Rough Idle on my 99 Seville

Gymgui

New LVC Member
Joined
Jan 8, 2010
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Location
Wilmington, Delaware
Hi all! I have a 99 Seville SLS. 83,000 miles and when I start the car, it idles rough. Sometimes it idles fine when I first start it, but more times than not, it idles rough. When I hit the gas pedal, it will smooth out and runs fine.
I just had a tune-up but it still idles rough.. Any ideas what could possibly be the culprit?
It does not smoke or steam from the exhaust at all, like I said, sometimes it idles perfect when I first start it. It always starts right up, never continuous cranking needed
 

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