Why is my citroen dispatch surging for fuel - 2006 Peugeot 604

SOURCE: Citroen 2.0 Hdi surging and black smoke

which is standard or the best motor oil for HDI?

SOURCE: Does anyone know where is

engine temp sensor is part of your exhaust.

there should be one in the engine compartment screwed in to the exhaust manifold and there there should be at least one more under your care on the exhaust pipe near the catalytic converter. some vehicles also have one near the back of the car past the converter to record exhaust readings but this is usually for trucks and larger vehicles like SUV's and vans. if you are having an issue with your sensor connect a code reader to your car and pull up the error code to find out which sensor is faulty. you should be able to look online for details on which code reference to which sensor, and then just buy a new sensor and replace. advise not trying to clean the sensor as the cost versus possible damage you can cause is worth just getting a new sensor.

tp remove it usualy takes a flat head screw driver to pop off the electrical connector and a wrench to unscrew the sensor from the exhaust. simple procedure with a ending of self satisfaction on not paying 200 $ to have someone to spend 15 minutes to turn a wrench on your car.