Gain extra benefits by becoming a Supporting Member Click here find out how!

Classic Performance Products Classic Parts
American Auto Wire Classic Industries
Danchuk Catalog
Hellwig Products IncPerformance Rod & CustomNu-Relics Power Windows



Username Post: Hard starting when warm        (Topic#357861)
palo 
Member
Posts: 99

Loc: fresno ca.
Reg: 05-28-05
08-29-19 12:11 PM - Post#2774419    

I have a 1956 chevy belair with a 283 cid when cold starting it starts pretty easily , but after riding for let's say a half an hour it becomes harder to start ,it has to crank longer with a lot of gas pedal pumping.why is it when it's warm it's harder to start?
Thank you.



 


pauldian 
Contributor
Posts: 286
pauldian
Loc: seligman,arizona
Reg: 05-14-09
08-29-19 01:39 PM - Post#2774426    
    In response to palo

Most likely it's vapor locking. Nothing new with
ethanol.



 
palo 
Member
Posts: 99

Loc: fresno ca.
Reg: 05-28-05
08-30-19 12:23 AM - Post#2774455    
    In response to pauldian

Could be thanks.



 
apix17 
Contributor
Posts: 141

Loc: San Francisco Area
Reg: 12-22-07
08-30-19 11:42 AM - Post#2774496    
    In response to palo

I had the same problem with my 55 Belair with a 327 and Edlebrock Performer series 4 barrel carb. Started great when cold but hard to start when hot. I also noticed when sitting a while after being shut off when hot I could smell fuel but no leak anywhere. I figured the fuel might be percolating in carb due to heat so I installed a heat insulator between carb and manifold, sold by Edlebrock, and it solved the problem. No fuel smell and starts right up hot. Good luck, keep us posted.



 
palo 
Member
Posts: 99

Loc: fresno ca.
Reg: 05-28-05
08-31-19 07:29 PM - Post#2774595    
    In response to apix17

Thanks for the info .



 
56sedandelivery 
Dedicated Member
Posts: 5692
56sedandelivery
Age: 68
Loc: Everett, Wa.
Reg: 02-26-08
08-31-19 08:59 PM - Post#2774600    
    In response to palo

IF, it involves an extended, period of slow cranking, the starter motor may be getting hot. heat equates to resistance in the field windings of the starter motor, making for a hard start situation. Isolating the starter with shielding, a "better" battery, or making a better ground may all help. Are't these old cars fun?
I am Butch/56sedandelivery.




 
Bruces 57 
Frequent Contributor
Posts: 2420

Reg: 01-03-07
09-01-19 07:51 AM - Post#2774619    
    In response to 56sedandelivery

Hello;
Well, My cure took a couple years but be advised that each thing you do makes it better and better.
First I tried the carb insulator, It helped but I still had fuel boiling in my Ebrock Carb, (4 barrel) I also added a fuel pressure regulator. Then, just because of failures and problems with the distributor I went ahead and had Dave's Small Body HEI re do my dist.! That Made it start quicker with less cranking! Runs much better too!
One of the last things was a carb change to a street deamon with a composite fuel bowl!! ($300) That made it start right up, Just give her a pump and away you go!!
All of these things I did took time to diagnose and find a "real" cure for each problem, not to mention all the "rebuilt starters" I had fail!!!
Ended up with a mini high torque from Powermaster have not had a problem since!!!
The real thing to do is carefully check each part of the "starting system" and make "educated" fixes, Including checking the wiring going to the starter and adding a Heat shield to the wiring as well as the starter! ( To hold the shield on the starter I went to Home Depot and got a couple large hose clamps from the plumbing Dept.) You might ad a bigger wire also to the starter!


Bruce




 
palo 
Member
Posts: 99

Loc: fresno ca.
Reg: 05-28-05
09-04-19 09:48 PM - Post#2774855    
    In response to Bruces 57

Update i put in a powermaster starter since i wanted to upgrade starter anyway.
i added a optima 35 cca 720 new battery.
an Edelbrock Heat Insulator Gasket for Divided 4150 Square-bore.
i cleaned the cables and sanded behind the ground cable for good ground.
i adjusted the carb air fuel mixture .and the starter is not close to the ram exhauste manifold.
The results are the engine crank fast but after it's hot it cranks for about five seconds and i have to pump the gas for it to start.it starts quick when cold but has to crank alot to start hot.



Edited by palo on 09-04-19 09:49 PM. Reason for edit: No reason given.

 
palo 
Member
Posts: 99

Loc: fresno ca.
Reg: 05-28-05
09-04-19 09:50 PM - Post#2774856    
    In response to palo

the carb is about 7 years old edelbrock 500 electric choke model



 
palo 
Member
Posts: 99

Loc: fresno ca.
Reg: 05-28-05
09-04-19 09:52 PM - Post#2774857    
    In response to palo

oh yeah the heat insulator is 0.320" Thick
but car runs slightly rough when warmed up.
i also changed the spark plugs and gapped them
i changed the distributor cap and rotor
theirs no points i have pertronix in place of points.



Edited by palo on 09-04-19 09:55 PM. Reason for edit: No reason given.

 
palo 
Member
Posts: 99

Loc: fresno ca.
Reg: 05-28-05
09-12-19 07:43 PM - Post#2775432    
    In response to palo

i put a new spark plug wire set.
next i'll run it.
tommorrow i have to do some errands so i'll get to test the car out.



 
Bruces 57 
Frequent Contributor
Posts: 2420

Reg: 01-03-07
09-19-19 07:22 AM - Post#2775881    
    In response to palo

Hello;
Let me say this about that!
I've been through all of this with my 57! Every little thing I did, including adding additional parts, Doing heat shields on the carb, adjusting timing, adding heat insulation on my wiring to the starter, and having my distributor made into an HEI! did not work as well as replacing my 1406 Edelbrock with a Street Deamon carb with the composite fuel bowl! ($300) Starts right up fast!! EVERYTIME!!!! Runs way better!!!!!
The problem was that the carburetor would boil all the crappy Ethanol gas right at 180 degrees!! Which is engine operating temp! Lets face it, when these cars were made there wasn't any gas like ethanol!!
You could source a gas station that has gas without ethanol (boat gas) pay that price to gas up there! It's hard to find in California!

Bruce



 


Icon Legend Permissions Topic Options
Report Post

Quote Post

Quick Reply

Print Topic

Email Topic

508 Views
FusionBB
FusionBB™ Version 2.1
©2003-2006 InteractivePHP, Inc.
Execution time: 0.116 seconds.   Total Queries: 16   Zlib Compression is on.
All times are (GMT -0800) Pacific. Current time is 03:42 PM
Top