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Pulsing Idle... Sometimes accompanied by "Service engine soon" light. it s about 100 RPM pulse. Then it will smooth out and then it will start again. O2 Sensor or some other Sensor , or Fuel Filter...Its been a good long while since I ve changed that. Runs fine other than the Idle Bug..


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Location: Oregon
you should have the engine scanned for memory codes. Hopefully the computer will save the check engine light code and you can see what the computer thinks is going on with your engine. wrong fuel pressure, vacuum leak, things that the computer is trying to compensate for.


   
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