Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
vehicle is 2000 ford explorer 4.0 sohc.
Guys i keep getting a lean code po171 on my explorer. The fuel trim levels are between 17-19 but on both banks. The short term change but stay between -10 to + 10. I have changed plug and wires. Checked for vacuum leaks. The upper intake gaskets were replaced 6 months ago and fuel filter. Lower intake hasnt been replaced. I just dont know where to go from here any help is appreciated.
An air intake leak anywhere between the MAF and the engine could be the sources of your trouble or a bad/dirty MAF. One other thing that can cause similar issues are any changes to the air intake. MAF's are carefully calibrated to the intake drsign any changes such as removing the mesh screen or fitting a cold air intake can cause a lean condition
" We're trying to plug a hole in the universe, what are you doing ?. "
(Walter Bishop Fringe TV show)
Topic Author
