Secondary Air Valves & EVR (which has nothing to do with secondary air, but is a solenoid vacuum valve similar to the Thermactor Air Bypass & Thermactor Air Diverter, and is usually mounted beside them)
TAB & TAD solenoids should read 50-100 Ohms; each should hold vacuum applied to the source (farthest) nipple until 12V is applied across the solenoid terminals, at which point it should vent to the other nipple.
See also:
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![secondaryairvalves.jpg Secondary Air Valves & EVR (which has nothing to do with secondary air, but is a solenoid vacuum valve similar to the Thermactor Air Bypass & Thermactor Air Diverter, and is usually mounted beside them)
TAB & TAD solenoids should read 50-100 Ohms; each should hold vacuum applied to the source (farthest) nipple until 12V is applied across the solenoid terminals, at which point it should vent to the other nipple.
See also:
[url=https://www.supermotors.net/registry/media/858380][img]https://www.supermotors.net/getfile/858380/thumbnail/veci.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/173786][img]https://www.supermotors.net/getfile/173786/thumbnail/evrtest.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/589993][img]https://www.supermotors.net/getfile/589993/thumbnail/secondaryair.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/894687][img]https://www.supermotors.net/getfile/894687/thumbnail/vaclinesefi.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/826382][img]https://www.supermotors.net/getfile/826382/thumbnail/egrtubesv8.jpg[/img][/url]](https://www.supermotors.net/getfile/1167873/fullsize/secondaryairvalves.jpg)