My '06 Focus 1.6 TDCi Sport has been having starting problems recently. The engine will turn over, but doesn't fire up for about 3-4 seconds. It's worse from cold start.
The glow plugs were changed last year, and have been checked as ok this week.
I would replace the battery, but not sure that is going to fix the problem, as the engine is turning over. Idling voltage measured at 13.92V across the battery terminals. Is this about right? I am reluctant to burn £100 on a new battery, to find it doesn't fix the problem.
Alternator was replaced about 2 years ago.
Took it into local dealer (not Ford) who said there was nothing wrong with it. However I disagree, as I've driven it for 5 years, and the car has been starting perfectly until very recently. Something is not right, but I don't know what it is. I'm also worried it's going to fail to start at some point because this has been getting gradually worse.
There are no fault diagnostic codes.
It's done about 88k miles.
Any ideas on probable causes for this, or anything I can check before I resort to Ford dealer?
Just another thing to add - I think I used to hear a humming as I turned the key (fuel pump starting up?), and I hear nothing now. Could the fuel pump have broken? Also, where is the fuel pump, because I believe that the fuel tank doesn't have an integrated pump. Is that right?