New member. Great site. Have read all your posts so far for related problems re my Renault Clio 1.5 diesel 2004 and followed advice on site but now stuck. Replaced imobaliser sensor had the diesel fuel pump and fuel injectors totally serviced, TDC sensor cleaned not yet renewed, ECU sent for testing found to be faultless. Need to know what other sensors to check before checking the wiring loom. Will not turn over or even start when cold as pre heater warning not on. Occasionally lights up and starts works for a day or two then shuts down altogether when driving in town or on highway so no pattern. Waiting for new hazard warning light switch to arrive as this was faulty. Any suggestions.