TD5 misfire on start up occasionally on idle

Hey guys 04 defender starting to fall apart!

Need some help. Td5 started to develop misfire on start up (regardless if engine hot or cold) and also will misfire if sitting at lights at idle too long with the accompanying smoke from tailpipe. After the misfire goes back to normal for another minute or two. No problems under acceleration or when car moving at all for that matter..

I have checked ecu under seat no obvious engine oil but possible coated in a very thin greasy layer of something... Wiring looks clean. Injector loom changed last year.

What should I check when I service it next weekend.

Thinking tappet off check harness at injectors, harness connector to main loom. Possible check the fuel and air purge valves on fuel filter housing, check engine timing positions at crank and camshaft..

Any other possibilities? Do these sx match injector seat problems or bad fuel pump? Fuel pressure regulator seems dry from outside.

Should I blast the ecu with brake clean anyway?

Thanks in advance I will try get hands on a scan tool that is actually compatible with the ecu in meantime.....

Hi. First of all you should se if there are any fault codes logged... untill then see how it runs with the MAF unplugged

Hi checking the harness doesn’t do much, it must be replaced.. look at the fault codes but sound like the harness, unplug at the head and check for oil in that connector

Ok codes are in guys and gals....

83 high speed crank synchronisation lost fault.
136 injector 2 open circuit detected
141 injector 2 short circuit detected.

After clearing and starting up several times the only code I could get it to re throw was the first one (code 83)

Any thoughts or comments?

Planning on buying some brake clean and blasting ecu and checking all connectors... Anything else I should do?

Kind regards

Check the crank sensor's connector to not have loosen pins and if it's OK replace the sensor, also check the ECU red plug for oil and if you find any replace the injector loom

Case solved.

Removed air intake pipe into air box to get better access the crank sensor located around 10 O clock on bell housing if viewed from direction of engine.

Removed plug and 8mm fastener sensor to bell housing and then removed crank sensor. Covered in mixture of oil and coolant. Washed harness plug and sensor in contact cleaner. On harness side exposed wires going into plug. Put on electrical tape.

Reassemble and no miss fires as of yet.

Thanks for all your help and hope this post helps someone else in future.