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Old 02-25-2007, 09:15 PM
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Join Date: Apr 2006
Location: Ohio
Posts: 94
Idle speed on '87 300e

Hi folks,

I'm finally getting over the hump on the repairs to our "New" 300e. I don't think anyone would be real interested in what it has taken to save this car but let's just say I've sunk way more into this car than it's worth. I'm just a sucker for solid old cars.

The idle speed seems a little low on the car, about 600 rpm. This has 2 results; 1) The alternator does not put out enough voltage at that rpm so my rear defroster kicks off. 2) More importantly, it would seem that my transmission does not produce enough hydraulic pressure at that rpm to hold the clutches tight so when I step on the gas (and the clutches engage) I get a not so smooth start.

I just replaced: Cam, rockers, valve guide seals, O2 sensor, ALL vacuum hoses firewall forward, Idle air valve hoses, distributor cap, rotor, plug wires, plugs, air filter ...

I looked in my factory CD manual for an idle speed adjustment for the 103 engine but I found nothing, which I assume means the idle speed should not be adjusted. Anyone have any suggestions?

Thanks in advance,
Bob Kopicki
Massillon OH
'67 TR-4a
'76 GMC C-15
'85 XJ-6
'87 300e
'97 VW Cabrio
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