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Freelander TD4 running rough

Wednesday 5th April 2017
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Freelander TD4 running rough

 

We have had several instanced of customer reporting poor performance, stalling and rough idling, and poor starting on the Land Rover Freelander range with the TD4 engine. This engine has been used in the Freelander since  2001.
    Fault codes present report fuel pressure range and performance issues. After the usual back leak flow tests on all injectors, technicians are replacing the fuel pressure sensor. But this has not cured the symptoms.
    After some research at the helpline, a Technical Service Bulletin (TSB) was retrieved on this vehicle for a known problem with the fuel pressure sensor issue.
    As well as replacing the pressure sensor, a new loom is required. It has been found that the connection to the multiplug may suffer from corrosion. The loom will need to be installed for the pressure sensor by removing the terminals at the ECM multiplug and running it to the pressure sensor, completely eliminating the original circuit.
    The complete TSB, with pictures of the required repairs, can be seen on TechTips.ie. Service Bulletin LTB00052 - repair time allowed for this operation is 0.6 hours. But we would consider this a little short on time, as removal of the ECM pins can be a little time-consuming.
    Parts required: Loom repair   YMQ503320 and Sensor STC4768
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