Range Rover 3.5 Litre diagnostic checklist symptom 4
VEHICLE BREAKS DOWN AT IRREGULAR INTERVALS WHILST DRIVING BUT RESTARTS OK. Engine cuts out whilst driving - period of cut out from 1 to 20 seconds - sometimes much longer.
4a. Disconnect cold start injector and carry out extensive road testing. If problem does not recur, then cold start thermotime switch suspect.
4b. Before condemning ECU, carry out close physical inspection of ECU wiring loom at engine bulkhead. There are rare reports of chafing damage at this point which intermittently earths injectors-to-ECU wiring causing continuous operation of injectors.
4c. If above check out OK then ECU is faulty.
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