Fuel Tank Pressure/Vaccum????????
Like a lot of others, I seem to experience an intermittent rough idle on my 4.6. The other day, I go to take off the fuel tank cap and there appears to of been a "vaccum" in my tank....... You could hear the air rushing in when I removed the cap. After fueling, the truck seems to idle better for quite a while, then eventually get rough again, until, I remove the cap relieve the "vaccum" from the tank. Anyone else had this happen?? Any thoughts?? Anyone else notice a vaccum in their tank as they use fuel??
TIA
Rick
|