I had a LP go out over for 2 days last week before I noticed it. Threw a p2016 which means new vp44 which was replaced 1700 miles ago. Question is, we just switched to blended fuel here up north, would my mileage go from 19 to 10????? They said my pump was fine, but this is my 2nd tank since the p2016 and both times 10mpg?? Should I make them warranty my pump again or is it just the fuel? I have a ISSPRO mechanical fuel gauge, reads 7psi @ idle with a brand new carter relocated pump, but when I tested with a pressure gauge it was @ 11psi with that gauge?

 

Sounds like the pump. I'm no expert, but I don't think that fuel would cause that big change. Warranty.

 

Get a new pump, you really want your idle pressure to be around 16-18 psi, and anything lower than 12 will burn up you VP. I would really look into your lift pump and see if there is a way to increase the pressure on it.