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Old 07-21-2001, 09:12 PM
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Hi folks.. Been a while since I've been on, but finally got my 77 450SL up, running, and registered.

2 Questions:

1. I seem to be having problems getting the idle speed right. Worse yet the book I have does not describe adjusting idle speed very well. Right now I have the idle speed at 700 in gear, but when it's in park it shoots up to 1500 - 2000. That doesn't seem quite right. Any ideas? I'm not sure I'm adjusting the right thing.

2. Does any one know of a good place for replacement interior parts? Now that it's running I'm up to fixing her up

Thanks! Can't wait to go farther then the local store ...heheh
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Old 07-21-2001, 10:14 PM
MB Medic
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The idle adjustment screw is located just in front of the air cleaner, slightly off from center to the driver's side of the car. It's a screw that uses a flat blade srewdriver, probably 3/4" in diameter. Clockwise slows the engine down and visa-versa. That engine should idle 800rpm out of gear, 550-600 in gear. That engine has an additional air valve (located next to the idle screw) that is used for fast idle when the engine is cold. You may have a stuck additional air valve.
Congrats! on getting "her" up and running.
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Old 07-22-2001, 07:54 PM
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Well At least I had the right adjustment. I'll check the air valve and see if I can't get adjusted right.

Only have to fix a small exaust leak and then see if I can't get it to pass the CA Smog inspection.

Not bad since I got the car for the price of a new engine and transmission (which I got really cheap from a guy that rolled his)!

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