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2000 Lesabre idling very rough on 2nd start

Old Oct 4, 2024 | 06:07 AM
  #1  
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Default 2000 Lesabre idling very rough on 2nd start

First start of the day is normal. When going out to run errands then restarting after a stop, from only a few minutes to a few hours, the car starts fine then idles very rough. Drives fine and resumes normal idle. No smell of fumes, no excessive tailpipe emissions and, no engine light warning or other unusual indications.

I added a can of Seafoam cleaner to the fuel. No improvement. Also last 4 tanks of gas have been mid-grade level.

The car has 69,000 miles and has been regularly maintained. I did inherit it so know it wasn’t driven a lot in the last few years.

Any of you had a similar problem?

 

Last edited by RA100624; Oct 4, 2024 at 06:09 AM.
Old Oct 11, 2024 | 09:45 AM
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Old Oct 14, 2024 | 08:56 AM
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Old Oct 20, 2024 | 05:52 AM
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Old Oct 20, 2024 | 11:16 AM
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If the EGR valve is full of carbon , it can stick open and produce a rough idle.

I realize this was an old post, but you never know !
 
Old Oct 28, 2024 | 08:58 AM
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Old Nov 4, 2024 | 05:20 PM
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Old Nov 8, 2024 | 02:10 AM
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Old Nov 8, 2024 | 02:10 AM
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Old Nov 8, 2024 | 02:11 AM
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