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Old 09-17-2003, 02:11 PM
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Join Date: Jun 2002
Posts: 45
190e Should fuel pressure regulator hold vacuum?

'91 190e 2.6--

Should the vacuum port on the fuel pressure regulator hold vacuum if testing with a MightyVac? As of now, mine doesn't. There isn't any fuel leaking out of the vacuum line but it does smell and "taste" like fuel.

Also, what does the EHA do and how do I test it? I have a small bit of fuel pooled on the back side of it near a tiny hole between the two mounting screw heads.

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Old 09-17-2003, 04:06 PM
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Join Date: Jul 2001
Location: SoCal
Posts: 1,303
"Should the vacuum port on the fuel pressure regulator hold vacuum if testing with a MightyVac?"

I don't know - but it is more a 'vent' port than a vacuum connection. It connects to the breather tube, and as such is not a component in the manifold vacuum array. I.e., it will not cause any mixture metering error. My guess is that your test produced normal results.

'91 MB 190E 2.3
'08 RAV4 Ltd 3.5
'83 Lazy Daze m'home 5.7
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