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7/12/11 7:51am - Original Message: 'Chirping noise'
ebo Lifetime Member
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Holland Patent, NY - USA

Vette(s):
#1 *1980 White, Red interior 14,000 mile #2 *1980 Red, Oyster interior 93,000 miles Resto project car, rebuilt to 383 stroker

Joined: 6/3/2008
Posts: 4395
So I still have my hesitation, I checked the plugs to make sure all was connected, rechecked the firing order, thats all good. Put my trusty Champion spark plug pen on the wires when car was running to make sure wires were sending voltage to the plugs (love that antique pen) seperated the #5 & #7 wires to make sure they are not cross fireing.
When it's in 3rd gear overdrive (Auto) and has any slight hill to climb it bucks slightly, no back fires, if I shift it down its better.
Had the tops off the other day (took ebo woman to lunch topless) I could here a chirping sound matching the tune of the RPM's of the transmission.........
So now I'm thinking I may have knocked a vacume line off...or the "Rook" cut one of my hoses.
Thoughts.............I know Joel nuttin a match can't fix!
Evil Smileebo


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7/12/11 8:07am - Reply: 'Chirping noise'
manchestershark Lifetime Member
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Equinunk, PA - USA

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1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.

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Bucking, May be the carb. It is called a "Tip in stumble". Worn carb at a certain RPM. Gas at the top of the plate does not match the vaccume at bottom, or vice versa. Solved mine with a re-build.
   The chip could be a "U" joint goin bad/dry. Rock it back and forth on flat ground by hand and see if ya feel any grateing or roughness in the tire or driveline.  DO NOT run it with tires off the ground, NOT GOOD for the half shafts/U-joints. Then do a process of elimination.  LOL


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7/12/11 8:15am - Reply: 'Chirping noise'
ebo Lifetime Member
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Holland Patent, NY - USA

Vette(s):
#1 *1980 White, Red interior 14,000 mile #2 *1980 Red, Oyster interior 93,000 miles Resto project car, rebuilt to 383 stroker

Joined: 6/3/2008
Posts: 4395
Mark I was thinking carb, this car sat for so long it may have some gumming or crude comming loose now that it's getting some miles on it. I'm going to try and look at it today after work. I'll see if I can here the chirping while its in park. All U- Joints are original...........Maybe you need to come up a few day's early at the end of the month.....LOL
Evil Smileebo


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7/12/11 8:19am - Reply: 'Chirping noise'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

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Why waste a match?

A "chirping" noise, along with the bucking/hesitation, kinda sounds like an EGR issue, but it could very well be a vacuum leak...somewhere. Your mission, Mr. Phelps, should you decide to accept, is to find said vacuum leak, and repair. As always, if you, or any of your vacuum impossible crew should be found and fixed, we shall disavow any knowledge of your existence.... Geek

And...maybe check the carb baseplate/gasket...

A 3 speed overdrive?
Adams' Apple2011-07-12 05:26:11

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7/12/11 8:26am - Reply: 'Chirping noise'
ebo Lifetime Member
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Holland Patent, NY - USA

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#1 *1980 White, Red interior 14,000 mile #2 *1980 Red, Oyster interior 93,000 miles Resto project car, rebuilt to 383 stroker

Joined: 6/3/2008
Posts: 4395
Joel pretty sure I replaced that but i'll check it also....I forgot..... do you blow in the vavle to see if it's good .....or try to suck air out to see if it's good? Big smile
I think I'll just shake it...........and see if it sounds like one of your pet snakes.
Evil Smileebo
Thanks bro
Overdrive , lock up what ever you tranny guys call it......LOL
ebo2011-07-12 05:28:00

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7/12/11 8:35am - Reply: 'Chirping noise'
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Flanders, NJ - USA

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1982 Black, ZZ4, Hooker Side Pipes, 3.55 Rear, Rebuilt & upgraded 700R4, All new suspension, brakes, & new Charcoal interior.

Joined: 1/27/2004
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Check for a bird's nest.
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7/12/11 8:44am - Reply: 'Chirping noise'
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Sykesville, MD - USA

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1979 Corvette Coupe Corvette Light Blue Midnight Blue interior Mirrored Glass T-tops

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You're such a mechanic, Dave!
 
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7/12/11 1:25pm - Reply: 'Chirping noise'
manchestershark Lifetime Member
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Equinunk, PA - USA

Vette(s):
1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.

Joined: 10/31/2007
Posts: 1895
Smile I would be MORe than happy to help.

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7/12/11 10:52pm - Reply: 'Chirping noise'
yostusota
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York, PA - USA

Vette(s):
1969 daytona conv. all original 350 350 380 4 sp w/air..and hard top

Joined: 5/18/2010
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The tip in as Mark puts it is a setting in the carb that is done with those GM tools..I don't have....the stumble very well may be the egr valve not fully closed or maybe slightly stuck open..plate off the egr and see if it goes away..

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7/13/11 7:31am - Reply: 'Chirping noise'
ebo Lifetime Member
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Holland Patent, NY - USA

Vette(s):
#1 *1980 White, Red interior 14,000 mile #2 *1980 Red, Oyster interior 93,000 miles Resto project car, rebuilt to 383 stroker

Joined: 6/3/2008
Posts: 4395
Heh Rich, thanks..."plate off the EGR"?  Do you mean remove and block hole in valve cover?
Evil Smileebo 


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7/13/11 7:39am - Reply: 'Chirping noise'
yostusota
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York, PA - USA

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1969 daytona conv. all original 350 350 380 4 sp w/air..and hard top

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Remove the egr valve and put a plate over it ..I think mr gasket sells them at auto zone..sometimes they stick just a little bit..or are getting vacuum when they shouldn't..can be enough dilution to create a stumble..or vacuum advance is acting up also..

