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Matt
Matt, Mechanical Engineer
Category: Ford
Satisfied Customers: 20591
Experience:  BEng hons Mech engineering, in auto industry 22 years
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Hi my Ford Mondeo Titanium x 2lt tdci as i was driving overtook

Customer Question

Hi my Ford Mondeo Titanium x 2lt tdci as i was driving overtook slow car all of a sudden lost power and will not start
Submitted: 2 years ago.
Category: Ford
Expert:  Matt replied 2 years ago.
Hello



This could be a wiring issue as things tend to expand when hot and its possible a poor or partial electrical connection is being pushed apart on one of the major sensors so check the connection plug and wiring to the following;
Airflow meter
Crank position sensor
Cam position sensor
O2 sensor
Throttle pedal position sensor


Also worth checking the connections to the fuel pump for the same reason - unplug each in turn and give them a good squirt of switch / contact cleaner - Not WD40

and also unplug and inspect the main power relays and fuses for signs of overheating or corroded terminals - so the ones for the ECU and the fuel pump

And also unplug the wiring loom connections in the engine bay one at time and inspect for corroded or recessed pins.
also check for any oil on the end of the sensor wiring looms as you can get the situation where oil enters the wiring from a component that is leaking, into the wiring harness andyou then have to replace the component and clean or replace the wiring
.Usually this can short out a data circuit or control circuit and can cause issues like this here

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    Matt

    Mechanical Engineer

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