Hi, I would be really greatfull if someone could share some of their technical knowhow with me 
..... here goes;
A couple of weeks ago the cam belt snapped on my Fiat Doblo. It's a 2006 model 1.9 JTD engine model is 223B1000. I stripped the engine down and removed the cylinder head. The pistons and block were fine and in good condition, but the cylinder head needed work. I had bent all 4 exhaust valves and one inlet valve, also damaged the valve guides and buckets. I thought I was quite competant to do the work myself but I struggled with removing the valve guides and reaming the new guides so I took the head to a specialist where he did the work for me. He did the work and rebuilt the head including shimming the cam and skimming the main face, and it came back like new. I have now rebuilt the engine back up. It went back together fine, a few of the bolts and brackets were a pain to get back on but never the less it all went back together ok. I filled the coolant and oil and tried to start it. It turned over and over without appearing to fire, this eventually flattened the battery. I recharged the battery and refitted it. This time I put a fault code reader in the port and read the fault code, it was displaying a main power train fault, so I cleared that and tried to restart the engine. It struggled again but eventually started, kicking out tons and tons of black smoke. When on tick over the van is still throwing out loads of black smoke indicating to me a fuel problem maybe? In all fairness it seems to tick over ok. But the main problem is when I press the accelerator pedal the revs will hardly increase, they rise to about 3k but take about 20 seconds to get there as if the engine is in limp mode, at the same time bellowing black smoke out the exhaust. I have run the engine up to temp and kept it running for about half an hour and it's still the same. I have re-read the fault codes and they are clear. It almost feels like the engine is being starved of air and just burning diesel. Can I just say that when I fitted the new timing belt, tensioner and roller, the valve timing was set up exactly according to Autodata, cylinder 1 TDC and timing mark at 6 o'clock, valves on cylinder 1 both closed and timing mark lined up at about 1 o'clock. I rotated the enging twice by hand and the marks lined up again exactly. Thanks for reading and any help at this point would be appreciated, thank you
..... here goes;A couple of weeks ago the cam belt snapped on my Fiat Doblo
. It's a 2006 model 1.9 JTD engine model is 223B1000. I stripped the engine down and removed the cylinder head. The pistons and block were fine and in good condition, but the cylinder head needed work. I had bent all 4 exhaust valves and one inlet valve, also damaged the valve guides and buckets. I thought I was quite competant to do the work myself but I struggled with removing the valve guides and reaming the new guides so I took the head to a specialist where he did the work for me. He did the work and rebuilt the head including shimming the cam and skimming the main face, and it came back like new. I have now rebuilt the engine back up. It went back together fine, a few of the bolts and brackets were a pain to get back on but never the less it all went back together ok. I filled the coolant and oil and tried to start it. It turned over and over without appearing to fire, this eventually flattened the battery. I recharged the battery and refitted it. This time I put a fault code reader in the port and read the fault code, it was displaying a main power train fault, so I cleared that and tried to restart the engine. It struggled again but eventually started, kicking out tons and tons of black smoke. When on tick over the van is still throwing out loads of black smoke indicating to me a fuel problem maybe? In all fairness it seems to tick over ok. But the main problem is when I press the accelerator pedal the revs will hardly increase, they rise to about 3k but take about 20 seconds to get there as if the engine is in limp mode, at the same time bellowing black smoke out the exhaust. I have run the engine up to temp and kept it running for about half an hour and it's still the same. I have re-read the fault codes and they are clear. It almost feels like the engine is being starved of air and just burning diesel. Can I just say that when I fitted the new timing belt, tensioner and roller, the valve timing was set up exactly according to Autodata, cylinder 1 TDC and timing mark at 6 o'clock, valves on cylinder 1 both closed and timing mark lined up at about 1 o'clock. I rotated the enging twice by hand and the marks lined up again exactly. Thanks for reading and any help at this point would be appreciated, thank you