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Too much vacuum? Issue!

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Old Jun 22, 2013 | 07:21 PM
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ehill101's Avatar
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Default Too much vacuum? Issue!

Many thanks in advance but here is the issue.

Short story: Changed all clutch components now pulling too much Vacuum.

Long story: Recently I changed out the clutch and Master/Slave cylinders to the clutch to a Tick and Monster 4 setup. Since then I have had an issue with pulling too much vacuum (18" normally, now 21-23') which is pulling the engine down to almost a stall. During the Tick Master install I had to remove the Brake Booster and it caused it to leak so I then replaced it. Still have a strong vacuum pull once warmed up any ideas?

Mods are:
D&D performance built transmission
Billet Pro Series Shifter
Gforce1320 1000hp carbon fiber one piece drive shaft
Gforce1320 level 3 300m anti-wheel hop axels
Gforce1320 level 3 inner stubs
Monster stage 4 clutch
Tick performance remote clutch speed bleeder
Tick performance Tick shift master cylinder
APS Twin Turbo
BMR drag bags
Gforce1320 3.73 rear end
Gforce1320 detriot trutrac
Harrop Diff cover
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Old Jun 23, 2013 | 12:27 AM
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This doesn't make any sense at all.
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Old Jun 23, 2013 | 10:13 AM
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whats your idle set at ?check your IAC ,any codes ?
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Old Jun 23, 2013 | 11:17 AM
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SS10Tech's Avatar
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What year is the motor. Sounds like a PCV issue to me.

High manifold vacuum at idle shuts the valve in a PCV even more tight. This will cause some large vacuum levels if there is not a place for the motor to breathe.

Any oil in the manifold or catch can?

Also food for thought - be sure that you evacuated all of the air from the brake system. Part changes like that at one time can cause some monstrous air pockets.
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