Thread: How to adjust idle speed on '87 300D?
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Old 03-07-2008, 02:18 PM
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Diesel Dan Diesel Dan is offline
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Quote:
Originally Posted by babymog View Post
There is a round plug just inboard of the fusebox under the hood, looks like a knob with numbers on it. Unplug it and index it up one number.

Does the tachometer work?
The tachometer has been intermittantly not working. This will occur upon startup and lasts for a couple minutes. I will start the car, and the idle will be extraordinarily low, with the tachometer not responding at all. At some point there will be a slight surge in the idle, with a corresponding reaction of the tachometer, and then the engine returns to normal idle, and the tachometer is working again.

Anyone have ideas of what is going on here?
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1987 Mercedes 300D ~200K (Greasecar & Biodiesel)
1993 Ford F-250 7.3 IDI diesel 165K (Biodiesel)
1996 Thomas/International Bus with DT466 engine
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