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!
I have a 2004 Kia Amanti with codes PO171 and PO175 >
I have smoke the car for vac leaks none . I have cleaned the MAF sensor . Long and short term fuel trims are high rev car up remained high no vacuum problem. I have not checked my fuel pressures as yet waiting on the fuel rail adapter to come from Tilman tools in CA. I disconnected the MAF and the idle smoothed out plug it back and rough again. I have plenty of power in car just idle rough and shakes at idle not at high speed. I am going to disconnect O2 sensor bank 1 sensor 1 and the same for bank 2 sensor 1 and check sensors..I have no vacuum leaks I even disconnected the brake booster to check that for vacuum leak. I have checked the operation of purge valve it is holding vacuum and letting go of it on signal. Can anyone help me out as to where I should look next. CptT
So, lean on one side, rich on the other, you could swap 02 sensors side to side, do codes follow or stay?or is there a exhaust leak on bank 1?that would keep it lean, 171 or watch sensor 2's and see which one agrees with sensor 1
