Good advice,as usual.Hi, the main purpose of a chip tuning is not fuel economy but more power and better throttle response on originally sluggish engines like the td5 for example which IMO should not be a problem on a tdv6 provided it's management and engine are ok, better leave it alone from this point of view and investigate why the consumption is high if it's more than normal , i'm quite reluctant about the fairy tales of noticeably reduced consumption gained this way
Despite a plethora of extravagant claims by those who sell them re-chipping is a big risk, lots over here in all sorts of CRDI powered 4X4's have been caught by the "bolt on goodies" bug, re-chip resulting in high EGT's destroying turbochargers, and general engine meltdowns. The guys who designed and built your car put a lot into optimisation for all types of use. Unless you are building a race/competition car, I reckon stay with stock and put your money into keeping it well maintained with good fit for purpose tyres/suspension etc.
The extra money you will have spent on the chip will not be reflected in what you MAY save on fuel, if indeed anything, and if the meltdown happens don't expect that the chip supplier will cough to the bill, you may end up in a very lonely place.
I'm not an expert on nanocom, but if it were that easy, and gave a significant benefit without any drawbacks - wouldn't everyone with a TDV6 want it done? Perhaps i'm wrong, but generally for everyday use and a long life plus resale valve a well maintained stock example would be the way to go. IMHOIs it not possible to get some remap files from somewhere and swap them using a nanocom?
Is it not possible to get some remap files from somewhere and swap them using a nanocom?