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thstone · 02-14-2015, 06:26 AM

The secondary air pump will turn on under two situations: (1) At cold start to reduce emissions, and (2) to test the pressurization integrity of the SAI and fuel system.

The pressurization test usually happens the first time that the car is at idle as the engine warms up. However, this test can be delayed substantially if the car never has an opportunity to idle. For example, the car is started and driven directly onto the highway without any stoplights, this will delay the pressurization test until there is an opportunity to idle.

What CEL code is being stored? Please read it out and post it. Your car might be failing the pressurization integrity test.

02-14-2015, 06:26 AM	#4
thstone Certified Boxster Addict Join Date: Nov 2010 Location: Los Angeles Posts: 7,669	The secondary air pump will turn on under two situations: (1) At cold start to reduce emissions, and (2) to test the pressurization integrity of the SAI and fuel system. The pressurization test usually happens the first time that the car is at idle as the engine warms up. However, this test can be delayed substantially if the car never has an opportunity to idle. For example, the car is started and driven directly onto the highway without any stoplights, this will delay the pressurization test until there is an opportunity to idle. What CEL code is being stored? Please read it out and post it. Your car might be failing the pressurization integrity test. __________________ 1999 996 C2 - sold - bought back - sold for more 1997 Spec Boxster BSR #254 1979 911 SC POC Licensed DE/TT Instructor Last edited by thstone; 02-14-2015 at 06:29 AM.