my dads got a escort td(96) on a p plate,since the weather has turned a bit colder hes having trouble starting it,battery in good condition,power going to glow plugs,glow plugs working these have been tested out of the car,engine spins over,although a little slower than usual,the funny thing is i can start it no problem with easy start and it will run perfect all day until its stood over nite,any help would be great,thanks in advance.