Hello. My name is Mark and I will be assisting you today.
The next thing to look at would be the engine temperature sensor. Also the injectors should have been coded to the ecu when they were replaced. Was this procedure carried out?
If not, then the engine will run rough.
Hi Mark thanks for helping, they are the siemens injectors which according to essex diesels don't need programming just the bosch and delphi types? I have had the air temp sensor out it looks fine is there any way to test it with a multi meter etc?
The engine temp sensor is coolant based, not the air temp sensor.
Is it separate to the gage sensor as the temp gage is working as per nomal
Yes it is
Then not tried that one yet is there a way to test it?
Easiest way is with a scan tool that shows live data.
If the reading is say -35 or +140 or if the actual reading doesn't correspond to what it should be. ie a cold engine but the sensor reading say 60 deg.
I do have a latop based scan cable which shows live data but would have to try that tomorrow now, Are there any other parameters i should be looking at while i'm at it?
Injection duration for all injectors.
I'm guessing they should all be the same reading?
You can also try expose yourself to the exhaust gas when the engine is cold. If it stings your eyes then most likely it is unburnt fuel.
I think it is definitely un burned fuel as it just hangs in the air for a fair while and smells of dieselthe exhaust is clean after a min or two ish and the car runs much better but is still a little jerky at low speeds when holding constant revs
The fact it gets better so quickly would suggest a coolant temp sensor problem. An injector problem would probably continue regardless of the engine temperature.
I have to sign off just now but will be back on later.
Ok thanks for the help may catch you later