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recently i changed the front o2 sensor on my 01 ex. Ever since then, when i start up my engine the car starts great, but soon after it begins to vibrate almost as if the engine wants to die. this usually lasts about ten seconds after i start up my car, and then it goes away, and only happens after initial start up. I just want to know what might be the problem. thanks guys

 
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what brand of sensor did you get ??? try using some injector cleaner like Lucas and see if that helps. also try cleaning out your IAC valve.

 
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I got a Bosh replacement sensor. Ill try to clean the valves you told me about, and get back to you with an update, thanks

 
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never ever use Bosh oxygen sensors in a honda only use DENSO or NTK.

 
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Thanks man I'll keep that in mind