I just brought my 110 (200TDI from a Discovery) out of a 2-year storage. It ran great before I put it in. It now seems to be running at about 75% power. I, of course, changed the fuel and air filters before starting. I have since checked all the airways to the manifold and checked the turbo has pressure. I ran injector cleaner straight from the fuel filter through the engine. Replaced the lift pump (because, why not). I removed and cleaned all of the injectors and they have good spray patterns. But, it still needs almost a quarter throttle to idle smooth and doesn’t seem to rev all the way at full throttle. Any ideas are appreciated.
200TDI lacks power
- Thread starter Curly15
- Start date
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300bhp/ton
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Air leak maybe. Fuel hose can perish.
Certainly a good possibility. I have no idea how old the hoses are. I have looked for obvious leaks from the tank forward with no luck. I may just replace all of the lines. If I just keep replacing things, I’ll eventually find the problem. Not the preffered troubleshooting method...but a method nonetheless.
zeaphod
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Are you sure the fuel you are using is decent/recent? a bit obvious, but it can make a big difference.
Hicap phill
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You sure it's not the lift pump?
Could be slow & not pumping enough
Could be slow & not pumping enough
Hicap phill
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Have you replaced the spill pipes between the injectors? These can perish & allow air.
bluedog333
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Bung a bottle of fuel system cleaner/additive ( Millers is quite good ) and take her for an Italian tune-up.
Before you do anything remove and check the two large fuel pipe banjos as one is full bore and the other has a restrictor built in (not a lot of people know that!), Im not even sure if it would run if you mixed them up but got to be worth a look? the restictor banjo goes on the pipe that has the return pipe from the injectors on.
The idea of the restrictor is so the inj pumps internal vane fuel pump keeps the pressure up in the inj pump itsefl and I think 70psi.
Im sure I read somewhere that a tdi owner had a blocked fuel return pipe into the tank and this caused running issues, again got to be worth a look.
The idea of the restrictor is so the inj pumps internal vane fuel pump keeps the pressure up in the inj pump itsefl and I think 70psi.
Im sure I read somewhere that a tdi owner had a blocked fuel return pipe into the tank and this caused running issues, again got to be worth a look.
Yes! Great idea, and I’ve done that. No help so far.
I’m a bit confused on this thought. I think you are saying that a restricted return hose could be a culprit. I will certainly put some air pressure on that and see what happens. Since I have not swapped any banjos since I took it out of storage (and it ran perfect prior), I don’t theink the banjos could be the issue.
I have replaced, or by-passed, every fuel supply line and still have the issue.
If I up the idle (probably double what it should be), it idles okay. But it is certainly sitting at about 75% power at top end. I rather assumed that i’m operating 1 cylinder down. But if I loosen each fuel supply line to each injector, in turn, fuel spills out and the engine immediately runs rough. That experiment makes me think it is the internals of the injector pump that are clogged (due to storage). If anyone has thoughts, I’m all ears. My next step is to pull to pump and pop it open.
I live on Aquidneck Island in Rhode Island, and the truck runs fine to get around locally, so I’m in no hurry - speed limits don’t exceed 40mph here. But, I would like to solve this conundrum.
Sorry I missed the bit about storage and running fine before.
Have you checked the small sliding pin at the bottom of the tapered fuel pin?
Had that seize on mine due to water ingress, was certainly down on power, dont remember any idle issues though.
Theres some useful Bosch VE inj pump vids on youttube
Thanks again. I had checked it, but took it apart again to confirm and the pin was moving freely. I think I may have it sorted for now, but there is still a bit of confusion on my part. After going through everything else, I decided to adjust the main fuel adjuster; and after increasing that, I am back to full power and a good idle. My question remains “why would I have to do that?”, and my belief is that there is something gumming up the internal workings of the injector pump. But, right now, it is running like new, so I will stop fretting...until something else goes wrong.
Well we have recently bought a new to us boat, lucky for me the previous owner had to fit a new injector pump and injectors as the pump had broken an internal bracket that is NLA from Bosch and the cause was fuel bug seriously blocking things up, the pump is the Bosch Ve unit but on a N/A engine so no boost capsule.
The poor sod was in the north sea and had only owned it for a few hours when the engine died!
So every can of fuel also gets a treatment of fuel set/stabiliser as Im not forking out 2k for pump and injectors.
