C1 & C2 Corvettes General C1 Corvette & C2 Corvette Discussion, Technical Info, Performance Upgrades, Project Builds, Restorations

66 SB hard to start when sitting for a month or so...any ideas why

Thread Tools
 
Search this Thread
 
Old 01-05-2013, 08:13 PM
  #1  
rwerth7
Racer
Thread Starter
 
rwerth7's Avatar
 
Member Since: Feb 2010
Posts: 352
Likes: 0
Received 7 Likes on 7 Posts
Default 66 SB hard to start when sitting for a month or so...any ideas why

After the car has been sitting for a month or so I have to pump the gas peddle 20 to 30 times to get it to start. Runs fine once it is started. From then on starts right up hot or cold.

1) Carburetor bowls are not empty as I can see gas being squirted into the carb if I manually move the linkage back and forth (before I pump the gas peddle 20 to 30 times).

2) Choke plate closes after initial gas peddle pump

3) Carb has been rebuilt
4) Fuel pump replaced
5) Pertronix electronic ignition with new coil
6) Engine burns a little oil but nothing signifcant but there is an oily residue on the spark plugs
7) Spark plugs and wires replaced. Problem continues.

Any ideas?

Could the oil residue on the spark plugs prevent car from starting until gas "washes" them clean?

I'm stumped. Thanks in advance for any suggestions.

Ron
Old 01-05-2013, 08:53 PM
  #2  
Lou64
Burning Brakes
 
Lou64's Avatar
 
Member Since: Jun 2010
Location: Louisville KY
Posts: 940
Received 2 Likes on 2 Posts
Default

Could be water in your fuel? Try some fuel stabilizer and see if it corrects the problem, and keep the tank full when it sits.
Old 01-05-2013, 09:41 PM
  #3  
midyearvette
Le Mans Master
Support Corvetteforum!
 
midyearvette's Avatar
 
Member Since: Nov 2008
Location: columbus oh
Posts: 5,691
Likes: 0
Received 11 Likes on 11 Posts
Default

Originally Posted by rwerth7
After the car has been sitting for a month or so I have to pump the gas peddle 20 to 30 times to get it to start. Runs fine once it is started. From then on starts right up hot or cold.

1) Carburetor bowls are not empty as I can see gas being squirted into the carb if I manually move the linkage back and forth (before I pump the gas peddle 20 to 30 times).

2) Choke plate closes after initial gas peddle pump

3) Carb has been rebuilt
4) Fuel pump replaced
5) Pertronix electronic ignition with new coil
6) Engine burns a little oil but nothing signifcant but there is an oily residue on the spark plugs
7) Spark plugs and wires replaced. Problem continues.

Any ideas?

Could the oil residue on the spark plugs prevent car from starting until gas "washes" them clean?

I'm stumped. Thanks in advance for any suggestions.

Ron
if everything you state is correct, and i assume it is, i would set the choke plate a little richer. it should slam shut and stay there until she fires when the pulloff comes in to play.
if indeed the choke is working properly, i would check for fire, in fact why don't you check for fire first the next time this happens.....good luck
Old 01-06-2013, 12:11 AM
  #4  
rwerth7
Racer
Thread Starter
 
rwerth7's Avatar
 
Member Since: Feb 2010
Posts: 352
Likes: 0
Received 7 Likes on 7 Posts
Default

Originally Posted by midyearvette
if everything you state is correct, and i assume it is, i would set the choke plate a little richer. it should slam shut and stay there until she fires when the pulloff comes in to play.
if indeed the choke is working properly, i would check for fire, in fact why don't you check for fire first the next time this happens.....good luck
When u say check for fire do you mean to check if the spark plugs fire?

Thanks
Old 01-06-2013, 06:32 AM
  #5  
MikeM
Team Owner
 
MikeM's Avatar
 
Member Since: Mar 2003
Location: Greenville, Indiana
Posts: 26,118
Received 1,843 Likes on 1,398 Posts

Default

I'll take your word for it the carb is shooting "something" when you first pump the gas. I'll also bet what it's shooting won't fire in the cylinder.

