Originally Posted by maggie

Got a 1.8 ford focus tdci diesel 2004.Always been a good starter but lately when turning ignition key to start engine the engine makes an awful shuddering,vibrating noise and continues so have to turn engine off.This seems to be intermittent though.Had to ford garage,no error codes apparently showed but they did a software update but no help unfortunately.Would be grateful for any advice if anyone else has had this problem and any idea what the possible cause might be.
Thanks.