The Stovebolt Page Forums Home | FAQ | Forum | Swap Meet | Gallery | Tech Tips | Events | Features | Search | Hoo-Ya Shop
Helping out ...


EVENTS

Check in for status!

Jump over to the Events Forum, to post events -- new ones or the ones we have been enjoying for some time.
Look to see what's been cancelled or postponed.

Encourage one another!

Stovebolt Site Search
 
Old Truck Calendars
Months of truck photos!
Nothing like an old truck calendar

Stovebolt Calendars

Check for details!


Who's Online Now
11 members (moparguy, Johnny N, Hotrod Lincoln, Harold41, D B Cooper, elhippie64), 282 guests, and 3 robots.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums50
Topics121,474
Posts973,858
Members43,939
Most Online1,229
Jan 21st, 2020
Image Posting Policy
Previous Thread
Next Thread
Print Thread
63 gmc hard hot start
#1359682 Mon May 11 2020 12:17 AM
Joined: Mar 2019
Posts: 1,072
G
Shop Shark
1963 gmc 2500 series 305e stock everything except air cleaner. Ive checked, cleaned and adjusted sparkplugs to 035. Points set at 016, dwell at 30, timing at 10 btdc. Carb has been apart twice. Nice and clean, float set to spec. Runs smoothly. Cold start, pull choke, 2 pumps, fires right up. Push choke in 2/3rds. Let warma tad, choke in and drive. No problem. After driving abit, say half hour. Nice and hot, gauge at 165 or so. Let sit half hour and like clockwork. Hard start. Crank for ever then gets going but no chain of events. Tried with choke, no choke, pumps, no pumps. Cant get it figured out. At least not yet. Any suggestions?.?

Re: 63 gmc hard hot start
glenns towing #1359683 Mon May 11 2020 12:28 AM
Joined: Apr 2005
Posts: 9,118
Grease Monkey, Moderator General Truck Talk & Greasy Spoon
Try no choke and hold your accelerator to the floor.šŸ› 


Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)
ā€˜65 Chevy Biscayne 4dr 230 I-6 one owner (Iā€™m #2)
ā€˜39 Dodge Businessmans Coupe
USAF 1965-69 Weather Observation Tech (got paid to look at the clouds)


"I fought the law and the law won" now I are a retired one!
Support those brave men/women who stand the "Thin Blue Line"! Hug a cop!

Re: 63 gmc hard hot start
glenns towing #1359687 Mon May 11 2020 01:07 AM
Joined: Mar 2019
Posts: 1,072
G
Shop Shark
Thanks. Will try it and keep ya posted.

Re: 63 gmc hard hot start
glenns towing #1359718 Mon May 11 2020 02:46 AM
Joined: May 2005
Posts: 7,535
B
General Purpose
I think I read that when cold, it starts right up. I think I read when hot it Does start after much cranking.

Seems like; Loss of fuel flow, needs to regain. One quick way to find out something is carry a squirt bottle of gas. After heat up and no start, squirt some down carb, run back and start. If it fires right away, it's not electric or heat riser stuck.

So take off cap next. Next drive, take off gas cap.
Still won't start unless gas is squirted down carb? See 3 and 5.

1. Heat soak? Doubt it. That motor has supper cooling features. 165 is low.
2. Heat riser sticking? Yes could be heating/boiling gas from carb.
3. Fuel pump? Yes
4. Gas cap not venting? Yes
5. Rubber fuel hose collapse? Yes
6. Coil and/or condenser? Maybe

I have a 305E also.


Watch out for careful drivers!!!
I'm away on an ego trip. Will be back on Feb 30.
I'm not an Auto Mechanic, but I play one on TV.
I charge $0.02 for every opinion and I take Paypal.
Plan B is always better than plan A, by definition.
You can't teach a new dog old tricks.


Re: 63 gmc hard hot start
glenns towing #1359754 Mon May 11 2020 12:29 PM
Joined: Mar 2019
Posts: 1,072
G
Shop Shark
Thanks also. I was thinking coil also? I actually have a spare on the seat. Lol. Heat riser welded open. New fuel pump, all lines, tank, cap and filter. Not that something there isnt failing but somewhat unlikely. Ill try the cap and squirt bottle technique after i try WOT previously suggested. Ill keep ya posted.

Re: 63 gmc hard hot start
glenns towing #1359821 Mon May 11 2020 07:30 PM
Joined: May 2005
Posts: 7,535
B
General Purpose
thumbs_up


Watch out for careful drivers!!!
I'm away on an ego trip. Will be back on Feb 30.
I'm not an Auto Mechanic, but I play one on TV.
I charge $0.02 for every opinion and I take Paypal.
Plan B is always better than plan A, by definition.
You can't teach a new dog old tricks.


Re: 63 gmc hard hot start
glenns towing #1360098 Wed May 13 2020 01:13 PM
Joined: Sep 2019
Posts: 37
R
Wrench Fetcher
Hi,
Maybe you have a float bowl problem. Sounds like it's starving for gas after start up when already warm.

Either that or you float just needs to be adjusted.

Good luck

Re: 63 gmc hard hot start
glenns towing #1360652 Sun May 17 2020 01:21 AM
Joined: Mar 2019
Posts: 1,072
G
Shop Shark
Ok well heres what i got. Put about 100 miles on today. Not a hiccup. But it was warmer than ive ever driven the truck and it actually got to 175 degrees. Atad warmer than the previously 165, but all good. The other day i tried to get the same hard start effect but couldnt duplicate it. So i thought id be proactive and do something. I change the coil and cleaned the connections, which were needed. But was not the fix. After a heat soak, and attempted start. Nogo. I didnt do anything but hit the key, crank, no start. Stop crank, went to WOT, crank and started. Duplicated this act a couple times today. So i guess we have a winner. Thanks Justhorsenround. Not to mention all other input. If something else changes, ill update. But i think we nailed it.

Re: 63 gmc hard hot start
glenns towing #1360656 Sun May 17 2020 01:41 AM
Joined: Apr 2005
Posts: 9,118
Grease Monkey, Moderator General Truck Talk & Greasy Spoon
šŸ‘šŸ»


Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)
ā€˜65 Chevy Biscayne 4dr 230 I-6 one owner (Iā€™m #2)
ā€˜39 Dodge Businessmans Coupe
USAF 1965-69 Weather Observation Tech (got paid to look at the clouds)


"I fought the law and the law won" now I are a retired one!
Support those brave men/women who stand the "Thin Blue Line"! Hug a cop!


Moderated by  Hambone 

Link Copied to Clipboard
Home | FAQ | Forum | Swap Meet | Gallery | Tech Tips | Events | Features | Search | Hoo-Ya Shop
Powered by UBB.threads™ PHP Forum Software 7.7.4