Help with PVC 86E!!
Thread Starter
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
Help with PVC 86E!!
I found a vac leak today. It is in the aluminum tubing located on the drivers side just above the valve cover. This is the vac for the PVC. My problem is starting at the intake manifold there is a rubber hose that connects to the aluminum tube. The tube goes toward the front of the engine (only about 8-9" long). The PVC hose and PVC connects about half way down the tube. My leak is in the end of the tubing close to the alternator. There is a hole about the size of a pencil eraser. Is a hose connect here or what? When I put my finger over the end of the tube the engine want to die. I feel I'm not getting full vac to the PVC 
. Any help will be appreciated.
EDIT: I have the FSM and don't see anything about this.
. Any help will be appreciated.EDIT: I have the FSM and don't see anything about this.
Safety Car
Joined: Nov 2004
Posts: 4,991
Likes: 5
From: The Pines South Jersey
the end of that tubing should have a hose from the charchol canister by the drivers side turn signal side marker area.
I disconnected mine and tucked the hose behind the tubing the runs inside the fender well, and it looked so good I couldnt find it after a few weeks of not getting back to the project - i put a bypass cap on the end of the pipe you refer to as a hole - its actually a nipple ( if we're talking bout the same thing) - mine never ran better or worse with it disconnected
I disconnected mine and tucked the hose behind the tubing the runs inside the fender well, and it looked so good I couldnt find it after a few weeks of not getting back to the project - i put a bypass cap on the end of the pipe you refer to as a hole - its actually a nipple ( if we're talking bout the same thing) - mine never ran better or worse with it disconnected
Thread Starter
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
I just went to town and bought a rubber cap for it. I put my finger over it and it didn't die just lowered the RPM's. I drove it for about 10miles round trip. It didn't idle up and down anymore and overall drove good. If this fixed it the only problem I have now is rich exhaust.
Safety Car
Joined: Dec 2004
Posts: 4,088
Likes: 0
From: Poop land
The complete elimination of the charcoal canister system especially helped my idle during a warm start up. I plugged the 2 vacuum ports on the TB. The vacuum port on the bottom of my TB was also shared by the EGR so don't be surprised if you get an EGR code if your ECM isn't tuned to ignore it.
Le Mans Master
Joined: Oct 2003
Posts: 6,130
Likes: 2
From: seattle WA
I find this totally wierd..my 87 is totally stock, that metal tube comes from the intake just in front of the second to last injector...drivers side,
comes forward to where the PCV connects, a little beyond, and mine has no place for a hose, and my cannister has all vac. lines connected.
I've looked through the FSM for a clear picture and cannot see anywhere that's shown...is an 87 different than an 86? I kinda doubt it.
Any pictures?
comes forward to where the PCV connects, a little beyond, and mine has no place for a hose, and my cannister has all vac. lines connected.
I've looked through the FSM for a clear picture and cannot see anywhere that's shown...is an 87 different than an 86? I kinda doubt it.
Any pictures?
Thread Starter
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
Originally Posted by bogus
gee, can you post a picture?
I wonder if the PCV is blocked...
I wonder if the PCV is blocked...
Originally Posted by rick lambert
I find this totally wierd..my 87 is totally stock, that metal tube comes from the intake just in front of the second to last injector...drivers side,
comes forward to where the PCV connects, a little beyond, and mine has no place for a hose, and my cannister has all vac. lines connected.
I've looked through the FSM for a clear picture and cannot see anywhere that's shown...is an 87 different than an 86? I kinda doubt it.
Any pictures?
comes forward to where the PCV connects, a little beyond, and mine has no place for a hose, and my cannister has all vac. lines connected.
I've looked through the FSM for a clear picture and cannot see anywhere that's shown...is an 87 different than an 86? I kinda doubt it.
Any pictures?
http://www.huntforpro.com/Chris/vacuum.jpg
This doesn't show it either but it is a perfectly round hole for a hose to attach to. Weird....
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Team Owner
Joined: Jan 2003
Posts: 20,320
Likes: 248
From: Summerland B.C. Canada
The 86 and 87 are different. 87 takes the fumes from charcoal canister via the TB and the 86 takes it from the intake manifold. The PCV and the charcoal canister share that aluminum tube going into intake base.
That picture doesn't look like my 86 vacuums.
