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05-24-2015, 01:14 PM
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#1 |
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Registered User
Join Date: Jul 2014
Location: Ellerslie,Ga
Posts: 5
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1972 C10 Cheyenne
Hello!,
I have a 1972 C10 Cheyenne Long Bed with the V8 350 CID engine. I am having trouble starting it after it has been running for a little while. It starts up fine for the initial start and if I drive it around and then park for say 5-10 mins and come back to try and restart it I am having an issue with restart. It sounds like the starter is hard to turn. I have replaced the starter, solenoid, starting coil and the battery is holding a charge just fine. If I wait 30 mins and come back it will start right back up again with no issues. I am a information security geek as my day trade and I have a mechanical engineering background but I am far from being a decent mechanic! I can read schematics and troubleshoot via google so you wont hurt my feelings if I have done something wrong or I am missing something silly! I really appreciate this forum because it has really helped me with this old truck! Thanks in advance for your help! |
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05-24-2015, 02:00 PM
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#2 |
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The Older Generation
   
Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,847
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Re: 1972 C10 Cheyenne
Welcome to the board!
- I would say it is one of two things. Gas is boiling in the carb float bowl or the starter and solenoid are suffering from heat soak. When the starter and solenoid get hot it degrades performance. I had the starter problem so I decided to get one of the mini starters so it would have more air space around the starter. I had no more hard starting problems after that. Usually with the gas boiling in the float bowl problem it will show up after setting and idling for a period of time and the temp rises. When you accelerate after setting at idle for a while the engine will run fine for a minute or so then start running really crappy and will not accelerate. It acts like it is starving for fuel, which it is. You can usually cure this problem by installing a 3/4 or 1" phenolic spacer under the carb. Just a couple of things to think about. LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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05-24-2015, 02:57 PM
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#3 |
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Born Psycho
Join Date: Feb 2001
Location: brentwood,cal,usa
Posts: 4,948
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Re: 1972 C10 Cheyenne
double check your battery connections-especially the battery to block ground.
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jerry moss 72 cheyenne super K20- tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,tow hooks,bumper guards,toolbox,aux. fuel tank,posi front and rear,plus other goodies!!! SOLD 69 suburban K20-tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,4 inch all spring lift,4 speed, 14 bolt full floater, dana 44 HD,warn winch,posi front and rear,tow hooks,plus other goodies. 73/80 chevy/gmc K20 SB400,turbo 400,205,tilt,a-c,gas hog. 77 K/5 cheyenne blazer-daily driver/beater. SON HAS IT NOW BRENTWOOD,CALIFORNIA |
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05-24-2015, 03:44 PM
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#4 |
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Registered User
Join Date: Jul 2014
Location: Ellerslie,Ga
Posts: 5
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Re: 1972 C10 Cheyenne
I just put a new starter on yesterday so I hope it is not heat soak but I can't rule it out. I don't have any issues with the engine running poorly so I think I can eliminate the fuel boiling in the bowl problem. Thank you so much for replying and offering your experience LockDoc!
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05-24-2015, 03:45 PM
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#5 |
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Registered User
Join Date: Jul 2014
Location: Ellerslie,Ga
Posts: 5
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Re: 1972 C10 Cheyenne
Jerry M,
Thanks for the suggestion. I am going to double check all of the wires related to starting. This truck needs a total wiring replacements. I just can break down and spend the bucks on the nice painless wiring harness. I have clean up a bunch of it but the right thing to do is to replace it all. Thanks for your advice I will report back my findings. |
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05-24-2015, 03:48 PM
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#6 |
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Senior Member
Join Date: Jan 2002
Location: Williston, ND
Posts: 2,999
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Re: 1972 C10 Cheyenne
Is this by chance an edelbrock carb?
