Vacuum line issues
Thread Starter
2nd Gear
Joined: Feb 2026
Posts: 2
Likes: 0
Vacuum line issues
Hi i just recently bought my first corvette last week and im trying to get it to idle strong. I changed the maf sensor and that helped a little bit but now its bogging down till it almost dies and then it revs up. I went to investigate and saw that all the vacuum lines for egr system have been sniped and i suspect thats my problem. I ordered some vacuum hoses of various sizes and i planned to replace all of my vacuum hoses just to make sure i get rid of all the vacuum leaks but i wanted to make sure i could use that to replace the whole system or if theres any specific parts i will need. I also want to see if im on the right track to getting my car idling strong.
the kit i ordered has 6.6 feet of 1/4”, 3/16”, 5/32”, and 1/8”. Im not a master mechanic by any means im just working my way through one problem at a time with chat gpt, youtube, and whatever forums i can find that are relevant.
the kit i ordered has 6.6 feet of 1/4”, 3/16”, 5/32”, and 1/8”. Im not a master mechanic by any means im just working my way through one problem at a time with chat gpt, youtube, and whatever forums i can find that are relevant.
Drifting
Joined: Feb 2016
Posts: 1,384
Likes: 339
From: Simi Valley CA
Make sure to get a factory service manual. These cars show up in the pick ur parts wrecking yards and that’s probably the easiest way to find all the lines. There’s a vacuum line that goes through the firewall to control the hvac. That line is made out of soft rubber and often is rotted. Good luck hunting.
Thread Starter
2nd Gear
Joined: Feb 2026
Posts: 2
Likes: 0
Make sure to get a factory service manual. These cars show up in the pick ur parts wrecking yards and that’s probably the easiest way to find all the lines. There’s a vacuum line that goes through the firewall to control the hvac. That line is made out of soft rubber and often is rotted. Good luck hunting.
Drifting
Joined: Sep 2022
Posts: 1,475
Likes: 393
From: Liberty, SC
2023 C4 of the Year Finalist - Unmodified
This thread has a picture of the 84 model year vacuum routing.
84 corvette vacumn system and throttle body fuel lines - CorvetteForum - Chevrolet Corvette Forum Discussion
I don't see that you posted a MY of your car.
Use the Advanced search for 'routing' of the C4 forum and you'll get a lot of results.
84 corvette vacumn system and throttle body fuel lines - CorvetteForum - Chevrolet Corvette Forum Discussion
I don't see that you posted a MY of your car.
Use the Advanced search for 'routing' of the C4 forum and you'll get a lot of results.