Next time you let the car sit for a month, drop a tablespoon full of fresh gas down the primary throat of the carb and see if it doesn't kick right off.
Old 01-06-2013, 07:29 AM
  #6  
midyearvette
Le Mans Master
Support Corvetteforum!
 
midyearvette's Avatar
 
Member Since: Nov 2008
Location: columbus oh
Posts: 5,691
Likes: 0
Received 11 Likes on 11 Posts
Default

Originally Posted by rwerth7
When u say check for fire do you mean to check if the spark plugs fire?

Thanks
yes...sorry
Old 01-06-2013, 07:57 AM
  #7  
corvetteed
Team Owner

 
corvetteed's Avatar
 
Member Since: Mar 2003
Location: Wilmington N C
Posts: 24,362
Received 363 Likes on 250 Posts
St. Jude Donor '14-'15-'16-'17-'18-'19-'20-'21-'22-'23-'24


Default

Originally Posted by MikeM
I'll take your word for it the carb is shooting "something" when you first pump the gas. I'll also bet what it's shooting won't fire in the cylinder.

Next time you let the car sit for a month, drop a tablespoon full of fresh gas down the primary throat of the carb and see if it doesn't kick right off.
I do what he said; except, I just go ahead and use starter fluid, instead of dropping gas down the carb.
Old 01-06-2013, 09:10 AM
  #8  
Matt Gruber
Race Director
 
Matt Gruber's Avatar
 
Member Since: Oct 2000
Location: New Smyrna Beach, FL
Posts: 12,898
Received 75 Likes on 51 Posts

Default

the light ends evaporate.
start it every 2 weeks. mark it on your calander. that's what i do.
or do what mikem says, give it fresh gas.
Old 01-06-2013, 10:19 AM
  #9  
gilbybarr
Le Mans Master
 
gilbybarr's Avatar
 
Member Since: Jul 2000
Posts: 5,190
Received 1,888 Likes on 795 Posts

Default

My '65 and the '63 Avanti are the same when sitting more than a week or so.....a bit of gas dropped in the carb will help it kick off without endless cranking.
Old 01-06-2013, 10:35 AM
  #10  
toms silver 60
Melting Slicks
 
toms silver 60's Avatar
 
Member Since: Oct 2004
Location: Lakeland FL
Posts: 2,726
Received 92 Likes on 62 Posts

Default

You can dribble gas into the carb by pouring it on top of air cleaner stud/screw, it will save having to remove lid. Plus minimize any backfires ....
Old 01-06-2013, 10:07 PM
  #11  
JohnZ
Team Owner

Support Corvetteforum!
 
JohnZ's Avatar
 
Member Since: Oct 2000
Location: Washington Michigan
Posts: 38,899
Received 1,857 Likes on 1,100 Posts

Default

When mine sits that long, I use a plastic ketchup dispenser bottle - the nozzle is just right for fitting into the bowl vent tube; about 1/3 of a bottle fills the float bowl, and it fires right up without all the cranking.
Attached Images  
Old 01-06-2013, 10:11 PM
  #12  
65hihp
Le Mans Master
 
65hihp's Avatar
 
Member Since: Mar 2009
Location: Cold Harbor, VA
Posts: 7,287
Received 3,268 Likes on 1,689 Posts

Default

John
your wife is OK with using the bottle for that? Maybe that occasional 1/3 fill with gas adds a little kick to the ketchup?
Old 01-06-2013, 10:13 PM
  #13  
Hitch
Race Director

 
Hitch's Avatar
 
Member Since: Jul 2002
Location: Clayton NC
Posts: 11,593
Received 164 Likes on 109 Posts

Default

Originally Posted by JohnZ
When mine sits that long, I use a plastic ketchup dispenser bottle - the nozzle is just right for fitting into the bowl vent tube; about 1/3 of a bottle fills the float bowl, and it fires right up without all the cranking.
I've tried bottles like that and the gas usually eats through them so I bought one from Jeg's that seems impervious to fuel..
Old 01-06-2013, 10:30 PM
  #14  
JohnZ
Team Owner

Support Corvetteforum!
 
