Right guys advice is much needed, I have a classic with a tdo5, yellow injectors, hks mushroom,full de-cat, walbro fuel pump, running 301 bhp. Mrs drives it daily to work which is roughly 10 miles a day, safe to say she don't boost it, I drive it Tuesday nights and weekends now we only get about 100-110 miles out of a tank, what's happening??

 

As it been mapped?
Version?
Other mods?

 

Yes mate simteck