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Username Post: Miss-fire after a hour or so of driving        (Topic#357960)
58beastbuilder 
Poster
Posts: 10
58beastbuilder
Loc: San Diego
Reg: 04-15-14
09-07-19 01:50 PM - Post#2775012    

I've had my 58 for 30 years now but it's finally got me. I've always done all my own work so I'm familiar with the car. I had a carb issue and rebuilt it. I still had trouble getting into the secondaries when the motor had been running for 1/2 an hour and found advancing the timing helped. But the pinging was very evident and on the way home this morning from a small trip sputtered and missed to the driveway and wouldn't start. Car cooled and started perfectly, ran okay. No points, I did the electronic conversion but can only think it might be the coil at this point. Doesn't make sense why only when hot and driven for more than 30 minutes.

1958 Corvette
1965 El Camino
1965 4x4 Truck


 




Mel Foye 
*VIP* Original Founding Member Group
Posts: 4972
Mel Foye
Reg: 09-29-00
09-07-19 09:35 PM - Post#2775028    
    In response to 58beastbuilder

If a wcfb is that weight free?
On timing what are the numbers?
Miss when hot, gas line too close to exhaust pipe?
Something electrical getting too hot?
Heat riser free?



 
58beastbuilder 
Poster
Posts: 10
58beastbuilder
Loc: San Diego
Reg: 04-15-14
09-08-19 03:22 PM - Post#2775063    
    In response to Mel Foye

Changed the capacitor, messed with timing but still have a back-fire under hard acceleration. I think I may have done something wrong on the Carb. Yes it is weighted which makes me wonder if I put something together incorrectly there. Maybe just getting too much gas.

Thanks for the suggestions

1958 Corvette
1965 El Camino
1965 4x4 Truck


 
Mel Foye 
*VIP* Original Founding Member Group
Posts: 4972
Mel Foye
Reg: 09-29-00
09-08-19 08:17 PM - Post#2775101    
    In response to 58beastbuilder

Seems to be a good time to break this into steps. Dialing the carb in should be done after getting the timing spot on.
Do you have a timing light? A dial back is best.
Vacuum line removed from vacuum advance and line plugged. As low of an rpm as the engine will run and what is the initial degrees?



 
58beastbuilder 
Poster
Posts: 10
58beastbuilder
Loc: San Diego
Reg: 04-15-14
09-09-19 08:02 AM - Post#2775132    
    In response to Mel Foye

Had a fiend look at it. He is an old gear head and is convinced it's the carb. I'll tear it down again and check.

1958 Corvette
1965 El Camino
1965 4x4 Truck


 
Mel Foye 
*VIP* Original Founding Member Group
Posts: 4972
Mel Foye
Reg: 09-29-00
09-09-19 05:32 PM - Post#2775188    
    In response to 58beastbuilder

Let us know the outcome. Mel



 
hdcolo 
Newbie
Posts: 16

Loc: Colorado
Reg: 08-04-17
07-06-20 05:17 PM - Post#2798070    
    In response to 58beastbuilder

. . Years ago I had a jerk customer who was always wanting free information. . Came in one day and asked how much to rebuild his carb. . The car would not get barely above an idle. . Gave him the price and did not hear from him again for a week when he came in asking how much to adjust his carb. . Gave him the price for that. . About the third time I asked if he wanted me to fix the car for $15. . He kept asking what I was going to do and I flat told him I couldn't tell him because he would go home and try to do it himself. . Finally he agreed, not to happy about it. . I popped the distributor cap and set his points that were damn near closed. . Took two minutes. . Car ran great but he was sure pissed. .



 
hdcolo 
Newbie
Posts: 16

Loc: Colorado
Reg: 08-04-17
07-09-20 05:28 PM - Post#2798302    
    In response to 58beastbuilder

. . Just to make sure, check the distributor shaft for side to side ply. . Older cars sometimes will have worn bushings in the housing. . Any side to side play will make your points adjustment impossible. .



 
TAT_2 
Member #26 "19th Year" Silver Supporting Member
Posts: 36671
TAT_2
Age: 67
Loc: "UNDER THE BOARDWALK"
Reg: 10-29-00
07-09-20 09:24 PM - Post#2798318    
    In response to hdcolo

HAD THE ADVANCE WEIGHTS STICK,WOULDNT DO IT ALL THE TIME THO.

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wagonmaster 
Member #241
Posts: 8964

Age: 71
Loc: Loganville, Ga.
Reg: 04-28-00
07-12-20 07:16 AM - Post#2798506    
    In response to TAT_2

Sounds like a bad or weak coil to me. Had one act like that on my'64. Swapped the coil on a hunch and never another issue.
Good luck!!

Hey T @!


In Memory of Mike McVeigh- The "Mad Spring Wacker" He roams the Forums of CT forever in our hearts and minds!

http://www.picturetrail.com/wagonmaster55

Joe


 
bobb 
Super Senior Member
Posts: 5694

Loc: paradise
Reg: 09-05-03
07-20-20 08:27 AM - Post#2799114    
    In response to wagonmaster

coil or ignition module can overheat and cause problems. a wet rag will cool them fast for testing.

70 L camino, grampa engine, g-force 5 spd, road rage suspension. Pray first before all else fails.


 




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