Running problems

[alexanderfoti]

Hi all

After doing in an injection pump, I have replaced it with a new one and now i have serious running problems.

Firstly, I couldnt rev pas 2000rpm without winding out the fuel bolt at least 4-5 turns. I thought that was a bit odd.

Secondly, and a bigger issue, is that any extended acceleration or high rpm running past 3000rpm, the engine cuts out.

If I wait a bit it comes back to life and misfires heavily, any throttle input makes it cut out again.

It will idle and high idle -2000rpm +, all day without problem.

Completely stuck and really frustrated!

[coachgeo]

? compression leak that manifest it self when engine is really hot such as Head crack or warp? Or head gasket?

? Still not pushing enough full to keep it running under load?

? slightly clogged injector lines?

? fuel lines need replacing?

? Air leak that only manifest itself when under load or when hot?

[alexanderfoti]

It does seem air leakish.

I'm going to flush the tank and try some fresh diesel tomorrow to see if it's related.

[alexanderfoti]

Right. Today I:

Drained the tank.
Filled with my reliable Veg/Diesel blend (3000 miles + on this blend).
emptied and replaced both fuel filters. (careful not to overtighten on the seals)
Remove the last 5mm of leak off pipe from the injector and re-inserted again.

I now have the bike running again, across the whole rev-range which is nice.

I do have this pretty annoying looping idle, as per this video:

I am not touching the throttle.

https://www.youtube.com/watch?v=E_n3nvb ... blew5IlLFw

Now Im thinking that there is a still an air leak in the system. I have my injector return feed T-ed into the supply pipe, which hasnt caused an issue before, and I can see no holes in the fuel pipe. Any thoughts>

[Diesel Dave]

Alex, when you replaced the injection pump, did you re-set the timing (or loose the tappet underneath the pump down into the sump).

I've done it, luckily on a Lombardini 6LD you can remove the sump and retrieve the lost tappet.

[alexanderfoti]

I did reset the timing. I also replaced the tappet along with the pump. Luckily I don't think you can drop the tappet into the sump on the l100 (phew!)

I have my timing advanced 5 degrees from where it should be for wvo.