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Help! My daughter has a F150 that was diagnosed as needing a new regulator... Symptoms were that it would start on CNG (easily) when cold, and would run fine until you turn off the engine (for an instant or for an hour) then it would crank and fail over to run on regular gas.
Now I'm glad that CNGparts gave me the opportunity to put in an affordable regulator (I refused to pay the ~$1K many months ago that I was told it would cost from Ford, even if one could be found).
With the new (used P71-100) regulator, the truck started up first crank and I drove it for a short while, stopped, and it restarted fine... I thought I was good to go until my daughter drove for a bit longer, stopped at a store, and had the same problem trying to restart the warm engine.
Has anyone ever seen this type of behavior and have any ideas for further troubleshooting? Thanks!
Now I'm glad that CNGparts gave me the opportunity to put in an affordable regulator (I refused to pay the ~$1K many months ago that I was told it would cost from Ford, even if one could be found).
With the new (used P71-100) regulator, the truck started up first crank and I drove it for a short while, stopped, and it restarted fine... I thought I was good to go until my daughter drove for a bit longer, stopped at a store, and had the same problem trying to restart the warm engine.
Has anyone ever seen this type of behavior and have any ideas for further troubleshooting? Thanks!