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Matt
Matt, Mechanical Engineer
Category: Car
Satisfied Customers: 22258
Experience:  BEng hons Mech engineering, in auto industry 22 years
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Freelander serrengetti td4. wont start again when hot ok first

Resolved Question:

freelander serrengetti td4. wont start again when hot ok first time when cold but if you don't leave it too cool after a run and you want to go nothing its a deasel
Submitted: 2 years ago.
Category: Car
Expert:  Matt replied 2 years ago.

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

unplug each in turn and use some switch / contact cleaner spray on the pins to ensure its all grease / dirt free

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.

Customer: replied 2 years ago.

could it be the fuel pump

Expert:  Matt replied 2 years ago.
Hello its possibly a fault with the pumpand this can be tested by measuring the delivered fuel pressure at the injectors as this should be about 300psi on cranking
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