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#1
08-29-2010, 08:57 PM
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M117 High Idle Diagnostics Thread
Hey everyone,
I know some of you have been through this before... A friend of mine has a MY90 560SEL, it has a few problems, one of which is a high idle. He just had it up at my indy's shop for a new chain/guides/ball joints They also replaced engine rubber and tried to figure out what was causing the high idle..I also looked into this myself prior to the car going up to the shop and thought it was vacuum issue... WHAT IT DOES The engine will start out with an idle of around 700-800 when started cold. Then as the engine warms up the idle will begin to sit around 1500. If you shut it off, and let it sit for a few minutes, it'll restart at a lower idle..but after a few minutes it'll sit at 1500. I swapped out IACV, Idle Control Computer with the ones from my 420SEL (no idle problems) and there was no change in the engine's idle. I'm open to any ideas/comments/suggestions/hints/tips/thoughts you guys are willing to provide. Thanks Kris
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Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k 
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