Diagnose my dirty diesel starting issue (Ford Focus content)
majormantra
Posts: 2,094
To save humiliation on the car forums (where my ignorance would be embarrassing), I thought I'd try here...
My Focus estate (2003 1.8 Duratorq TDCi) is hesitant for the first start of every day. The engine turns over ~5 times before it starts, sometimes catching once but failing to start. It still always starts on the first or second try though.
It doesn't seem to be temperature dependent, and even stopping the engine after 2 minutes, the second start is much smoother and more immediate, as are subsequent starts that day.
After the bad start, there's some white smoke which I take it is unburnt fuel. I was wondering if perhaps there's an air leak somewhere that's building up as the car is parked?
I've done the dash diagnostic trick and there are no fault codes, and the car runs perfectly otherwise.
My Focus estate (2003 1.8 Duratorq TDCi) is hesitant for the first start of every day. The engine turns over ~5 times before it starts, sometimes catching once but failing to start. It still always starts on the first or second try though.
It doesn't seem to be temperature dependent, and even stopping the engine after 2 minutes, the second start is much smoother and more immediate, as are subsequent starts that day.
After the bad start, there's some white smoke which I take it is unburnt fuel. I was wondering if perhaps there's an air leak somewhere that's building up as the car is parked?
I've done the dash diagnostic trick and there are no fault codes, and the car runs perfectly otherwise.
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Dual Mass Flywheel failure would be my guess. It's how mine behaved.
Could also look at dirty injectors.
Last one - fuel returns to tank overnight. When you first start do you wait for fuel lines to pressurise from the pump or just try to start immediately? Could be that there is insufficient fuel behind the injectors to allow an immediate start-up.
Not really. Apart from not starting on the first turn of the key any more, it sounds entirely normal to me. No clatters, bangs, or anything untoward.
Mass airflow meter? Isn't that on petrol models only? (I'm learning this as I go along...)
Does turning the key to the II position pressurise the lines? I think I tried waiting, but can experiment more.
check for current.
check condition.
Parktools :?:SheldonBrown
I'd bet a whole pound on that being the issue anyway. Watch out for your clutch going next.
Good luck.
I meant to add a bit about that, I agree about it not sounding exactly the same pattern, I don't recall mine being better after the first start but it was a long time ago. Hope it's not as serious for you.
I think I'll probably need professional help to diagnose this, but I'm reluctant to throw cash at it since a)the car is perfectly usable as is and b)without a clearer idea of what's wrong, I can see a garage changing loads of parts without achieving anything.
The fact it always starts second time could also point to the air max meter as mentioned above or the EGR.
A diagnosis shouldn't cost more than £40 and could save you a fortune on buying un-needed parts.
^^ 2nd this. Had similar symptoms on my (non Ford) diesel and turned out 2 of the 4 glow plugs were not working.
This is easy to self diagnose.
Turn ignition on too full (sign on but not engine running)
Hold there for 20 seconds and then turn fully to start engine.
If engine now starts on the first turn it stands a good chance that the plugs need replacing.
A silly but not insignificant thing - Injector cleaner. 'Forte' is an excellent brand. Put it in the tank and drive it for a couple of hundred miles. Debris can cause sticky injectors and all sorts of problems. It's cheap and if it doesn't work, then nothing ventured, nothing gained.
Maybe there is a problem with the return valve from the diesel pump and it takes a few turns of the engine to pressurise.
The glow plug suggestion is probably top of the list.