C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

Dying at idle

Thread Tools
 
Search this Thread
 
Old Oct 19, 2021 | 05:23 PM
  #1  
tknospdr's Avatar
tknospdr
Thread Starter
Pro
 
Joined: Oct 2020
Posts: 503
Likes: 139
Default Dying at idle

Drove the car with no issues 4 days in a row, this morning it died at a red light, I had to floor the accelerator to get it started again after about a minute of trying.
Happened a 2nd time about half a mile later.
3rd time it bucked really bad before it died.
Here’s a short clip sitting in a parking lot after the 3rd incident.
Reply
Old Oct 19, 2021 | 05:25 PM
  #2  
tknospdr's Avatar
tknospdr
Thread Starter
Pro
 
Joined: Oct 2020
Posts: 503
Likes: 139
Default

Here’s the clip… I think.
Reply
Old Oct 19, 2021 | 05:25 PM
  #3  
tknospdr's Avatar
tknospdr
Thread Starter
Pro
 
Joined: Oct 2020
Posts: 503
Likes: 139
Default

Alright, either they’re not posting cause I’m on cellular, or they’ll show up soon.
Reply
Old Oct 20, 2021 | 08:09 PM
  #4  
Mrvettenick's Avatar
Mrvettenick
Drifting
All Eyes On Me
Liked
 
Joined: Aug 2019
Posts: 1,339
Likes: 225
Default

Without know all the facts....is the choke opening? If so, does it act up after a while? If it acts up only when warm, it could be flooding from a stuck needle. When it acts up. look down the carburetor to see if fuel is running down the carb throat. If so, then the float needle may be sticking, causing the float level to be too high.
Reply
Old Oct 20, 2021 | 08:34 PM
  #5  
tknospdr's Avatar
tknospdr
Thread Starter
Pro
 
Joined: Oct 2020
Posts: 503
Likes: 139
Default

I stuck it on YT...

Reply
Old Oct 20, 2021 | 08:36 PM
  #6  
Mrvettenick's Avatar
Mrvettenick
Drifting
All Eyes On Me
Liked
 
Joined: Aug 2019
Posts: 1,339
Likes: 225
Default

Sorry, they say they're still processing it.
Reply
Old Oct 20, 2021 | 08:36 PM
  #7  
tknospdr's Avatar
tknospdr
Thread Starter
Pro
 
Joined: Oct 2020
Posts: 503
Likes: 139
Default

2 minutes left...
Reply
Old Oct 20, 2021 | 08:39 PM
  #8  
tknospdr's Avatar
tknospdr
Thread Starter
Pro
 
Joined: Oct 2020
Posts: 503
Likes: 139
Default

Well...

"Video processing is taking longer than expected. Hold tight."
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-1

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-2

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-3

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
story-4

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

 Joe Kucinski
story-5

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-6

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-7

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-8

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-9

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
Old Oct 20, 2021 | 08:40 PM
  #9  
tknospdr's Avatar
tknospdr
Thread Starter
Pro
 
Joined: Oct 2020
Posts: 503
Likes: 139
Default

There we go!
Reply
Old Oct 20, 2021 | 08:46 PM
  #10  
Mrvettenick's Avatar
Mrvettenick
Drifting
All Eyes On Me
Liked
 
Joined: Aug 2019
Posts: 1,339
Likes: 225
Default

Does it start right back up? And if it starts how does it run?
Reply
Old Oct 21, 2021 | 07:31 AM
  #11  
tknospdr's Avatar
tknospdr
Thread Starter
Pro
 
Joined: Oct 2020
Posts: 503
Likes: 139
Default

It started 3 times, but after the 2nd it was bucking really bad, That's why I pulled over and had it towed.
Again I say, I don't know anything about the mechanics of cars. Even if I was looking at the carb I'd have no idea if the choke was open and don't know what "fuel running down it's throat" would look like.
Reply
Old Oct 21, 2021 | 07:34 AM
  #12  
Mr D.'s Avatar
Mr D.
Team Owner
Supporting Lifetime Gold
20 Year Member
Veteran: Navy
Community Builder
Liked
 
Joined: Mar 2002
Posts: 44,681
Likes: 1,830
From: Huntsville AL
Default

Originally Posted by tknospdr
It started 3 times, but after the 2nd it was bucking really bad, That's why I pulled over and had it towed.
Again I say, I don't know anything about the mechanics of cars. Even if I was looking at the carb I'd have no idea if the choke was open and don't know what "fuel running down it's throat" would look like.
Now have the car towed to a mechanic so he can fix it.
Reply
Old Oct 21, 2021 | 08:01 AM
  #13  
tknospdr's Avatar
tknospdr
Thread Starter
Pro
 
Joined: Oct 2020
Posts: 503
Likes: 139
Default

Originally Posted by Mr D.
Now have the car towed to a mechanic so he can fix it.
Why didn't I think of that?
I was just going to have it towed home and hit the engine with a hammer.
Reply
Old Oct 21, 2021 | 10:30 AM
  #14  
71 Green 454's Avatar
71 Green 454
Le Mans Master
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2006
Posts: 6,400
Likes: 1,226
From: Tampa Florida
Default

Originally Posted by tknospdr
It started 3 times, but after the 2nd it was bucking really bad, That's why I pulled over and had it towed.
Again I say, I don't know anything about the mechanics of cars. Even if I was looking at the carb I'd have no idea if the choke was open and don't know what "fuel running down it's throat" would look like.
Choke open:



Choke closed:



"Fuel running down its throat"...about 42 years ago my '71 was running rich and I could smell gas. A high school kid around the corner from me stopped by to see what I was doing. I told him that I could see gas pouring down into the carburetor. One glance and he said "your float has sunk". So I went to NAPA and bought a new float, he removed the top of the carburetor, installed the new float, and problem resolved.

