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Old 09-04-2012, 11:11   #1
Steve220
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Vacuum lines

Quick question and need a rather sharp-ish answer:

Can you T into the vac line that runs from the manifold to the fuel pressure regulator? I'm just finishing off the install for the new boost controller and its either T off a line thats 4" away or 2ft away.

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Old 09-04-2012, 11:57   #2
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You can but id not advise going into that one, id use a bov vacuum personally
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Old 09-04-2012, 12:39   #3
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The problem is the BOV line is -6 and on the other side of the bay. Ever manual i've ever seen says plumb it in there, but the only reason i see not to is that its not a 100% clean line to the FPR, but i've been out for a spin with the line T'd there and the fuel pressure is still spot on and the unit is working fine. Is there a proper full on fact reason why it shouldn't be there?
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Old 09-04-2012, 12:44   #4
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No reason not to that I can think of. Do they not both trace back to the same pipe/joiner in the end anyway?
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Old 09-04-2012, 16:12   #5
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As above, there isnt a fully fleged reason for not connecting to that line other than keeping it a clean line. As long as your confident its a secure connection then it shoukd be ok
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Old 09-04-2012, 16:14   #6
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Oh its secure
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Old 09-04-2012, 16:16   #7
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I personally would not T-off the fuel pressure reg vac
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Old 09-04-2012, 16:20   #8
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Oh its secure
Should be ok, come to think of it i used to have to install bov's on vauxhalls z20let/ler engines using fuel reg pressure vac line but cant remember why. Was never a fan of doing it tho
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Old 09-04-2012, 21:40   #9
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i wouldnt do it either, reason being is the more joins you have in the FPR vac line the more chance it has of coming off, if it comes off and you dont know about it your fuel pressure will drop and end up running lean
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