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04-13-2018, 04:08 PM
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Member
Join Date: Feb 2017
Drives: silver brz 2013 lmtd
Location: East Bay Area, CA
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Vacuum Pump?
After installing headers, I realized that there was a hissing/ticking sound coming from my engine. I thought it was an exhaust leak, so I felt for air coming out of all components with a piece of paper with no luck.
However, I think it may be the vacuum pump and I just did not notice the sound prior because I wasn't actively listening for it? 1) coming from right backside of engine 2) when I press brakes 1 time its okay, but on second it locks up and becomes really firm 3) when I press brakes repeatedly, my STFT rises dramatically to ~ +15. when i stop, it goes back down to within plus or minus 3. 4) My LTFT is at +5% cold start, +7% idle. I'm not getting any CEL codes... This is an automatic, so I'm assuming its the vacuum pump? Thoughts? |
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