This $25 tool can tell you so much about your cars problem

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What if it's diesel they don't create vacuum and use pumps to actuate auxiliary parts and vacuum does not play into drivability ..hmmm lol ... great video and very true cheers

SaerTurner-wnqh
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How do you know what vacuum pressure the engine should be pulling? Since i assume this both varies by vehicle and elevation.

Assume tip, I just don't understand how to utilize it

uknowngamer
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I bet it clogged it because it burns oil

arielatom
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Just hollow it out. If you dont have emissions inspection where you live, you just need the shell so they "see" you have one

burpostockings
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Shouldn't you have hooked it up to the exhaust manifold?

petescustomcarshop
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How does a clogged exhaust substrate (cat) lower the vacuum produced by the engine?

itwised