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

Still not running any ideas?

Thread Tools
 
Search this Thread
 
Old Jan 25, 2006 | 12:56 AM
  #1  
Bangkok Dean's Avatar
Bangkok Dean
Thread Starter
Le Mans Master
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2004
Posts: 8,295
Likes: 30
From: one night in Bangkok you are never lonely
Default Still not running any ideas?

Well I still can’t get it to run cold? First it is now difficult to start and when it does it barley idles like it stalls briefly then catches. Also it won’t take the gas stumbles bad. Then when it warms up it is fine?

Remember the temp out side is a cool 90 this time of year, and I never have used a choke to start.
Reply
Old Jan 25, 2006 | 03:14 AM
  #2  
IronJen's Avatar
IronJen
Abby Normal
Supporting Lifetime
20 Year Member
Veteran: Marine Corps
Community Builder
Liked
 
Joined: Dec 2001
Posts: 53,463
Likes: 92
From: Press "2" for English
Default

is it still pretty much stock?
Reply
Old Jan 25, 2006 | 06:28 AM
  #3  
fl_rider's Avatar
fl_rider
Drifting
 
Joined: Mar 2005
Posts: 1,806
Likes: 3
From: Burlington WI
Default

Good morning Dean,

Have you tried putting the old stock HEI back in?
Reply
Old Jan 25, 2006 | 06:33 AM
  #4  
SmokedTires's Avatar
SmokedTires
Le Mans Master
20 Year Member
 
Joined: Apr 2000
Posts: 7,562
Likes: 9
From: B'Ville NY
Cruise-In III Veteran
St. Jude Donor '05
Default

Have you pulled the spark plugs to have a look at them, maybe they're loaded up with carbon.
Reply
Old Jan 25, 2006 | 07:20 AM
  #5  
kb2fzq's Avatar
kb2fzq
Burning Brakes
 
Joined: Aug 2005
Posts: 1,126
Likes: 0
From: Hudson Falls, N.Y. 76 Vette Modified L-48
Default

Originally Posted by fl_rider
Good morning Dean,

Have you tried putting the old stock HEI back in?

I suggested this last go around...I stand by my opinion...
Reply
Old Jan 25, 2006 | 07:37 AM
  #6  
Bangkok Dean's Avatar
Bangkok Dean
Thread Starter
Le Mans Master
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2004
Posts: 8,295
Likes: 30
From: one night in Bangkok you are never lonely
Default

Originally Posted by kb2fzq

I suggested this last go around...I stand by my opinion...
That is a problem the car is an 81 computer distrubitor. Today I have done a few things including checking the plugs. The plugs look fine but I now beleve the problem is carboration as it does run fine when warm and I beleve if the current problem was the distributor it would be all the time cold and hot. Unfortunatly I cant check to see if I fixed anything till the morning when it is cold. It is now 7:35PM so I will let everone know tomorrow.

Thanks guys
Dean

Last edited by Bangkok Dean; Jan 25, 2006 at 07:44 AM.
Reply
Old Jan 25, 2006 | 08:19 AM
  #7  
kb2fzq's Avatar
kb2fzq
Burning Brakes
 
Joined: Aug 2005
Posts: 1,126
Likes: 0
From: Hudson Falls, N.Y. 76 Vette Modified L-48
Default

Hi Dean,
You've reported a ton of problems over the last couple weeks...I know when my toys don't work, I get very edgy....so, let me ask you...do you think the present problem relates to that distributor in any way??? I mean, did the crappy start-up just appear one morning? Have we adjusted the carbs at all??? My Vette used to be a bear to start when I first got it, but the chokes weren't hooked up...I'm running dual quad Edelbrocks...now it's an easy start..but I don't live in Bangkok either, today is a warm morning here...25 degrees F...almost freezing...
So, as I said, even though I'm running some after-market gear, I still get nervous when I hear people having problems with the A/M stuff installed on their cars...you are saying you don't have the stock HEI anymore?? My theory is, if you put it (stock HEI) back in on a temporary basis, and the car runs like it's brand new...well, the Summit has problems, I would say...I know it's a pain in the a$$, but it might be worth it to eliminate a potentially problematic equipment...with me being in the technical end of the world, elimination, one by one, is almost a necessity...just trying to help get ya back on the road running right...
Reply
Old Jan 25, 2006 | 11:57 AM
  #8  
Z-man's Avatar
Z-man
Race Director
25 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Nov 1999
Posts: 10,643
Likes: 8
From: Foxfield CO 1970 Convertible
Default

