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Jeep Wrangler YJ
YJ General Discussion
Crankcase Fresh Air Inlet CCV
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<blockquote data-quote="Gilaguy23" data-source="post: 437353" data-attributes="member: 19498"><p>If im following you correctly the lack of gasket on the rear air tube from the VC to the air cleaner will not make a high idle or a vacuum leak. Yes, there was a 1/8 or so thick round rubber gasket there, or should be. Its the other end where the small line coming off the TB or intake manifold to V/C could cause a vacuum leak if unhooked or one of the 30 year old rubber 90'ies cracked. I'm guessing when you cleaned the TB some of the crap you knocked loose is now stuck in the port or on the pintle of the IAC thus the high idle. </p><p> BTW, the brass orifice screwed into the front of the VC is basically a PCV breather. It will in time carbon up and could use the occasional clearing. I clear my 91's out fairly often while doing the service. That hole is very small so DO NOT drill it out,just use a small wire or something like that to clear it.</p></blockquote><p></p>
[QUOTE="Gilaguy23, post: 437353, member: 19498"] If im following you correctly the lack of gasket on the rear air tube from the VC to the air cleaner will not make a high idle or a vacuum leak. Yes, there was a 1/8 or so thick round rubber gasket there, or should be. Its the other end where the small line coming off the TB or intake manifold to V/C could cause a vacuum leak if unhooked or one of the 30 year old rubber 90'ies cracked. I'm guessing when you cleaned the TB some of the crap you knocked loose is now stuck in the port or on the pintle of the IAC thus the high idle. BTW, the brass orifice screwed into the front of the VC is basically a PCV breather. It will in time carbon up and could use the occasional clearing. I clear my 91's out fairly often while doing the service. That hole is very small so DO NOT drill it out,just use a small wire or something like that to clear it. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Crankcase Fresh Air Inlet CCV
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