C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

EGR vacuum lines

Thread Tools
 
Search this Thread
 
Old Aug 19, 2025 | 06:24 PM
  #1  
mystichrome's Avatar
mystichrome
Thread Starter
Cruising
 
Joined: Aug 2025
Posts: 14
Likes: 7
Default EGR vacuum lines

Long story short I’m trying to just disable my EGR temporarily while I wait to find a right manifold for my 87 to change the shitty clamp design EGR pipe.

I am blocking both ends of the EGR pipe itself - I know I need to plug the vacuum line from the solenoid to the EGR valve.

Someone else has told me there are other vacuum lines I need to plug - I’ve been staring at the diagram in the FSM.

Another newb question - when I plug a vacuum line do I plug both the hose and where it attached?

this car is my learning car haha
Reply
Old Aug 19, 2025 | 07:29 PM
  #2  
AGENT 86's Avatar
AGENT 86
Team Owner
20 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
Active Streak: 90 Days
 
Joined: Jan 2003
Posts: 20,292
Likes: 239
From: Summerland B.C. Canada
Default

Just plug the vacuum line you pull off the EGR valve.
Reply
Old Aug 20, 2025 | 07:32 AM
  #3  
mystichrome's Avatar
mystichrome
Thread Starter
Cruising
 
Joined: Aug 2025
Posts: 14
Likes: 7
Default

Originally Posted by AGENT 86
Just plug the vacuum line you pull off the EGR valve.

so there isn’t any other lines that go anywhere else that I need to plug? Solenoid? To the evap canister?
Reply
Old Aug 20, 2025 | 08:19 AM
  #4  
AGENT 86's Avatar
AGENT 86
Team Owner
20 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
Active Streak: 90 Days
 
Joined: Jan 2003
Posts: 20,292
Likes: 239
From: Summerland B.C. Canada
Default

Originally Posted by mystichrome
so there isn’t any other lines that go anywhere else that I need to plug? Solenoid? To the evap canister?
No, Just one plug
Reply
Old Aug 20, 2025 | 08:37 AM
  #5  
mystichrome's Avatar
mystichrome
Thread Starter
Cruising
 
Joined: Aug 2025
Posts: 14
Likes: 7
Default

Originally Posted by AGENT 86
No, Just one plug
ok awesome thanks and I could keep it this way with driving it on weekends a few miles here and there until October and that’s fine?
plan is to remove the air, smog valve over the winter storage season
Reply

Get notified of new replies

To EGR vacuum lines





All times are GMT -4. The time now is 02:48 AM.

story-0
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-1
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-2
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-3
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-4
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-5
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-6
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-7
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-8
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE
story-9
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE