Hi,I am quite new to this but,I have a 60 plate 2.0ltr diesel s,max,I have had it nearly 2 years now,I have had the car back to fords 3 times now,what happens is intermittent,one day the car would be fine then the next,I would start the car and it would run fine for about 10 minutes then I would notice that the main engine fan was on,there was a different exhaust note,and the engine was revving weird,it also has a loss of power,and a flat spot,I have had enough cars to no it's not right,I have like I said taken the car back to fords on 3 occasions,they run a diagnostic,and some other tests,but say there's nothing wrong,each time I go to collect the car they say they have updated the software,on the ecu,but as for the engine they don't know,I have to take it into them when it happens,that's helpful,has anyone got any advice,please,

Try a different dealer? Or an independent Ford specialist?

By the way it's "Ford" (singular) not "FordS" (plural). Ford employees get very tetchy about that.

could it be the dpf regenarating

An old thread, but....

This info may be of use to someone.

My 10 plate S Max, 140 diesel, had an intermittent start problem.

It was repaired after the 4th visit to Ford Dealer. They had it twice for 5 days.

The fault was a flap in the air inlet, which was sticking.

Hi, I have a 11 plate S-Max 2.0 163ps and have noticed that on my car as well. As Mintalkin suggested it is the DPF trying to regenerate. These engines need to go on a cruise every now and then at a constant speed so the DPF can regenerate properly. When my car does this I keep it in 4th gear and try to maintain 2500rpm on a duel carriageway and this allows the regeneration. You will notice the exhaust note change back to normal and a smoother idle return

Hi, I have a 11 plate S-Max 2.0 163ps and have noticed that on my car as well. As Mintalkin suggested it is the DPF trying to regenerate. These engines need to go on a cruise every now and then at a constant speed so the DPF can regenerate properly. When my car does this I keep it in 4th gear and try to maintain 2500rpm on a duel carriageway and this allows the regeneration. You will notice the exhaust note change back to normal and a smoother idle return

drive it like youve stole it every now and then and it should be fine.

Agree with Greg, its a case of rag it and force the regen now and then!