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Re: What to do with the Secondary Air Injection system (ACU engine)

 

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Hi Radek,
As far as I know, the secondary air injection system only operates for the first 60 or 90 seconds of a cold start. It pumps air into the exhaust flow to help the catalytic converter convert all the unburned fuel. As long as the system isn¡¯t the source of exhaust or intake leaks, the van should run fine without it. See this samba thread for more info:?


Thank you,
Quinn

On Sep 15, 2024, at 8:44?PM, Radek <radek.radarski@...> wrote:

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Hello,
?
I'm troubleshooting a 1995 Rialta with ACU engine for a friend who just bought it.? There were monkeys in the engine bay: loose wires, disconnected vacuum hoses, SAI check valve cut out, radiator blower fans bypassed with a switch - a real mess.
In comparison to my old AAB, this engine has some extra complications, like the SAI system.? My question is this:? should I try to reconnect and repair the SAI, or should I rather do away with it.? Has anyone successfully removed that system? Will the engine run correctly without it?
Thanks for any suggestions,
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Radek
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