in-hg vacuum at idle
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Professional
Joined: Jul 2005
Posts: 163
Likes: 4
From: Lincoln, NE
in-hg vacuum at idle
Can someone tell me what there vacuum is at idle. Mine is around 17in-hg vacuum.
2004 Dodge dakota 4.7L engine.
I think my plenum gaskets are bad sucking in warm air causing idle issues.
Replaced map sensor tps fuel injectors ignition coils all 8
I have an electric vacuum gauge hooked up just after the throttle body and it says 17hg vacuum seems a little low right??
2004 Dodge dakota 4.7L engine.
I think my plenum gaskets are bad sucking in warm air causing idle issues.
Replaced map sensor tps fuel injectors ignition coils all 8
I have an electric vacuum gauge hooked up just after the throttle body and it says 17hg vacuum seems a little low right??
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Joined: Dec 2010
Posts: 4,858
Likes: 47
From: MA
17" is about low normal. What port you're measuring it from can change the reading some too. Try tapping into the brake booster line.
16-22" is pretty much normal. It should be nice and steady.
If you live at a high altitude the reading can change some (lower).
16-22" is pretty much normal. It should be nice and steady.
If you live at a high altitude the reading can change some (lower).