Just a heads up: I've generally been recommended against using fuel injector cleaner that you just dump into your gas tank; apparently they don't do good things for our O-rings and such, whereas big american cars don't have such delicate/high-tech parts. <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt='
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Also, consider changing your air filter... that's all I can think of unless someone pulled timing back on the car... <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/thumbs-up.gif" border="0" valign="absmiddle" alt=':thumbsup:'> Good luck!
(and yes, a better description of how the car's running "badly" would help!<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt='
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