Posted by Bryan on March 03, 04 at 05:11:35:
Which O2 sensors will have the most effect on fuel economy ?? I think it is the pre cat ones,But am not sure. I have a lot of miles on the truck and They all need to be replaced, But I can't do them all at once. I just put a new fuel pump in last night and that was $324.00, OUCH !! It wasn't bad to put in other than the fuel line connections, I couldn't get the little tool to work so I cut the lines on the old pump and left the stubs in the fuel line. I then found a 1/4" drive shallow socket of the right size and pushed it in the end of the line. After doing that I threaded a screw in the end of the fuel line and bingo it popped right out.