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i have replaced the tube and the sensor this morning went out to test it out and it still was surging. i thought that replacing them would fix it what else could be the problem
getnbz - I've got the same issue. I really noticed it this morning (my first winter with a 7.3), but from what I've read, its common. Could be misreading here. It has dropped to low 30's to high 20's here over night. I let it warm up for 15 minutes this morning and it didn't seem to help. The valve seemed to cycle on for 3 seconds, then off for 3 repeatedly even while driving. Once I got to the interstate, about 7-10 miles, in quit. So this means if you are having a problem, then I'm in the boat with you.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.