2.5 d Overfuelling

[roscoe07]

I have a D40 2.5d auto with 308k on it. It had a burst hot pipe which led to the DPF needing to be replaced. That done it runs fine. However instead of getting 550ks to a tank round town i now getting 350k. It smells like its overfuelling to me and i getting smell inside car. The exhaust has been checked and no leaks.
I have cleaned the MAF and MAP sendors. The MAF had oily residue on it.
It has been on a dyno and no codes. It did have a perished MAP pipe which was causing overboost and that was replaced.

My questions are:

Could it be the O2 sensors on the DPF?

Could it be the engine coolant sensor telling the computer engine is cold all the time?

Any suggestions would be appreciated.

 

[Old.Tony]

It absolutely could be the sensors on the DPF. You should visit this thread and talk to auggie about the sensors. The replacements are a lot cheaper than a DPF and they fix the problem permanently. Mine were replaced with auggie's several years ago and it's still running like a train.