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04-16-2020, 05:00 PM
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#1 |
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Registered User
Join Date: Feb 2019
Location: Strawberry plains, TN
Posts: 5
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My 70 won't start
My 70 C10 wont start.
new plugs, cap, rotor, wires, coil, points and condenser. I put her in the garage to rebuild the carburetor. Now, no spark. the points are at .030, the positive side of the coil reads 5.7 vdc the negative side is zero. The run terminal on the starter solenoid reads 5.8 vdc I use the black side of my jumper cables to reference ground and clamp it to a spark plug to look for spark. I can lay the plug on the cowl to watch for spark, since I have no help. Any ideas? |
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04-16-2020, 05:22 PM
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#2 |
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Post Whore
 
Join Date: Feb 2016
Location: Portland Oregon
Posts: 11,351
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Re: My 70 won't start
Just for clarification, the truck ran with the new plugs, wires, and points when you drove it into the garage? Then you removed the carburetor, rebuilt it, reinstalled it and now you have no spark?
And Welcome Aboard. We would all love to see pictures of your truck.
__________________
Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help.  RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 |
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04-16-2020, 05:33 PM
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#3 |
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Registered User
Join Date: Feb 2019
Location: Strawberry plains, TN
Posts: 5
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Re: My 70 won't start
While I had the carburetor off, I reworked the ignition system. And now it won't start.
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04-16-2020, 05:38 PM
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#4 |
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Just here to tinker
Join Date: Jun 2008
Location: Holland, MI
Posts: 3,697
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Re: My 70 won't start
That voltage is way too low. What is your battery voltage at the terminals? Sounds like you have a dead battery.
__________________
78 C10 SWB Diesel #1 (wrecked)http://67-72chevytrucks.com/vboard/s...1978+silverado 78 C10 SWB Diesel #2 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=650751 60 GMC Suburban (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=445526 60 GMC 1000 (sold)http://67-72chevytrucks.com/vboard/showthread.php?t=298235 67 GMC 1500 (sold) http://67-72chevytrucks.com/vboard/s...d.php?t=803695 73 Chevy C20(Daily)http://67-72chevytrucks.com/vboard/s...d.php?t=852767 86 Suburban(summer unit) http://67-72chevytrucks.com/vboard/s...d.php?t=810697 88 Suburban 4x4(sold) |
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04-16-2020, 05:48 PM
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#5 |
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Registered User
Join Date: Feb 2019
Location: Strawberry plains, TN
Posts: 5
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Re: My 70 won't start
The voltage at the battery is 12.28
It cranks very nice. No struggle at all. But I have zero spark, not even a weak one. I'm sort of thinking it has something to do with my ignition switch. I'm still looking for a pin out on the switch so I can check it |
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04-16-2020, 05:50 PM
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#6 |
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Post Whore
Join Date: Feb 2016
Location: Portland Oregon
Posts: 11,351
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Re: My 70 won't start
What is the battery voltage when the starter is cranking?
How did you measure the voltage at the coil?
__________________
Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 |
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04-16-2020, 05:49 PM
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#7 |
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Registered User
Join Date: Mar 2005
Location: Jurupa Valley, Ca
Posts: 1,210
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Re: My 70 won't start
That voltage may be correct if the points are closed. Take the dist cap off and make sure you have a gap of about .019 when the heal of the points are on the high ridge of the rotor assembly. that should get you real close. also make sure you didn't short the points to ground with the condenser. If you watch the points while cranking they should open and then close. .030 is too big.
__________________
Terry 1970 Custom Camper/C20 , GM Crate 350/7004R, Dana 60, factory AC |
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04-17-2020, 09:39 PM
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#8 |
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Post Whore
Join Date: Feb 2016
Location: Portland Oregon
Posts: 11,351
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Re: My 70 won't start
Good work! And thanks for posting your success.
__________________
Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 |
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