Discussion Starter · #1 ·
Just returned from extensive vacation up north and west, towing a 12K-lb 5th wheel. About half way, the fuel pump (I assume) started "growling" during a long day, and thereafter as soon as I had the switch in START - I can't remember if the pump is ON with the switch in ACCesories. Can someone remind me that the pump is DC hot battery, and does come ON in START? It was so noisy that I could hear it over traffic and other road noise sometimes, and I feared the worst. It persisted most of the last half of the trip, at various levels of noise. Now, after setting in the north TX heat for a week, there is no such noise at any time - yet. I'll tow again soon, but probably not for several hours a day (and rarely turning OFF the engine, due to hi-idle mod) like during the vacation. If I can't get it to "speak up", is there any chance the techs will be able to find a problem? I would have changed fuel filters as soon as it appeared, but I wanted to duplicate the problem here at home with the present filters.