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Old 11-08-2008, 07:18 PM   #2 (permalink)
The Atomic Ass
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Join Date: Oct 2008
Location: Mason, OH
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Priinocchio - '17 Toyota Prius Two Eco
90 day: 65.45 mpg (US)
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Originally Posted by holypaulie View Post
Today I hook up my vacuum gauge and reading is not steady. It's fluctuating between 20"-22" at the idle and even more during acceleration. I can't read when needle is jumping like that. What could be wrong? Any help would be appreciated.
You've got a 4cyl engine right? It's going to do that. Use larger air line or install a small reservoir between the gauge and TB.

You might find though, that it smooths out at high-rpm.
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