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7/14/11 3:56pm - Reply: 'Chirping noise'
The Rook Lifetime Member
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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
good luck with that throttle issue.......Embarrassed

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7/14/11 5:42pm - 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

Joined: 11/8/2003
Posts: 19457
Albo, you could still have an issue with the EGR, even tho it wants to die when you lift the diaphragm. It could have a small chunk of doo-doo(hi-tek term for crap) in it that will not let it seat fully, and cause weird prollems.
The chirp noise may or may not be associated with the EGR, but...if there has been a leak in the EGR for a while it can lead to the base gasket of the carbatator burning out, and THAT can cause a chirp noise.


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Joel Adams
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7/14/11 8:01pm - 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

Joel, car ran pretty crapy tonight lots of hesitation, when I accelerate it goes but when you just cruise you feel it holding back.

Good friend of mine in our vette club is an older retired mac tool salesman, he's fantastic on Carbs. He asked me when the last time the carb was kitted and I said never. He said I think it is deserving of a kit. I'll pull the carb this weekend and have him rebuild it. Coming down hill to my drive way I down shifted to 2nd and it chirped then also, almost seems like an exhaust leak. When it goes through the gears its in puurrrfect harmony with the RPM's

So how much are EGR valves is it a no brainer to just replace it anyhow?

Evil Smileebo



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7/14/11 9:16pm - 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

Joined: 11/8/2003
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EGR is a simple bolt off/bolt on deal...assuming the bolts are not seized in the intake. Soak em down well before trying to remove them.

The chirping could be an exhaust leak, depending on whether or not you have metal gaskets on the manifolds where they bolt to the heads. They can "whistle" at times, and it may get worse when you let off the pedal. IF you have a catalytic converter that is semi-stopped up, the extra backpressure could also cause an exhaust leak to make a whistle/chirp noise....as could a lonely cricket under the seat....


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7/23/11 2:29pm - 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 put the rebuilt Q-jet back on and went for a spin, still have the hesitation and the chirp. Since I have run some of engine additive maybe cat is plugged would that cause hesitation?

I'm pretty sure all the hoses are good as I was able to check that all real good with the carb off.

And still not sure about the egr valve? Plus I guess even though it does not sound it wonder if I do have a bad spark plug. I know last fall when I did change the plugs one was loaded with the white yellow deposits......

Carb looks great thoughBig smile the guy rebuilding it said he never saw one with the anodize still looking like new, light brushing with laquer thinner cleaned it right up.

Car is drivable but anoying.....Confused
Evil Smileebo


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7/23/11 2:53pm - Reply: 'Chirping noise'
The Rook Lifetime Member
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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
See and you all laughed about my radio problems.....If you had a kicking sytem like me you could just crank the music a wee bit louder than the chirp...problem solvedRolling On The Floor Laughing

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7/23/11 8:24pm - Reply: 'Chirping noise'
Jaws79 Lifetime Member
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Sykesville, MD - USA

Vette(s):
1979 Corvette Coupe Corvette Light Blue Midnight Blue interior Mirrored Glass T-tops

Joined: 4/27/2008
Posts: 4211
You could always put louder exhaust on it! That'll droan out the noises!
 
Barry
 
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7/24/11 8:42am - 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
See now this is why nobody joins Wink
 
I know it can only be a few things, I had a bad dream last night I was driving along and the car just died......Confused whats up with that.
Might be tied into what happened at home friday, my 13 yr old son (sorry off topic, refer to first sentice) was running my 3 yr old troy built power washer with a 5 hp Honda engine. All of a sudden it started blowing blue smoke and shut offAngry
Once cooled down I tryed to pull it over, it will pull over and do not hear any clanking but it will not fire and it smell of gear oil?    
I'll mess with the car some more if I get a chance, I may have to get under it and pull the plugs, I hate the thought of dealing with those heat shieldsOuch
Evil Smileebo
Well barb will be here in a few days she can fix anything.....Big smile


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7/24/11 9:03am - Reply: 'Chirping noise'
lukesvette Lifetime Member
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HOWELL, NJ - USA

Vette(s):
1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.

