They know what's best but in having to meet the ever more stringent legislation and provide good mpg figures they are tuned as lean as they can be which often means they don't run as nicely as they should. A case in point is the 1.5 petrol recently produced by the VW Group which has issues with pulling away etc.72 dudes wrote: ↑Tue Apr 14, 2020 11:32 pm Nope, not naïve at all.
I suppose there must be a market for tuning but as someone once pointed out, surely the car manufacturers, who invest millions into the optimum tuning and specifications of their engineering efforts, would know what's best.
The tuning box for the T4 sounds like it upgrades the power to a T5.
Many folks who have had cars tuned say that it improves the drivability with the bonus that the extra power means that fuel consumption is improved because less throttle is used.
Years ago my brother used to work for a garage when cars had carburetters and sometimes customers complained that their cars weren't running very well. The answer was to richen the mixture up a bit and the cars were transformed and drove as they should.
Chris