Rich

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7/13/11 10:37pm - Reply: 'Chirping noise'
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Duncanville, TX - USA

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#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

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If your EGR valve is in any way connected to the valve cover, I think we've found your problem!
The EGR valve is bolted to the intake manifold, pass side, just to the rear of the carb. I think you may be confusing EGR valve with the PCV valve, which DOES go into the valve cover.




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7/13/11 10:50pm - Reply: 'Chirping noise'
ebo Lifetime Member
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Holland Patent, NY - USA

Vette(s):
#1 *1980 White, Red interior 14,000 mile #2 *1980 Red, Oyster interior 93,000 miles Resto project car, rebuilt to 383 stroker

Joined: 6/3/2008
Posts: 4395

Dang tex you is gooooddddd!

Yes I was duh...sorry I checked all the hose tonight and everything is connected PCV rattled fine. Then I started thinkin...that happens only on a full moon like tonight. "They said EGR...not PCV"

And I searched out a thread here from Keyster explaining how to check the EGR valve while the car is running it was from 2005 and pretty detailed. So you done have sum of dat ESP goin as You must ta known I was readin bout it.............

I'll check the EGR tomorrow night.

Thanks so much for kickin me to wake me up!

You da man!

Evil Smileebo



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7/13/11 11:29pm - Reply: 'Chirping noise'
Jaws79 Lifetime Member
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Sykesville, MD - USA

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1979 Corvette Coupe Corvette Light Blue Midnight Blue interior Mirrored Glass T-tops

Joined: 4/27/2008
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Ebo, Ebo, what we gonna do  wit you?
 
Barry
 
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7/14/11 12:44am - Reply: 'Chirping noise'
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Oak Creek, WI - USA

Vette(s):
1981 Great White Shark. Red Interior, 350/190hp. PS, PB (SS), A/C CC, T-Tops, Going to remain as Stock as possible. Served three years in Active Duty Army, then Retired Air Force after 34 years! Badger State Vetts Car Club. 175,000 Original miles!!

Joined: 5/21/2008
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Ebo, my main man!!  Just feed dem squirrle's and the chirping will stop!!
Dan da Man Rolling On The Floor Laughing


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7/14/11 9:14am - Reply: 'Chirping noise'
ebo Lifetime Member
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Holland Patent, NY - USA

Vette(s):
#1 *1980 White, Red interior 14,000 mile #2 *1980 Red, Oyster interior 93,000 miles Resto project car, rebuilt to 383 stroker

Joined: 6/3/2008
Posts: 4395
[QUOTE=Jaws79]Ebo, Ebo, what we gonna do  wit you?
 
Barry
 
Wits End
[/QUOTE]
Moma always said "You can't fix Stupid" Confused
Evil Smileebo


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7/14/11 12:39pm - Reply: 'Chirping noise'
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Irving, TX - USA

Vette(s):
#1 -1969 Corvette Coupe Riverside Gold, black interior,MN,A/C,350/350,PS,PB,window cranks. #2 -2000 C5, black/black, 6 sp, Bose system & lots of buttons.

Joined: 8/21/2004
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Ebo, your car is just happy, that's why it's chirping................LOL

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7/14/11 2:20pm - Reply: 'Chirping noise'
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Pittsburgh, PA - USA

Vette(s):
1979 L-82, 3 spd auto, car was originally Lt. Beige currently painted Sportsman Red, Doeskin leather interior, 103,000 miles......

Joined: 12/4/2002
Posts: 600

"So now I'm thinking I may have knocked a vacume line off...or the "Rook" cut one of my hoses"?????

Wait a tick......You're supposed to be the evil one............
 
 


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7/14/11 3:59pm - Reply: 'Chirping noise'
ebo Lifetime Member
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Holland Patent, NY - USA

Vette(s):
#1 *1980 White, Red interior 14,000 mile #2 *1980 Red, Oyster interior 93,000 miles Resto project car, rebuilt to 383 stroker

Joined: 6/3/2008
Posts: 4395

I'm about to go out and play with the EGR valve following Kens sequence below.

http://www.c3vr.com/forum/topic61048&OB=ASC.html
And this is why this darn site is so frickin great!!!!!!!
And I'don't give a crap if I'm off topic    it's my dang thread!
Man I love you guys!!!LOLLOL
Evil Smileebo
 
 

 

 

 



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7/14/11 4:45pm - Reply: 'Chirping noise'
ebo Lifetime Member
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Holland Patent, NY - USA

Vette(s):
#1 *1980 White, Red interior 14,000 mile #2 *1980 Red, Oyster interior 93,000 miles Resto project car, rebuilt to 383 stroker

Joined: 6/3/2008
Posts: 4395

OK first test worked just like Ken said, push up from bottom of valve and car wants to die out. I'm off to a cruise night so will try next check when I get home and ebo woman can work the throttle for me.

 let me clarify....The Gas pedal......man I should know better to pick my wordsConfused

Evil Smileebo


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