extreme power loss
- Thread starter Bayden_uk
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See if it rolls freely on a gradient (hill)
Or see if drum hot after a run
haha thats it! keep em comin!! writing my list as we speak!
it dose role freely when its on a slight hill, but ill have a feel of the drum when i get to work tomorow an see if its hot
ello mate. finaly got a day free to have a look and try everythihng you all directed me to. im a complete novice, do you have a picture or anything to show me where the banjo bolt is. cheersJust one more thing to check and it's cheap....there is a small filter inside the banjo bolt that bolts the fuel return pipe to the back of the pump. Worth taking it out and cleaning the small gauze filter inside the shank, it's only small.
keep you busy.
Ben
Karlos28
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my guess is fuel, you wouldnt notice a boost leak until the turbo was boosting, but im assuming it barely revs from idle? if you jack the baqck up and spin both wheels in one direction, thatl tell you if the handbrake is on. or just jack one wheel. otherwise your just spinning the diff.
i think its fuel too. you can hear the engin when its idle stugling slightly. in trying to solv the problem i started from the fuel tank and made my way to the engin, there was a slight change but only slightly. still got a big loss of power. im having to drop down to 2nd on the slightest hill where it would usualy do it in 4th.
i tryed spinning the wheels and they were fine. both spinning in oposet directions.
Ben
Karlos28
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they will spin in opposite directions even with the handbrake on (i think..? HA!) coz it just spins the diff. get a helper and spin them both the same way at the same time, then it will turn the prop and therefore handbrake.
could it be the fuel pump?
could it be the fuel pump?
i changed the lift pump. slight change
Karlos28
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very odd...
thinking maybe a block in the line. the landy was sitting idle for 3 years. maybe crap built up at the bottom of the tank an its just blocked it
Karlos28
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ahh yeh probs, clean all the lines out then! next job for you!
ok all i know its been a while but it looks like i located the problem. lifted the hood and i could smell doozle! looked at one of the leak-off pipes there there it was p!$$!ng all over the place (this wasnt the original problem, this happen while i was crossing a field) anywasye i tighted the leak off and alot of my power was back, but not all of it. i decided to bleed the injectors and there was nothing but air for a little bit then the doozle starting spraying out (more power back to the engine! ) after a day of driving and left over night things were back to being a slow coach. today i was bleeding the injectors again and there it was again, more air in the system.
where would you start?
cheers all
Ben
) after a day of driving and left over night things were back to being a slow coach. today i was bleeding the injectors again and there it was again, more air in the system. where would you start?
cheers all
Ben
pos
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ok all i know its been a while but it looks like i located the problem. lifted the hood and i could smell doozle! looked at one of the leak-off pipes there there it was p!$$!ng all over the place (this wasnt the original problem, this happen while i was crossing a field) anywasye i tighted the leak off and alot of my power was back, but not all of it. i decided to bleed the injectors and there was nothing but air for a little bit then the doozle starting spraying out (more power back to the engine!
where would you start?
cheers all
Ben
There are quite a few things that you can check with regards to air in the fuel lines. Bare in mind that the fuel line up until the lift pump inlet is under vacuum, where as the fuel line from the lift pump up until the injectors is under pressure. The pressure created at the lift pump exceeds the vacuum / draw created by the supply pump inside the injection pump. The spill rail from the injectors is also under pressure, expelling excess fuel created as a 'by-product' of the immense injection pressures. The spill rail then flows back to a banjo at the rear end of the injection pump, where a calibrated return feed from the pump sends the whole lot back down the return lines to the fuel tank. The injectors will not produce any 'leak-off' (fuel into the spill rail) whilst the engine is idling, and they should only pass a little fuel when the engine is under load. In theory though, the entire fuel system should be sealed and primed with absolutely no air in the lines, this includes the fuel filter.
You effectively have a pipe in the fuel tank at the beginning of the system, and a pipe in the fuel tank at the end of the system, so no air can get in and no fuel can get out - unless you have a gap somewhere which is small enough to let air in but not fuel out as so to speak. The non-return valve in the lift pump should work well, because fuel will only work it's way back down the fuel line if air can get into the system at some point after the lift pump and the same volume of fuel can find it's way back down to the tank, which the non return valve is supposed to prevent. How well they work in principle, I do not know but you can test it by pressing your thumb over the inlet side of the lift pump, whilst manually pumping it. When you remove your thumb, it should create a nice sucking / popping sound. If it doesn't, it will be drawing air into the diesel via the cylinder block and potentially ****ing diesel back into the engine (so keep an eye on your oil level).
I'd be looking at the vacuum side of the fuel lines first, so from the fuel tank to the lift pump inlet. I am currently having a similar problem myself.
-Tom
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pos
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Haha will do. Which 'end' are you starting at? I'll do the return side if you do the pickup (no weird, gay sounding perverse sexual fantasy intended)
pos
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hahahahaha pickup is working from the tank to the lift pump right? if so then ill start there mate an we'll see what goes on
Yeah. To be honest, it will be the slightest, most ridiculous little leak somewhere, so it might pay you to replace absolutely everything. I have some really thick marine fuel line with fuel hose clips and its still getting in somewhere. I expect (as suggested by Buster too) that it is an olive / copper washer somewhere.
-Tom
pos
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That's one hell of a ball-ache and it's still not guaranteed to work! In fact, I'll put money on it not working.
