Ian W 
Member 
 
Registered: 8th Nov 03
 Location: Wirral, Merseyside 
User status: Offline 
 
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What does this thing do?  
 
 
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Ian 
Site Administrator
 
Registered: 28th Aug 99
 Location: Liverpool 
User status: Offline 
 
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Secondary air injection, supplies air to the exhaust manifold to provide oxygen to burn any hydrocarbons still in the exhaust. 
 
Hence why it'll pop like fuck on a cold morning. 
 
Not my vid but the Corsas are the same idea - https://www.youtube.com/watch?v=t9Ht6MrZnrg 
 
Once you hear the fan run give it a rev and you'll normally get some pops. 
 
[Edited on 10-12-2016 by Ian]
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Ian W 
Member 
 
Registered: 8th Nov 03
 Location: Wirral, Merseyside 
User status: Offline 
 
 | 
 
quote: Originally posted by Ian 
Secondary air injection, supplies air to the exhaust manifold to provide oxygen to burn any hydrocarbons still in the exhaust. 
 
Hence why it'll pop like fuck on a cold morning. 
 
Not my vid but the Corsas are the same idea - https://www.youtube.com/watch?v=t9Ht6MrZnrg 
 
Once you hear the fan run give it a rev and you'll normally get some pops. 
 
[Edited on 10-12-2016 by Ian] 
   
 
Cheers  
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