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RarlyL8 RarlyL8 is offline
Crotchety Old Bastard
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Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,527
As Dave stated the idle mixture screw should be adjusted only after the fuel pressure has been verified as in spec. I assume sense you are having no cold start issues that your cold presure is in spec.
The idle mixture screw only adjusts the CO at idle when the engine is fully warm. Sense you are seeing an oscillating idle when warm it is logical that this might be the issue.

Once you get a feel for how all this works and some CO and fuel presure data gathering experience you can adjust the idle mixture by ear. On my engine I turn it rich until it begins to oscillate and then back it off a tick. That gets me real close to 3% CO. All engine are a little different, you will find where that "sweet spot" is in yours as well.
RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 07-05-2007, 08:56 AM
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