HI IM PAUL. XJ300 1987 63K ON THE CLOCK. £1000. "A BARGAIN" OK FIRST IT TURNS OVER BUT TAKES A LIFE TO FIRE. CHEAPEST PRICE THEN MOVE UPWARDS. 1st HEAT SENSOR GO ON LINE DO YOUR HOME WORK. £17 E BAY. UNPLUG IT BEHIND THERMOSTAT UNBOLT. REPLACE WITH NEW FIRM BUT NOT MAD TIGHT, REFIT PLUG. .. NO GOOD! MOVE ON 2nd CRANK SENSOR GO ON LINE DO YOUR HOME WORK ITS A PLUG WIRE AND SENSOR IN THAT ORDER. I GO LOCAL JAG MAN TO FIT .. THE THOUGHT OF ME FITTING IT AND ITS NOT TOP DEAD CENTRE THEN I TURN ENGINE OVER... WELL IT MAKES ME WET MY PANTS WITH HORROR. £60 FOR SENSOR £30 FOR FITTING. NO GOOD! MOVE ON 3rd ECU.. NOW IM TRYING TO FIND OUT IS IT IN THE BOOT OR THE PASSENGER WELL! WHICH ECU IS IT.. ILL LET YOU KNOW HOW I GO. WHAT I DO KNOW IS THAT A SECOND HAND REPLACEMENT MUST END WITH THE SAME SERIAL NUMBERS. AND THEY VARY IN PRICE LIKE A LADY OF THE NIGHT!! THE BAY HERE I COME. ONCE IV FOUND WHICH ECU ONE I NEED AND WHERE IT LIVES. PS THANKS TO ALL WHO INFORM I ENJOY THE READING..INFORMATION IS POWER. PAUL