'll try out the lift pump and get back to you. I'm just glad that you can confirm it aint the dist. pump.

If I can't get this sorted, anyone want to buy a Land Rover??

Regards,

discomania · May 17, 2006

I agree with you slob, but I had a gubbed lift pump and it actully held out OK, acceleration at speed and high speed particularly on inclines was when it was most apparent. All I can think of is that the lines maintained a good primed pressure, and the injection pump managed to pull the fuel up...

garfie · May 18, 2006

I checked the lift pump yesterday and it does seem a bit "tired". I'm no great mechanic, but after slackening off the banjo nut on the fuel filter, I pumped it for a while. Now, I would assume that I should get a good flow of fuel, but at best all I could get was a slow trickle. The pump lever seems to do nothing for the first two thirds of it's travel.

So, I've ordered a new one anyway. seemed a good price too from johncraddock.co.uk, £31 including vat & postage. I'll let you know if it solves the problem.

Cheers,

discomania · May 18, 2006

It should blast out everywhere, this pumps job is to completly overwhelm the injection pump with fuel, thats why there needs to be a return on the IP as there is so much fuel.

I think thats what your problem was, so hope it goes well.

ormus · May 18, 2006

you can check if its the tank prob. bypass the tank using a clean gallon can with some fuel in it and connecting it direct to the pump.
EDIT ( via the filter. clean?).

secure the can, somewhere inside the engine bay (eg).
then go for a test drive.

discomania · May 18, 2006

If you say the lever is useless untill about 2/3 then that would suggest the connecting rod is damaged, bent, or has fallen out of its connection point.

garfie · May 28, 2006

Hi All,

Just thought I'd let you know, I've managed to sort out the fault. "Discomania" had it right, it was the fuel lift pump. It's been a while I know, but I had to wait for a bit of dry weather. Anyway, I've managed today to sort out the lift pump, fit a new clutch slave cylinder, new master cylinder seals, new air filter and I even managed to co-opt my son into slapping a bit of Hammerite onto the pedal box while it was out!
So, thanks to everyone for the advice, it's been much appreciated.

discomania · May 29, 2006

Nice one, sounds like a good days work, now you will feel as if your Landy has a new lease of life!

fuel starvation

garfie

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discomania

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slob

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slob

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garfie

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discomania

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garfie

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discomania

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ormus

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discomania

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garfie

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discomania

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