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1991 Mercedes Benz 500sl high idle

Tiny
TLEEK
  • MEMBER
  • 1991 MERCEDES BENZ 500SL
  • 5.0L
  • V8
  • 2WD
  • AUTOMATIC
  • 47,000 MILES
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
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Wednesday, March 4th, 2015 AT 4:38 PM

1 Reply

Tiny
DR LOOT
  • MECHANIC
  • 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
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Wednesday, March 4th, 2015 AT 9:17 PM

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