Wiper door vacuum problems
Racer
Joined: Jul 2004
Posts: 286
Likes: 1
From: Mesa az
Just a note. I also had an erratic idle problem and went through all the vac leaks, throttle settings, etc. Finally found the distributor shaft had too much end (up/down) play. It'd actually change the timing due to the gearing and cause the engine to idle fast or slow. I rebuilt the distributor and all is fine now.
Andy
Andy
Heel & Toe
Joined: Aug 2011
Posts: 19
Likes: 0
hey vetteguy, did you get the pinching thing figured out? Mine was doing that as well and I noticed a screw had been placed in the vent hose of the safety control valve (under the right wiper), once screw was removed and the valve adjusted to close more when the wipers are down, this issue did not happen to me anymore.
6th Gear
Joined: Mar 2015
Posts: 6
Likes: 0
From: henderson nv
need help--wiper cover```thanks
Last edited by n15gre; May 11, 2015 at 07:18 PM. Reason: forgot email
Team Owner
Joined: Jul 2006
Posts: 22,139
Likes: 4,156
From: Kannapolis NC
Hi--I would like your vacuum diagram for the wiper door system. my cover stays down, opposite from most folks problem. email n15gre@hotmail.com
Race Director
Joined: Oct 2008
Posts: 19,143
Likes: 1,667
From: Long Island
http://www.google.com/imgres?imgurl=...d=0CDwQMygYMBg
Last edited by BLUE1972; May 11, 2015 at 11:19 PM.
2nd Gear
Joined: Apr 2014
Posts: 2
Likes: 0
1969 diagram available?
Thank you.
JV
jvinaustin@gmail.com
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
Melting Slicks
Joined: Apr 2009
Posts: 2,632
Likes: 112
From: Great Plains Iowa
Another Urban Myth Busted
Just a note. I also had an erratic idle problem and went through all the vac leaks, throttle settings, etc. Finally found the distributor shaft had too much end (up/down) play. It'd actually change the timing due to the gearing and cause the engine to idle fast or slow. I rebuilt the distributor and all is fine now.
Andy
Andy
"Distributor End Play Causes Timing Fluctuations" is another urban myth. As the camshaft turns the dynamic forces of the camshaft gear turning the distributor gear cause the distributor shaft to be forced UP against the thin steel thrust washer (at the bottom of the shaft). The distributor can have an 1/8" end play and still maintain perfect timing because of those dynamic forces. Removing the end play doesn't hurt anything but it also doesn't help anything.
Team Owner
Joined: Sep 2006
Posts: 31,169
Likes: 4,245
From: Westminster Maryland
Hi fcb,
WELCOME! First Post!
The problem you describe generally has to do with the position (adjustment) of the wiper door interlock switch. It's purpose is to insure that the right side wiper is fully down and parked before the door begins to close so the door doesn't close on and trap the wiper arm or blade as you describe.
Check it's adjustment using the 2 bolts that attach it to it's bracket in the wiper well.
The short arm attached to the wiper transmission pushes on the plunger of the interlock switch…. moving the switch 'down' makes the wiper arm need to be further closed before the plunger is fully pushed.
Good Luck!
Regards,
Alan
WELCOME! First Post!
The problem you describe generally has to do with the position (adjustment) of the wiper door interlock switch. It's purpose is to insure that the right side wiper is fully down and parked before the door begins to close so the door doesn't close on and trap the wiper arm or blade as you describe.
Check it's adjustment using the 2 bolts that attach it to it's bracket in the wiper well.
The short arm attached to the wiper transmission pushes on the plunger of the interlock switch…. moving the switch 'down' makes the wiper arm need to be further closed before the plunger is fully pushed.
Good Luck!
Regards,
Alan
Last edited by Alan 71; Nov 1, 2015 at 11:35 AM.
Race Director
Joined: Oct 2008
Posts: 19,143
Likes: 1,667
From: Long Island
Drifting
Joined: Jul 2006
Posts: 1,259
Likes: 154
From: Deplorableville Nebraska
What is the best way to get one unstuck when it is trapped in the wiper door?
6th Gear
Joined: Nov 2015
Posts: 6
Likes: 0
Wiper Stuch
Thanks, I can get the door up but now the wiper wont return to the down position. I saw this happen on a friends car a while ago. i can't track him down to find out what he did. Thanks again
