I recently bought a ford mondeo zetec reg 03 1999cc and now have problems which garage cant resolve. after a while on motorway car decelerates and cant get above 30. But when garage has a look they cant replicate the fault after its been sat overnight. I have been towed back by breakdown company who said the diagnostics said its was something to do with a fuel sensor. Garage cant find that to be the fault.
Can anyone give me some idea what should be looked at. Please