Recently had the front coil springs replaced on my Fiesta after the offside one broke. The car has done 76000 miles. When I picked car up from garage the steering was very firm and did not centralize, the garage checked it and have replaced the suspension mounts thinking this could be the problem the steering is the same. They check the tracking and wheel alignment and the steering universal joint no problem. They are at a loss and are now talking about stripping down the steering rack. PS the car has power steering. anybody have any ideas