Originally Posted by Bangkok Dean
Remember the temp out side is a cool 90 this time of year, and I never have used a choke to start.
You're just lucky if you can start an engine when it is 90 without a choke. In the summer, it's often well over 100 here and you still need to use a choke on a "cold" engine. 90 degrees is "cold" when compared to 400-800 degree temperatures elsewhere in the engine.
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 Jan 25, 2006 | 12:38 PM
  #9  
Bangkok Dean's Avatar
Bangkok Dean
Thread Starter
Le Mans Master
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2004
Posts: 8,295
Likes: 30
From: one night in Bangkok you are never lonely
Default

At present I have only around 1,000 miles on my engine and have had several problems with my summit distributor. After 800 miles the module went out and at 900 miles I have now replaced two condensers in the distributor. The engine not shutting off I think is 1 low octane gas + high idle 900 rpm.
I have now added some STP octane buster and leave the AC on when turning off the engine.

Now the engine runs like crap when cold, and it won’t take the gas? Before the distributor started giving me problems it started good with out using the choke. Now it is difficult to start with or with out the choke.
When it warms up it runs ok and starts good.

Everything was replaced new 1,000 miles ago to no computer vacuum advance Summit distributor. The original I still have but it does not have the Vacuum advance.
Reply
Old Jan 25, 2006 | 12:55 PM
  #10  
zcorvette's Avatar
zcorvette
Advanced
15 Year Member
 
Joined: Apr 2005
Posts: 76
Likes: 0
From: League City TX
Default Didn't read the other thread, but...

Dean,

What's your base timing set at? What plug gap did you use? Vacuum leaks?

Peter
Reply
Old Jan 25, 2006 | 01:04 PM
  #11  
kb2fzq's Avatar
kb2fzq
Burning Brakes
 
Joined: Aug 2005
Posts: 1,126
Likes: 0
From: Hudson Falls, N.Y. 76 Vette Modified L-48
Default

1) My car (auto) idles about 1200 and shuts off fine, although I use 93 octane..even at 87 octane, it should not deisel...
2) Run-on or deiseling, from my experiences, is due to a timing problem, not a gas problem with octane, which brings us back to the distributor...again
3) Pardon my ignorance, what is Octane Buster...it adds octane? If so, is that a reason it runs like crap...you said it ran OK until you added this stuff...
And lastly) With you popping distributor condensers every 800 miles, it is clear most of your problems are distributor related....please swap back to the stock as a test
Reply
Old Jan 25, 2006 | 04:16 PM
  #12  
jdp6000's Avatar
jdp6000
Melting Slicks
10 Year Member
 
Joined: Jul 2005
Posts: 2,740
Likes: 3
From: Aurora Ontario
Default

If your computer is still connected. Its never going to run right without the proper parts to signal the computer. Your either using a computer or not using one...there is no 1/2 and 1/2.Its sounds like its not getting any information on start up. What else have you disconnected?

Jim

Jim
Reply
Old Jan 25, 2006 | 04:57 PM
  #13  
IronJen's Avatar
IronJen
Abby Normal
Supporting Lifetime
20 Year Member
Veteran: Marine Corps
Community Builder
Liked
 
Joined: Dec 2001
Posts: 53,463
Likes: 92
From: Press "2" for English
Default

Originally Posted by Bangkok Dean

Everything was replaced new 1,000 miles ago to no computer vacuum advance Summit distributor. The original I still have but it does not have the Vacuum advance.
forgive me for stepping in the middle of this conversation. i didn't catch if the carb was replaced also. did you post a thread with all the details?
when you say you've popped a couple condensors in the distributor already, are you talking about the modules? if so, did you put grease under them? are you sure the coil is right? there is a difference in the red/yellow wire coils and the red/white wire coils.
Reply
Old Jan 25, 2006 | 06:37 PM
  #14  
82X-FireVette's Avatar
82X-FireVette
Instructor
15 Year Member
 
Joined: Mar 2002
Posts: 144
Likes: 14
From: Central FL
Default

Dean, I have always admired your car in these posts. Its a nice clean ride. How fresh is your fuel? If it is quite old, it may be causing some problems. Another thought is that maybe the last batch of fuel was bad, but would have caused the car to run bad soon after the last fill up.
Reply
Old Jan 25, 2006 | 07:11 PM
  #15  
694speed350's Avatar
694speed350
Race Director
Veteran: Air Force
20 Year Member
Liked
Community Favorite
 
