I meant to post here this summer after I had to search the forums to find the cause of my truck cutting out in traffic. I had the fuel pump replaced earlier and the mechanic didn't think that was the problem. Long story short he was wrong. I searched the forum and found that the ethanol fuel was probably killing the pumps. That is what it turned out to be. Not sure what the damage was to the pump but I haven't had a problem since. Thank you F-150 on line.

 

Ethanol gets a bad reputation, it's not caustic or corrosive.

It's more so that the fuel was created after the truck was built, and it doesn't have sensors to detect the fuel, and therefore can't correctly optimize/burn the fuel

 

What do you think is the cause of the fuel pump failure? I know I have to use fuel injection hose on my 66 Novas because of the fuel. I based my post on what I found on a thread here. Thanks for the comeback.

 

Fuel pumps can fail at any time. Normally they last a long time but there is no guarantee that they will. I doubt the 10% ethanol in the fuel had anything to do with the pump failing.

 

Generally speaking fuel pumps are designed to be fully submerged in fuel, helps to dissipate heat. When people habitually run on 1/4 tank of gas they can overheat and shorten the life span.

I'm not saying you run yours to E all the time, just discussing what I see as typical driver behavior

As well as ignoring fuel filter. They restrict flow as they clog with debris, also making the pump work harder to deliver full pressure

 

The original pump lasted 13 or 14 years. The second lasted less than 2 years. The third lasted less than a year. I'm thinking the replacement pumps were a piece of crap. The temp. here reaches over a hundred and twenty degrees in the summer and the original didn't fail. Too bad I didn't keep the last pump to see what went wrong. I have the truck checked out every year because I don't want to break down in the middle of nowhere or on the Rez. I think the fuel filter Is changed then but I will make sure from now on. You came up with some good info. Thanks.

 

I've heard of longevity issues with aftermarket fuel pumps - there are a few good ones but a lot of bad ones. In spite of the fact they are really expensive, I think I'd pop for a Motorcraft if I ever need to replace mine.