Hello, I hope someone can help me with this ,I have a 2000 Discovery that started acting up . Truck will run great for about 5 mins and then shut off , if you let it set overnite it will restart and run 5 minute and stop again has anyone had trouble with relays that can do this . THANKS

 

How many miles on your truck, what octane gas are you running and is your check engine light on?

 

Truck has 136k on it , i have been putting 93 in it but just before this started grab the wrong gas pump and put 10.00 of 89in it and everthing running great for 5 mins and then service engine soon comes on and it quits running , thanks Mike Dave

 

The lower octane isn't causing the problem, may be dirty gas.
Go get the codes read at your local auto parts store and get back to me with them.