Last edited by 71 Green 454; Oct 21, 2021 at 10:38 AM.
Reply
Old Oct 21, 2021 | 11:03 AM
  #15  
calwldlife's Avatar
calwldlife
Team Owner
15 Year Member
Loved
Community Favorite
Top Answer: 1
 
Joined: Jan 2007
Posts: 53,648
Likes: 878
From: Southern Cal Ca
St. Jude Donor '22
Default

Originally Posted by tknospdr
It started 3 times, but after the 2nd it was bucking really bad, That's why I pulled over and had it towed.
Again I say, I don't know anything about the mechanics of cars. Even if I was looking at the carb I'd have no idea if the choke was open and don't know what "fuel running down it's throat" would look like.
I have been curious about this kind of thing.
What king of info are you looking for?
Do you have a particular member you think will tell you what is going on?
If a member did tell you what it is and what to do, then what?

It could be a few things.
Some symptoms point to fuel and float.
The instant off could be electrical.

Your vid doesn't sound right in the respect that when you let off the throttle, the engine doesn't sound like it immediately snaps to idle, there is more of a "cush" to idle. no "snap" more of a settle.
Reply
Old Oct 21, 2021 | 11:25 AM
  #16  
Mrvettenick's Avatar
Mrvettenick
Drifting
All Eyes On Me
Liked
 
Joined: Aug 2019
Posts: 1,339
Likes: 225
Default

Just trying to establish if you're losing spark, or it's flooding. Does it act up when fully warm, or is the engine cold? When you restart it does smoke come out of the exhaust? Have you looked at the spark plugs?
Reply
Old Oct 21, 2021 | 03:50 PM
  #17  
tknospdr's Avatar
tknospdr
Thread Starter
Pro
 
Joined: Oct 2020
Posts: 503
Likes: 139
Default

Originally Posted by 71 Green 454
Choke open:



Choke closed:



"Fuel running down its throat"...about 42 years ago my '71 was running rich and I could smell gas. A high school kid around the corner from me stopped by to see what I was doing. I told him that I could see gas pouring down into the carburetor. One glance and he said "your float has sunk". So I went to NAPA and bought a new float, he removed the top of the carburetor, installed the new float, and problem resolved.
Thanks for the pics, so it's choke was open when I looked at it in the afternoon while waiting for the tow truck to arrive, not sure what condition it was in right after I pulled over.

Originally Posted by calwldlife
I have been curious about this kind of thing.
What king of info are you looking for?
Do you have a particular member you think will tell you what is going on?
If a member did tell you what it is and what to do, then what?

It could be a few things.
Some symptoms point to fuel and float.
The instant off could be electrical.

Your vid doesn't sound right in the respect that when you let off the throttle, the engine doesn't sound like it immediately snaps to idle, there is more of a "cush" to idle. no "snap" more of a settle.
I'm just looking for input. I'm not unwilling to learn, you just have to understand that I'm starting from scratch so if you offer advice it needs to be from point A to B to C. If you start assuming I already know the A to B part I'm already lost.

Originally Posted by Mrvettenick
Just trying to establish if you're losing spark, or it's flooding. Does it act up when fully warm, or is the engine cold? When you restart it does smoke come out of the exhaust? Have you looked at the spark plugs?
It was cold in the morning when I made it about 3 miles before the first time it died, then after that was maybe a mile, then .5 miles to the final time.
Shop said it started right up for them again the next morning so, I'm guessing it acts up when warm. Didn't notice smoke, but I was in traffic so I wasn't paying attention. Just trying to get her going so I wasn't pissing off morning commuters.

Called the shop today for an update. They said my points were burnt and 4 of 8 plugs were gas fouled but they haven't had a chance to run it up to temp to test it since they replaced the parts. They're going to call with an update tomorrow.
Reply

Get notified of new replies

To Dying at idle

Old Oct 21, 2021 | 05:29 PM
  #18  
Mrvettenick's Avatar
Mrvettenick
Drifting
All Eyes On Me
Liked
 
Joined: Aug 2019
Posts: 1,339
Likes: 225
Default

So it sounds like you had intermittent spark. Worn points will do that.
Reply
Old Oct 21, 2021 | 05:32 PM
  #19  
tknospdr's Avatar
tknospdr
Thread Starter
Pro
 
Joined: Oct 2020
Posts: 503
Likes: 139
Default

I really hope that's all it is. I feel like I've invested enough into the car, at least for a little while.
Reply
Old Oct 21, 2021 | 06:24 PM
  #20  
calwldlife's Avatar
calwldlife
Team Owner
15 Year Member
Loved
Community Favorite
Top Answer: 1
 
Joined: Jan 2007
Posts: 53,648
Likes: 878
From: Southern Cal Ca
St. Jude Donor '22
Default

Congrats on the big block and I wish you luck in learning your car/

A few must have tools beyond wrenches would be;
timing light
Dwell meter with ohs and dc volts digital multimeter
A vacuum gauge with a pump handle to apply vacuum.

many skilled and experienced guys here to help out.
But you need to be able to test and explain what you have found.

burnt points sound like a bad condenser.
condenser works with points and coil to allow good hot spark.

you are lucky in that all info and actual videos guiding you are available.

I remember well when a trip to the public library was a need and books listed the correct parts and specs.

The more you learn, the better the car will run and no high cost mechanic visits will be needed.

A factory service manual, if you can find one, is invaluable for trouble shooting and step by step procedures.

The more info you supply here when asking for advice about an issue the more success you will have.

Read everyone's responses, don't fall into a trap of only trusting one person.

good luck



Reply



All times are GMT -4. The time now is 04:01 PM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE