1991 Mercedes Benz 500sl high idle

1991 MERCEDES BENZ 500SL
47,000 MILES • 5.0L • V8 • 2WD • AUTOMATIC
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TLEEK
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  • 1 POST
when i try to start vehicle i have to turn key half way turn airconditoner off because it comes on by itself once i turn air conditioner to off i then can start car once started it goes to 2000 rpms in park i turn air on it drops to 1500 rpms when i put it into drive it drops to 700 rpms after 5 minutes of idling my temp gauge reads 90 celcius i just changed idle air control valve but no help
Mar 4, 2015 at 4:38 PM
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DR LOOT
  • CAR REPAIR CONTRIBUTOR
  • 2,311 POSTS
if that is the Mercedes mechanical injection you got problems, other than that I would check for a vacuum leak pull the air cleaner off make sure all the vacuum lines are in good condition and connected
Mar 4, 2015 at 9:17 PM
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