12-16-2007, 05:03 PM
I had the fuel pump replaced from the gas tank since the fuel was not being pumped to the engine. Before this the ranger was on average about 20 mpg. After the fuel pump got replaced back in the tank after i took it out of a ranger about one year older the gas milage went bad. they look to be the same fuel pump. the first 10 gallons i was around 13.32 mpg on average. the next 10 gallons i was around 7.35 mpg. then i put in one gallon and went on the highway a short distance then exited and only got 2.5 mpg. I replaced the mass air flow sensor a while back and i was told by one guy that if you replace the mass air flow sensor once, you do not have to replace it again,and another guy told me that if you change a fuel pump you have a 50/50 chance of the mass air flow sensor needing to be replaced. Which of this is true, if any? I think the codes need to be reset. I was told, if you take the battery cable off and put the ignition switch in the accesory position for a length of time, this will reset the codes. Is this true? If it is true, which cable do you remove and which do you do first , remove the cable or put the ignition switch in the accesory position and for how long do i leave it like that? where can i get a free engine scan loaner or free engine scan besides aamco, since mine is to old for advanced auto parts, napa, auto zone and pep boys? since it was good before the fuel pump stoped puming fuel it looks loke all the parts should be good and the codes need to be reset , but i am not sure.It is a four cylinder ,the one that has only one fuel pump in the gas tank, far as i know, 8 spark plug wires, fuel injected,with close to 100,000 or 200,000 or 300,000 miles on it. do you think the guy put the fuel pump in right? what can i do?