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07-16-2007, 09:53 PM
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3800 Member
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mike sesto
Location: connecticut
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Posts: 60
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montecarlossfan holds the following arcade championships:
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excessive crankcase vaccum
I just swapped in an l26 into an 00 monte ss..i used an adapter plate etc...my question is why is there so much vaccum in the crankcase like if i open the oil fill it has a strong rush of air that goes in. is something blocked off that i need or , do i need to install a breather on the valve cover?
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07-16-2007, 10:04 PM
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3800 Guru
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Billy Meek
Bermuda Blue 05 GTP Comp G
Location: Keaau, Hawaii
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fastech holds the following arcade championships:
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There shouldnt be that much vacuum. This is typically due to an intake gasket vacuum leak or something wrong in the PCV system.
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3.4, Wizaired, 3" DP w/magnaflow cat, no res., 42.5's, 180 deg., altered 104's, HPT, Toyo T1R's, Beltronics RX65 radar detector (has saved my tail many times).
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07-16-2007, 10:07 PM
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3800 Member
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mike sesto
Location: connecticut
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montecarlossfan holds the following arcade championships:
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would the adapter plate to adapt to the older style tb block off a pcv passage?
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07-16-2007, 11:02 PM
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3800 Master
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Marshall Edwards
Location: Atlanta
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91parkave holds the following arcade championships:
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i had that problem to with the adapter what i did was tapped a fitting on the UIM where PCV passage goes and installed a breather filter on it, no problems to speak of after words
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91' Parkave, Headers,S2TB,Ported S1 UIM,LIM, Shift kit, 85mm MAF.........The list goes on
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07-17-2007, 03:29 AM
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3800 Guru
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Anthony Kunarski
Location: SE Michigan
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r0b0t c0rpse holds the following arcade championships:
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i wish i had that problem
strong vacuume in the crank case is free horsepower.
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07-17-2007, 09:03 AM
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3800 Senior Member
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Justin Hartley
2000 MCSS
Location: Moyock, NC
Join Date: Sep 2004
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Abysalone holds the following arcade championships:
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Check your PCV valve and make sure it has both o-rings. One goes on the PCV valve itself, and the other on the cap that holds the PCV in.
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Built 8.0:1 block--SS4 Cam--S4 heads--N*,LQ4--Fully built trans w/3.69's--Stattama S4 CSC-- Custom Cobra IC--Powertuned--And it RUNS 
http://www.cardomain.com/ride/320925
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07-17-2007, 09:29 AM
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3800 Guru
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Billy Meek
Bermuda Blue 05 GTP Comp G
Location: Keaau, Hawaii
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fastech holds the following arcade championships:
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Quote:
Originally Posted by r0b0t c0rpse
i wish i had that problem
strong vacuume in the crank case is free horsepower.
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Hehe! Yea, without the weight of a vacuum pump!!!
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3.4, Wizaired, 3" DP w/magnaflow cat, no res., 42.5's, 180 deg., altered 104's, HPT, Toyo T1R's, Beltronics RX65 radar detector (has saved my tail many times).
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07-17-2007, 11:26 AM
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Brian Turner
1988 Mustang Twin Turbo
Location: Columbus Ohio
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Dyno Brian holds the following arcade championships:
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I still have alot to learn about the 3800's. However, it does sound like a intake gasket leak to me as well.
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07-17-2007, 01:01 PM
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3800 Member
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mike sesto
Location: connecticut
Join Date: Jan 2007
Posts: 60
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montecarlossfan holds the following arcade championships:
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well i believe it has to do with the adapter plate blocking off a pcv passage where the tb is...a 10k motor shouldnt have a leak like that as far as i knoiw
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