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Most likely the SAI pump that makes noise. Posted by SWEDECAR [Email] ![]() ![]() ![]() In Reply to: Rattling noise from a motor/pump near drivers headlamp, simon_saab900s_coupe, Fri, 2 Jul 2004 02:00:50 Members do not see ads below this line. - Help Keep This Site Online - Signup |
SAI (Secondary Air Injection) is a system that pumps fresh air into the exhaust stream before the catalytic converter to "light up" the cat quicker and reduce emissions.
The pump is very noise even when everything is correct and it runs for about 2-3 minutes.
It might be that the pump have come loose from its mounting bracket (saw that yesterday).
It's also a plastic valve under left head light connected to that SAI system that goes bad.
Anders
posted by 67.113.87...
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