start running shell gas through it....

 

I have the same problem and as far as i can tell its the upstream o2 sensor aged or going bad and the downstream sensor is setting the code 1171 or 1174 or both. I cleaned ot my intake with carb cleaned and belive this damaged my o2 sensors.

 

my lr 2 starts beautifully when cold but if i start it and drive it for about 30 minutes then park it for about an hour and try to restart it takes multiple times to get it going and it behaves like my truck and it was solved with draining the gas, adding a fuel injector and filling the gas tank back up. could i have bad gas and i forgot to mention this vehicle sat up without being driven or started for about 4 months. any suggestions most welcome!