few months ago i managed to get a replacement trip computer display for my mk 4 as my original one was suffering from missing pixels. i didnt go to vx as they were wanting over £300 for a new one but vx parts said there was a few to choose from so i would need the part number from the failing one to get an exact match. i thought these wouldve just beed plug and play so managed to get one from ebay which had come out an astra gsi. my own astra is a 1.6 8v z16se. since i fitted the replacement one ive noticed the consumption isnt what it used to be, i could get the car up to 44-46 mpg whilst the old unit was connected but now it goes to about 42 mpg on a longer run but the shortly goes back down to the 30s mpg. seems to be displaying the car as a gutsy *******. phoned vx today to see if it needs tech 2'd in but the woman on the phone wasnt sure and wanted to book the car in and charge me for a diagnostic which she doesnt even know will work or if possible to programme this trip comp onto my astra so i just left. however theres another place close to me that has tech 2, spoke to the chap on the phone today and explained it to him and he says theres an option on the tech 2 which enables the trip comp to be re-callibrated. just wondering if this would solve my problem and if any of you have replaced your mk 4 trip comp and come across this ?
basically just want the info to be accurate like it used to be. i understand that with the display coming from a gsi that it might be set up differently.