What causes a rough idle for a minute or less when you start the car? My mechanic replaced the spark plugs, spark plug wires and one coil pack. This did not help. My mechanic cleaned the injectors and this did not fix it. The check engine light has come on three different times when it idles rough long enough. My 1999 Buick Century has 98,000 miles.
Rough Idle when I start the car on 1999 Buick Century
by gerald.h in Greensburg, IN on October 21, 2010
ANSWER by mastertech6371 on October 21, 2010
sounds like a leaking injector that puts fuel in the cylinder and has to burn it out when you start to clear it out. have him check the fuel pressure running and off to see if it bleeds down overnight. Roy
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