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68 Chevy CST/10, 50th Anniversary, 327/th400, 373 posi, buckets 68 GMC Shortbox Stepside, 402/th400, Tilt, Tach, Bucket Seats, 3.08 Positraction 69 Chevy Camaro SS, 383, 4 speed, positraction 70 Chevy El Camino SS396, Triple Black, 454/th400, Tach 70 Chevy Shortbox Stepside 4x4, 350/th350, Tilt, Tach, Cab Lights, Bumper Guards, Tow Hooks 70 Chevy 3/4 Longbox, 350/auto, 70k, SURVIVOR 71 Chevy Blazer, CST, 350/auto 71 GMC Sierra K2500, 454, 4 speed, 4.10 posi, 37s 71 Custom/30, Open Road, 350/th400, tilt 72 Chevy Shortbox Fleetside, 496 Stroker/th400, Tilt, Tach, Bucket Seats, 3.42 Posi 72 GMC Sierra Grande 2500. 427/th400, tilt, a/c, tool and stowage, buckets/console, 3.54 posi |
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05-24-2015, 03:49 PM
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#7 |
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Registered User
Join Date: Jul 2014
Location: Ellerslie,Ga
Posts: 5
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Re: 1972 C10 Cheyenne
Yes Sir, It is.
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05-24-2015, 03:50 PM
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#8 |
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Senior Member
Join Date: Jan 2002
Location: Williston, ND
Posts: 2,999
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Re: 1972 C10 Cheyenne
Also do you have headers on your engine? What's your timing set at?
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68 Chevy CST/10, 50th Anniversary, 327/th400, 373 posi, buckets 68 GMC Shortbox Stepside, 402/th400, Tilt, Tach, Bucket Seats, 3.08 Positraction 69 Chevy Camaro SS, 383, 4 speed, positraction 70 Chevy El Camino SS396, Triple Black, 454/th400, Tach 70 Chevy Shortbox Stepside 4x4, 350/th350, Tilt, Tach, Cab Lights, Bumper Guards, Tow Hooks 70 Chevy 3/4 Longbox, 350/auto, 70k, SURVIVOR 71 Chevy Blazer, CST, 350/auto 71 GMC Sierra K2500, 454, 4 speed, 4.10 posi, 37s 71 Custom/30, Open Road, 350/th400, tilt 72 Chevy Shortbox Fleetside, 496 Stroker/th400, Tilt, Tach, Bucket Seats, 3.42 Posi 72 GMC Sierra Grande 2500. 427/th400, tilt, a/c, tool and stowage, buckets/console, 3.54 posi |
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05-24-2015, 03:51 PM
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#9 |
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Senior Member
Join Date: Jan 2002
Location: Williston, ND
Posts: 2,999
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Re: 1972 C10 Cheyenne
If you're not running a spacer under your carburetor its most likely having a fuel boiling issue. Does it start easier if you push the throttle all the way to the floor after the engine is warm?
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68 Chevy CST/10, 50th Anniversary, 327/th400, 373 posi, buckets 68 GMC Shortbox Stepside, 402/th400, Tilt, Tach, Bucket Seats, 3.08 Positraction 69 Chevy Camaro SS, 383, 4 speed, positraction 70 Chevy El Camino SS396, Triple Black, 454/th400, Tach 70 Chevy Shortbox Stepside 4x4, 350/th350, Tilt, Tach, Cab Lights, Bumper Guards, Tow Hooks 70 Chevy 3/4 Longbox, 350/auto, 70k, SURVIVOR 71 Chevy Blazer, CST, 350/auto 71 GMC Sierra K2500, 454, 4 speed, 4.10 posi, 37s 71 Custom/30, Open Road, 350/th400, tilt 72 Chevy Shortbox Fleetside, 496 Stroker/th400, Tilt, Tach, Bucket Seats, 3.42 Posi 72 GMC Sierra Grande 2500. 427/th400, tilt, a/c, tool and stowage, buckets/console, 3.54 posi |
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05-24-2015, 04:18 PM
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#10 |
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Registered User
Join Date: Jul 2014
Location: Ellerslie,Ga
Posts: 5
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Re: 1972 C10 Cheyenne
I will take some detail pictures to help determine if I have a spacer or not. When I try to restart it is acts like the starter is struggling to turn. I dropped a new battery in today since the old one was 5 years old. I will give it a test drive and report back later with the pictures.
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