Hi I have a 2000 ford expedition 4.6 2wd . It keeps bogging down when I come to a stop light or when I slow down and try to accelerate again. But it only does this under a quarter tank of gas when I fill her up she runs fine.I've replaced the fuel pump,air filter,fuel filter,cleaned the maf sensor,changed the plugs ,cats were clogged so I also changed those . Check engine light is on and its showing an o2 sensor reading lean and low voltage. Please help

Asked by Mar 11, 2013 at 04:38 PM

Question type: Maintenance & Repair

3 Answers

27,245

if its reading lean check for vacuum leaks. does it have lean codes for both banks or just 1?

Only 1 bank 1

27,245

It may just be a bad 02 sensor in that case.

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