Need to advance injection - but there's no adjustment left!

Hello all
Wow, first post! And to think I've got so close to the end of my Series 3 rebuild without resorting to forums, it's either a triumph or a shame, I've not decided yet.

Anyhow, the mongrel is nearly complete. A galvanised chassis with the best bits salvaged from the scraps of two dead Landys bolted on. I'm pretty pleased with it all in all, pics will follow once it's done.

In the meantime I have a problem with the engine, a five-bearing 2.25 diesel. It's showing all the symptoms of injection timing that's too far retarded. White smoke with the occasional "Chuff" from the exhaust, sadly it's too much smoke to pass the MOT. Oil and water uncontaminated, fuel fresh and valve clearances are spot-on so it seems to be the timing.

So I tried to advance the pump by 1mm at a time by turning it, but it's already at the limit of its adjustment and will go no further. I thought that wear in the timing chain and sprockets might be a cause of this but I've checked them with a DTI and it's absolutely spot-on.

Does anyone know what the most probable cause/fix for this problem might be? I'm suspecting a worn bush or drive gear between the canshaft and injector pump but I'd rather not go pulling things to bits without certainty. I've already wasted a chilly and oily day checking the camshaft timing so I'm still smarting from that.

Any help would be appreciated!

Henry

Aaaand.. I've posted this in the wrong thread. Just moved it to the Engines one.

It does indeed sound like the pump needs more advance,

When you re-built it I presume you re-built the engine...setting the timing gears is not an easy job as you prob know on these engines there being no timing marks and having to use the DTI on the valve rocker...cant remember which one as its many years since I last did mine...but a quick look in the book would tell me,

Did you have any probs setting it up...it easy to be a tooth out...this will give the symptoms you have...running out of adjustment,

A real bodge but I have known people to elongate the slots to give more turn,

So what method did you use to time the engine.

Nick.

It sounds like the timing is out, if you changed the timing chain there are about 6 positions on the cam sprocket to get them right. With the EP mark correct with number 1 exhaust valve fully open it is still possible to be 4 degrees out. You need to ensure that the cam is in the mid point. If you have altered the skew gear drive to to pump then that is another story, they can be a bugger to set. I don't advise elongating holes it is a bodge and will never overcome the real issue.