Fat Slob
Member
I have 04 Expy with approx. 190k miles. Engine was replaced with 5.4L Jasper about two years ago (35k miles on it give or take)...
Most of the coolant leaked out so firestone replaced the cracked hoses and thermostat about 2 months ago.
Since then, truck has intermittently gone into fail safe mode, always on highway at 60mph + it seems. After resting a few minutes truck does start and runs as normal and sometimes shuts down again and other times it makes it to destination no problem. It was having the same issue even before the hose/therm repair was done if I remember correctly.
AFTER firestone replaced all that, I had a puddle of coolant in my driveway on one and only one occasion. After refilling it there has been no leaking and level has remained constant. I brought it back to firestone and they did pressure test on whole system and said everything looks and tests fine. Mystery.
Any suggestions on what I should do/try? Greatly appreciated.
Most of the coolant leaked out so firestone replaced the cracked hoses and thermostat about 2 months ago.
Since then, truck has intermittently gone into fail safe mode, always on highway at 60mph + it seems. After resting a few minutes truck does start and runs as normal and sometimes shuts down again and other times it makes it to destination no problem. It was having the same issue even before the hose/therm repair was done if I remember correctly.
AFTER firestone replaced all that, I had a puddle of coolant in my driveway on one and only one occasion. After refilling it there has been no leaking and level has remained constant. I brought it back to firestone and they did pressure test on whole system and said everything looks and tests fine. Mystery.
Any suggestions on what I should do/try? Greatly appreciated.