Quick vacuum confirmation - 986 Forum - The Community for Porsche Boxster & Cayman Owners

geraintthomas · 06-02-2018, 01:37 PM

If I have a vacuum leak somewhere (for instance, a cracked oil filler pipe), the SAI's check valve won't open at all as it's run on vacuum, causing the SAI pump to be blocked.

Correct?

particlewave · 06-02-2018, 05:10 PM

Depends on the severity of the leak, but the short answer is yes, it will keep it from opening.

geraintthomas · 06-03-2018, 12:17 AM

Severe enough to have a substantial performance impact on the car, and to throw lean EML's? I thought I had two issues, a vacuum leak and the SAI issue, but I think it's just one big vacuum leak.

BYprodriver · 06-03-2018, 02:10 PM

Quote:

Originally Posted by geraintthomas

Severe enough to have a substantial performance impact on the car, and to throw lean EML's? I thought I had two issues, a vacuum leak and the SAI issue, but I think it's just one big vacuum leak.

Vacuum leaks suck

TrumpyAl · 06-05-2018, 03:58 AM

Ummm. Sorry to be a pain, but what does SAI stand for?

geraintthomas · 06-05-2018, 03:59 AM

Secondary Air Injection (pump)

Jamesp · 06-06-2018, 04:20 AM

Vacuum leak is on the check list for SAI codes.