JohnZ's Avatar
 
Member Since: Oct 2000
Location: Washington Michigan
Posts: 38,899
Received 1,857 Likes on 1,100 Posts

Default

Originally Posted by 65hihp
John
your wife is OK with using the bottle for that? Maybe that occasional 1/3 fill with gas adds a little kick to the ketchup?
No, and I don't use her turkey baster to suck brake fluid out of master cylinders either - I have my own.
Old 01-06-2013, 11:19 PM
  #15  
Fawndeuce
Safety Car
 
Fawndeuce's Avatar
 
Member Since: Aug 2006
Location: Location, Location QC,NY
Posts: 3,547
Received 35 Likes on 29 Posts

Default

Originally Posted by JohnZ
No, and I don't use her turkey baster to suck brake fluid out of master cylinders either - I have my own.
So I'm in the dollar store and I put two turkey basters in my hand basket, one of those salad dressing squeeze bottles and aluminum foil that I use for masking when painting under the hood.
This elderly woman then says to me "So nice to see a man who likes to cook" , I didn't have the heart to tell her.



Paul
Old 01-07-2013, 07:58 AM
  #16  
MikeM
Team Owner
 
MikeM's Avatar
 
Member Since: Mar 2003
Location: Greenville, Indiana
Posts: 26,118
Received 1,843 Likes on 1,398 Posts

Default

If a shot of fresh gas makes your engine fire right off, I think you could make the assumption that you just need to fill the fuel bowl with fresh gas from the fuel pump.

I never did see any sense in raising the hood, taking the air cleaner lif off, squirting gas in the carb and getting your hands all stinky and then putting everything back together, washing your hands and the starting the car.

It's much simpler to just crank the engine for about 5-6 seconds, stop cranking and fan the gas a few times and then crank it again and it starts/runs.

Besides, everytime you pull that hood release, you're just one pull closer to having the cable break and then you'll be on your back trying to trip the hood latches with a broom stick.
Old 01-07-2013, 08:03 AM
  #17  
Hitch
Race Director

 
Hitch's Avatar
 
Member Since: Jul 2002
Location: Clayton NC
Posts: 11,593
Received 164 Likes on 109 Posts

Default

Originally Posted by MikeM
If a shot of fresh gas makes your engine fire right off, I think you could make the assumption that you just need to fill the fuel bowl with fresh gas from the fuel pump.

I never did see any sense in raising the hood, taking the air cleaner lif off, squirting gas in the carb and getting your hands all stinky and then putting everything back together, washing your hands and the starting the car.

It's much simpler to just crank the engine for about 5-6 seconds, stop cranking and fan the gas a few times and then crank it again and it starts/runs.

Besides, everytime you pull that hood release, you're just one pull closer to having the cable break and then you'll be on your back trying to trip the hood latches with a broom stick.
Okay who is logged into Mike's account?
Old 01-07-2013, 10:53 AM
  #18  
DansYellow66
Race Director
Support Corvetteforum!
 
DansYellow66's Avatar
 
Member Since: Jan 2003
Location: Central Arkansas
Posts: 15,756
Received 2,620 Likes on 1,952 Posts

Default

Originally Posted by JohnZ
When mine sits that long, I use a plastic ketchup dispenser bottle - the nozzle is just right for fitting into the bowl vent tube; about 1/3 of a bottle fills the float bowl, and it fires right up without all the cranking.
I do the same thing. Works great on Holleys. I found JEGs even sells a plastic priming bottle specifically for this.
Old 01-07-2013, 11:16 AM
  #19  
Matt Gruber
Race Director
 
Matt Gruber's Avatar
 
Member Since: Oct 2000
Location: New Smyrna Beach, FL
Posts: 12,898
Received 75 Likes on 51 Posts

Default

on my 61 i have a prime button under the dash(for the electric fuel pump). turn key on, press for 2 sec, turn to start, pump twice, instantly starts.
so if 2 weeks go by, and i don't drive it, i just prime it to keep fresh gas in the carb. otherwise it might, on rare ocasion, dry out and leave flakes in the carb. and clog it.

Get notified of new replies

To 66 SB hard to start when sitting for a month or so...any ideas why




Quick Reply: 66 SB hard to start when sitting for a month or so...any ideas why



All times are GMT -4. The time now is 02:28 AM.