Joined: 5/18/2004
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ebo, you confirmed that ya ain't got no vacuum leaks? Check your manifold bolts, brake booster line, headlight lines etc? No old cracked vac lines?

And about the suckin and blowin the valve and playing with the throttle, let's keep in clean or momma won't let me play here no more!!Embarrassed


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7/24/11 9:10am - 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=lukesvette]ebo, you confirmed that ya ain't got no vacuum leaks? Check your manifold bolts, brake booster line, headlight lines etc? No old cracked vac lines?

And about the suckin and blowin the valve and playing with the throttle, let's keep in clean or momma won't let me play here no more!!Embarrassed
[/QUOTE]
Paul sorry...duly noted dang Rook made me say it.Big smile
All vacume lines looked great no brittleness or swelling or cracking, the engine bay did not see daylight for years. The chirping noise is what puzzles me it is matched to the RPM speeds up untill shift then speeds up untill shift.
I'm thinking of replacing the egr valve they run between 30 and 120 bucks depending where you buy.
Evil Smileebo


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7/24/11 10:02am - Reply: 'Chirping noise'
eddie20875 Lifetime Member
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Lanoka Harbor, NJ - USA

Vette(s):
1975 metallic blue coupe with t-tops,L48, t/t steering, black leather interior. 1990 L98, white/red leather interior, auto,a/c

Joined: 12/21/2006
Posts: 828
if i may add my 2 cents here...ebo it may very well be a clogged exhaust. on my 90 it got clogged and when it idled it sounded great but when you were driving you could feel it working harder and there was a visible drop in power. replaced exhaust and car ran great. they do make a pressure guage that measures the amount of pressure coming out but never saw or used one. if the exhaust system needs changing you may be able to fix your problem easily.

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7/24/11 10:33am - Reply: 'Chirping noise'
lukesvette Lifetime Member
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HOWELL, NJ - USA

Vette(s):
1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.

Joined: 5/18/2004
Posts: 6806
Can you hear it at idle? I had a chirping noise once and it turned out to be a dry water pump bearing...bearing full;y wiped shortly thereafter, but this wouldn't contribute t a stumble...



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7/24/11 1:35pm - 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
Can not hear it at idle, days before resistor wires you could hear the RPM thru your radio. Well going down the road it's just like that but it's a chirping sound and it matches the RPM.
Exhaust seems good no rust, not loud, I lose the stumble if I accelerate.
Evil Smileebo


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7/24/11 2:11pm - Reply: 'Chirping noise'
eldredjames Lifetime Member
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Temple City, CA - USA

Vette(s):
1969 Daytona Yellow. 350 / Automatic.

Joined: 10/3/2010
Posts: 361
[QUOTE=ebo]See now this is why nobody joins Wink
 
sorry off topic, refer to first sentice) was running my 3 yr old troy built power washer with a 5 hp Honda engine. [/QUOTE]

The value of off-topic:  In the 70's I wanted a troy-built tiller so bad!  That's all they made.  Couldn't afford even that toy.  But I saw your post today and searched on Troy built....  whole new world of goodies to look at so Thanks Ebo!


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7/24/11 2:19pm - 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=eldredjames] [QUOTE=ebo]See now this is why nobody joins Wink
 
sorry off topic, refer to first sentice) was running my 3 yr old troy built power washer with a 5 hp Honda engine. [/QUOTE]

The value of off-topic:  In the 70's I wanted a troy-built tiller so bad!  That's all they made.  Couldn't afford even that toy.  But I saw your post today and searched on Troy built....  whole new world of goodies to look at so Thanks Ebo!
[/QUOTE] Glad to help just to update you Troybuilt went out of buisness MTD bought the name, and Briggs and Stratten is partners also. Only thing troy built is the sticker! Ouch
Evil Smileebo


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LIFETIME MEMBER 151
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