I've been lurking a while now, especially the last few days as The Baron is playing up and we are at a loss at this point as to what's wrong. He has a JX 1.6TD engine.
He was getting increasingly smokey the last year and then wouldn't start two weeks ago. We'd suspected the pump for a while so replaced that. Then he would start eventually after much turning over and eventually firing. He will start reasonably well when warm (after a few turns of the starter motor) and runs really well (better than ever) when he's going. It's that initial cold start that's killing the battery.
In an attempt to fix it we've now changed three out of four injectors (not the forth as this will require moving the pump and then redoing the timing), new braided pipes between pump and injectors and a new fuel filter (screw in jobby). There is no visable leaking and we are reasonable certain the timing is good - two mechanics did it together and both are happy it's not that.
But he's still no better.
I can see air pulling in from the filter when revved, so as Kit suggests, a non-return valve will be the next move. But on switch off, there doesn't seem to be much sucking back. Although this might occur in small amounts when he's sitting and we aren't looking
Should air get in? Any air? I thought the filter already had a non return valve inside??The mechanic next door has fiddled with the screw and bolt/nut on top of the filter housing (sorry, I have no idea what this is) and is surprised that no fuel seeps out even when fully open. Is this normal?
Any ideas at this point would be very gratefully explored!
Em
- but he's abroad at the mo). If it is glow plugs that are an issue, would it ever start? Just wondering?
The 6mm was bang on btw but you probably all already know this 
I'm sure this will all mean loads to him. I however am lost. 
Oh well at least that long list of stuff the OH hadn't got round to is now done 