Hi all. I bought a new (to me) Focus which I love, but it comes with a problem. Well, actually it has a few which have surfaced, but the one which needs sorting is the cloud of blue smoke when cold.
When I start the car in the morning or if it's been sat all day at work (so when it's cold) there is a large ploom of blue smoke which last around 20-30 seconds. The car often struggles to get started, requiring around 5 seconds of cranking and a bit of throttle. She then runs rough and sounds like a bag of spanners, but after 3-4 minutes of driving the idle smooths out. After this the car is a pleasure to drive and is very responsive but does - on rare occasions - lose throttle response, drop to around 500rpm then cut out. She also 'surges' and hesitates at lower speeds.
My startup procedure is to turn the key and let the plugs warm up 20-30 seconds, then crank and start. I then leave the engine running a couple of minutes and pull off. This doesn't really seem to make a difference
Work so far has consisted of:
- A full service including new fuel filter
- Replacement glow plugs as all were reported as not working
- All new injectors as the ones in the car were reported as having faults
None of this work has changed anything so I'm obviously broken and gutted about the costs.
I know the car has had its DPF filter taken out and it has been remapped. No work has taken place to repair that, but surely this wouldn't cause problems? I know the garage that discovered this said there was a lot of "back pressure" in the exhaust?