Hello, I've been working hard to find a Professional to assist you with your question, but sometimes finding the right Professional can take a little longer than expected.
I wonder whether you're ok with continuing to wait for an answer. If you are, please let me know and I will continue my search. If not, feel free to let me know and I will cancel this question for you.
Thanks Shantal, I did not not expect to get an instant solution.
Hopefully there is an experienced Volvo service mechanic who has seen this sort of fault before.
Your Email mentions that you may require more information, if so I will do my best to supply it. Regards Bob
Hello Bob, Thank you for getting back to me so quickly. No further information is needed at the moment. I will continue to look for a Professional to assist you. Thank you for your patience, Shantal
No I have not checked the fuel supply pressure.
I could do that fairly easily if you think that pressure could be the the root of the problem.
The fact that the car runs apparently perfectly when started I had not considered fuel supply pressure.
I had wondered though if the hot diesel was less viscous and therefore less easy to compress.
I assume that the fuel gets hotter around the cylinder head wen the car is first stopped.
I will check the pressure and tell you the result.
The hot starting fault is developing into an overheating fault I think.
Now after urban driving, although the temperature gauge doesn't indicate overheating the top of the engine is radiating a lot of heat.
Once the engine is stopped and the water is not being pumped round the radiator the temp gauge gets two divisions up from the centre.
The cooling system water looks clean and has not dropped in level ever in the 15 months that I have had it.
The car will then not start until the area around the fuel pipes and injectors is cooled down with water.
Initially the trickle of cooling water evaporates from the fuel pipes and surrounding cover.
It seems to hot to be normal.
I still have not measured the tank fuel delivery pressure but the fault seems more basic.
Please let me know what is likely to be the problem.
Could an overheating problem be created by the engine management system being fed wrong information from a faulty sensor?