159 1.9 JTDM economy
I wanted to ask if anyone has any suggestions as to how I might improve the fuel economy of my 159 16V JTDM (150).
I had it remapped last October to delete the EGR, which is the single best thing I have done with it since I got it. At the time, I had it remapped for economy as I've never been impressed with the fuel range of it, and I'm happy with the power. Besides it's given trouble, and the last thing I wanted to do was increase the engine power and run the risk of more problems. I didn't remove the DPF.
It did make a difference, to the extent that it was doing very nearly 600 miles per tank, mostly open-road driving. However, recently and for no apparent reason it has plummeted to about 500 in the same driving conditions. I've changed the oil, which made no difference (as if it would have).
I'm baffled by this.