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This is not uncommon. As the air metering devices age they become sluggish and sticky. Most often it is the AAR that stays open during a short drive. To test this you can disable the unit or use a pair of large plyers and pinch the hose when it is acting up. If disabling the unit you have to plug both inlet and outlet hose then use your right foot to increase the idle RPM until the engine warms. If the AAR passes then move to the AAV.
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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
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