View Single Post
RarlyL8 RarlyL8 is offline
Crotchety Old Bastard
RarlyL8's Avatar
Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,527
It's likely the Auxilliary Air Regulator.
They are activated by both electricity and engine heat. With age the bimetal strip begins to deteriorate in function and may be slow to react.
When you re-start your car with a warm engine you can have a condition where the engine oil is hot but the top of the engine is cold (more so on a cold day). The hot oil allows the engine to run more freely which exaggerates the high idle from the partially open AAR.
The cure? Yank out the AAR and toss it in the dumpster. You can perform the same function with your right foot.
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 11-14-2007, 05:18 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)