my 1998 td gal as a lack of power so much so that on some roads iam down to 2nd gear where she used to pull 4th easy all was fine we started to lose power so i changed the fuel filter all was back to normal then about 3 weeks later the wife had the glow plug light flash for about 5 mins on her way home so of we went and and had codes read only to be told we have a problem with the key remote alarm when i told the garage we do not have remote lock/alarm we were told that it was a code reader fault .???? and galaxys never rev above 3500 revs and we must have been lucky she would do over 80 mph in the first place please help i have just given her a full service changed all filters ,checked all pipe work, brakes ,injectors,timeing pump ect but still no change