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#1
11-06-2006, 03:29 PM
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Rough Cold Idle on a 99 SLS
Just bought a 99 SLS. Runs beautiful but on a cold start, it idles kinda rough for about 45 seconds, then runs very smooth. Any ideas what it may be, a tune up or bad sensor?
 Hopefully something small. Please help
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Big Dan58 Panic, Chaos and Confusion... My work here is done! 
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#2
11-06-2006, 06:03 PM
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Re: Rough Cold Idle on a 99 SLS
It could be fouled plugs. You didn't say how many miles were on it.
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2000 Cadillac STS 2005 Cadillac Escalade 2008 Triumph Sprint ST 1050 ABS
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#3
11-07-2006, 06:37 PM
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Re: Rough Cold Idle on a 99 SLS
I found out that has new plugs, wires and new coil packs.
It has 86000 miles
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Big Dan58 Panic, Chaos and Confusion... My work here is done!
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#4
12-26-2006, 09:10 PM
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Re: Rough Cold Idle on a 99 SLS
I had the same issue (68,000 miles) and mine was due to a cracked spark plug. The ceramic head on two of them were cracked. I changed the plugs and wires and all was well.
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