Joined: Sep 2005
Posts: 18,640
Likes: 121
From: Farragut,TN
Default

at 90 degrees seems like a choke is useless. I live in the se united states and since bubba saw fit to do away with the choke I dont have one on my 69 car will run ok with out the choke. don't rememer what model you have (senior moment) but if you have an adjusitbile carb you might want to richen it up a bit set it up with highest vacuum. our temps run here from below freezing to approximately 100.
Reply
Old Jan 26, 2006 | 06:37 AM
  #16  
Bangkok Dean's Avatar
Bangkok Dean
Thread Starter
Le Mans Master
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2004
Posts: 8,295
Likes: 30
From: one night in Bangkok you are never lonely
Default

Well I am now thinking it is the carburetor Edelbrock 600 cfm. At it is only bad when it is cold. I will take it apart when I can to see if the floats are stuck causing it to flood out when cold. Causing the up and down cold idle.

For those that asked there is no computer or anything left of the stock setup. It was running fine till the two condensers went out then the problems started


Reply
Old Jan 26, 2006 | 07:12 AM
  #17  
Jughead's Avatar
Jughead
Senior Member since 1492
Supporting Lifetime Gold
25 Year Member
Photogenic
Photoriffic
Liked
 
Joined: Aug 2000
Posts: 87,942
Likes: 156
From: Just because I'm paranoid doesn't mean people aren't out to get me...
St. Jude Donor '09
Default

I dumped my 1406 Dean. Never could get it to run right. Wouldn't hold an idle when warm.
Reply

Get notified of new replies

To Still not running any ideas?

Old Jan 26, 2006 | 11:02 AM
  #18  
Hvymtlc5's Avatar
Hvymtlc5
Melting Slicks
20 Year Member
Conversation Starter
All Eyes On Me
Top Answer: 1
 
Joined: Mar 2004
Posts: 3,472
Likes: 18
From: Lake Ozark, MO
Default

You think you could have got a bad batch (water) of gas?
Reply
Old Jan 26, 2006 | 12:43 PM
  #19  
Bangkok Dean's Avatar
Bangkok Dean
Thread Starter
Le Mans Master
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2004
Posts: 8,295
Likes: 30
From: one night in Bangkok you are never lonely
Default

Originally Posted by Hvymtlc5
You think you could have got a bad batch (water) of gas?
That ran threw my mind but why does it run OK when warm?

It was running fine till the two condensers went out then the problems started

Last edited by Bangkok Dean; Jan 26, 2006 at 12:45 PM.
Reply
Old Jan 27, 2006 | 07:17 AM
  #20  
Bangkok Dean's Avatar
Bangkok Dean
Thread Starter
Le Mans Master
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2004
Posts: 8,295
Likes: 30
From: one night in Bangkok you are never lonely
Default

Originally Posted by kb2fzq
1) My car (auto) idles about 1200 and shuts off fine, although I use 93 octane..even at 87 octane, it should not deisel...
2) Run-on or deiseling, from my experiences, is due to a timing problem, not a gas problem with octane, which brings us back to the distributor...again
3) Pardon my ignorance, what is Octane Booster...it adds octane? If so, is that a reason it runs like crap...you said it ran OK until you added this stuff...
And lastly) With you popping distributor condensers every 800 miles, it is clear most of your problems are distributor related....please swap back to the stock as a test
Thanks Bill for the suggestions you have made to problems I am having. First I don’t have the original distributor and even if I did it was a computer controlled distributor.
Here in Thailand there aren’t any parts like a distributor to buy so I would have to order one from the USA. You mentioned moisture this I have checked there is no moisture in the distributor cap. When I get time I will check the timing again but don’t see how that could change but it is something easy to check. You mentioned that timing could cause the condenser to go out and cause bigger engine problems?? I have not driven the car more that 5 miles since the problem with the condensers. I can drive the car if I try to keep it running till it warms up then it runs good, till it cools down.

Some have suggested that my problems could be in the carb? Boy I wish that was it but as I said it runs fine when it get warm. Maybe it is flooding out and that is why it is really difficult to start also.

But maybe the timing is really the problem too far advanced then when it warms up it is OK????

I will try to find time to work on it this weekend.

Thanks again for your suggestions and concern.
Reply



All times are GMT -4. The time now is 09:30 AM.

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