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Which vacuum lines can I cap off? Egr delete

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Old Apr 8, 2023 | 04:21 PM
  #1  
88BLKTransAmGTA's Avatar
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From: Arkansas
Car: 1988 Trans Am GTA
Engine: 5.7 L98
Transmission: 700R4
Axle/Gears: 3.77
Which vacuum lines can I cap off? Egr delete

88 TPI 350. I removed my smog pump will be adding a delete pulley, Did the egr delete with block off plate. Pulling the headers off and air tubes for some hooker shortys. Also have custom prom.
My questions are which lines can I cap?
Do I just leave the canister attached?
The one picture with 2 vacuum lines- One goes under the throttle body the other went to the egr. Do I just cap off the one that went to the egr Valve?
The T on the other side- can i cap any of these off?




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Old Apr 8, 2023 | 05:27 PM
  #2  
Komet's Avatar
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From: WA
Car: 1989 IROC-Z
Engine: L98 350 TPI
Transmission: 700R4
Axle/Gears: BW 9 Bolt / 2.77 Posi
Re: Which vacuum lines can I cap off? Egr delete

I recommend cracking open the factory service manual and identifying each hose. Then you'll know which ones are needed for what. Generally speaking, you need to cap off the connections made to the former egr valve and solenoid.
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Old Apr 8, 2023 | 05:46 PM
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Tuned Performance's Avatar
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Car: 1967 Camaro, 91 z28
Engine: Lb9
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Re: Which vacuum lines can I cap off? Egr delete

all the egr lines can go cap under throttle body.
the ccp id leave hooked up to throttle body.
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