Range Rover 3.5 Litre (non cat) diagnostic checklist symptom 5
ENGINE STARTS AND IDLES OK BUT SOMETIMES DIES THE MOMENT THE ACCELERATOR IS PRESSED. Restarting can be accompanied by clouds of black smoke.
5a. Check for wiring loom damage at throttle body linkage. There are rare reports of wiring damage caused by throttle cam chafing loom which intermittently earths injectors-to-ECU wiring causing continuous operation of injectors.
5b. If above checks out OK then ECU faulty.
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