2nd Generation Specific 1986-1992 Discussion

Intake Leak

Old 02-27-2004, 08:47 PM
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My friend's new engine has idleing problems. We had gutted the emissions and checked EVERYTHING, with no change in idle. It makes a hissing noise at low rpms, if you adjust the throttle to let it run at 1500 you can hear a hissing. The only place we can figure it is coming from is the Intake itself. We took the Dynamic chamber off to paint it. I heard that if you put that black plate on backwards than it wont idle. But is there a gasket in there? We didn't seal that, should we? also if you push the throttle at the upper right thing just a little than the leak stops hissing, could this be our mysterious leak?? I have a pic if that doesn't make sense. Thanks,

John
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Old 02-27-2004, 11:38 PM
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Help? Ideas?
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Old 02-27-2004, 11:42 PM
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spray starter fluid on every mating surface you took apart and look for surging idle. then tighten up anything that needs to.
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Old 02-27-2004, 11:44 PM
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Think I can just tighten the hell out of those bolts and that will fix it without having to take it off and gasket seal it?
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Old 02-27-2004, 11:49 PM
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don't break the bolts/nuts. you shouldn't have to tighten them super hard. did you clean all of old gasket off before putting on a new one? like absolutely clean? check vacuum tubes too.
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Old 02-27-2004, 11:52 PM
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There are only 3 vaccum hoses, oil injectors, LIM, FPR. No we didn't clean the old gasket.
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Old 02-28-2004, 12:31 AM
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your always suppose to replace the gasket when you take something apart, thats where your leak is.
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Old 02-28-2004, 12:55 AM
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Originally Posted by g_dripht-alex' date='Feb 28 2004, 01:31 AM
your always suppose to replace the gasket when you take something apart, thats where your leak is.
Not necessarily, I have done it before without problems..



The real question is did you put new gaskets on without getting rid of ALL of the old gaskets...
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Old 04-19-2005, 02:28 PM
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sometimes the gaskets are in good shape, you should always clean the surfaces that they mate with and some kind of gasket sealer is a good idea on both sides of the gasket.
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Old 04-20-2005, 11:18 PM
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[quote name='g_dripht-alex' date='Feb 28 2004, 02:31 AM']your always suppose to replace the gasket when you take something apart, thats where your leak is.

[snapback]471951[/snapback]

[/quote]



yea hes right.. its smart idea to replace
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