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TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.

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Old 02-28-2008, 02:55 PM   #1
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Car: 88' Camaro IROC-Z
Engine: 383ci TPI
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Some help with vacuum lines please?

I think my tank pressure control valve might be installed backwards after trying to interpret the autozone vacuum line schematic the best I can. Here's a pic:



I've tried to illustrate how my lines are all hooked up and I hope someone will take the time to look at it and explain what I need to change. Here it is, sorry it's so sloppy.



Thanks guys!
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Old 02-28-2008, 03:12 PM   #2
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Re: Some help with vacuum lines please?

I just found this picture in another thread and It clears up that my control valve should be connected to the top port on my canister, I'm missing the valve/hoses that it shows going from the gas tank line to the bottom port however.

However, I'm more confused about the smaller of the two lines connected to the control valve, where is that vacuum coming from? Also, the autozone schematic doesn't show a valve inline going from the bottom port of the throttle body to the top port of the canister. And in this picture, the valve going to the gas tank line is installed opposite the autozone schematic.


Last edited by IROCWPB; 02-28-2008 at 03:16 PM.
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Old 02-29-2008, 12:14 PM   #3
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Car: 88' Camaro IROC-Z
Engine: 383ci TPI
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Re: Some help with vacuum lines please?

Anyone who has a car of similar year that hasn't been rigged to hell should be able to answer this just by looking at their own setup, someone please try?
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Old 02-29-2008, 12:14 PM
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