my 2003 ford focus has a problem where the engine shudders and shuts off when while driving, especially when pressing the accelerator pedal hard. If the engine stalls, it often roll starts itself back up (like a manual transmission car does , mine is automatic.) I changed the fuel pump twice, and there is no check engine light. My guess is there is a loose electrical connection or relay to something critical, or perhaps a bad camshaft sensor . I don't think a spark plug or injector is the issue because it does not have the rumbling feeling of a single cylinder problem and the whole engine shuts off while driving. the multifunction warning light comes on.