Question about 2006 Ford Ranger

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Hi there, car started 2 months back with absolutely no power. 100% till 3ooo rpm. ford diagnosed the catalytic converter was blocked. converter was removed but had low down rpm misfire. replaced all 6 plugs and fine for a month. now it has no power, misfires under load and is very heavy on fuel.

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Right there is your problem is converter was removed not replaced u cant remove converter on cars no a days be cause the have oxgen sensor before and after the converter when u take out the convertor the post oxgen sensor will always read rich so computer than trys to adjust timing air/fuel ratio etc . and gets stuck in never ending loop

Posted on Jun 02, 2010

  • adrian botes Jun 02, 2010

    Ok then, your'e probably right. But why then after the converter was removed she had a miss only up till 3ooo rpm and had plenty power in the upper range, but after the plugs were changed the car was fine for a month. plenty power and no miss. all of a sudden this problem is there and if i drive slowly she is fine but only under load or hard acceleration she misses?

  • paul pettit Jun 03, 2010

    could be other problems too cant tell u for sure without seeing it myself but my best guess is with o2 sensor not reading right computer going to change air fuel ratio and timing which isnt needed which is causeing plugs to foul out



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