Runs great when cold...

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BroncBuster73
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Runs great when cold...

Post by BroncBuster73 » Sat Apr 09, 2016 12:16 am

1973 w/ 302. Runs fine for a while, but when gets hot, chokes out and dies. Then feels like battery dying, and wont crank. Let it cool off, starts right up again. Any ideas. I have new carb coming from ebay...
'73 Bronco
Uncut (for now)
302
HD package
U153 body code (cant find info!)

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Stan
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Post by Stan » Sat Apr 09, 2016 9:15 am

Check your timing - initial and total. Also your engine temperature - not by the temp gage in the instrument cluster.
When you come to a fork in the road - take it
Homer - " Facts are meaningless . You could use facts to prove anything that's even remotely true."

BroncBuster73
Bfix "What's a Bronco?"
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Post by BroncBuster73 » Sat Apr 09, 2016 1:58 pm

Thanks, I'll start there. Pretty frustrating!
'73 Bronco
Uncut (for now)
302
HD package
U153 body code (cant find info!)

BroncBuster73
Bfix "What's a Bronco?"
Bfix "What's a Bronco?"
Posts: 9
Joined: Tue Mar 29, 2016 8:15 pm
Location: Big Island Hawaii
Contact:

Post by BroncBuster73 » Sat Apr 09, 2016 6:17 pm

Curious how timing would cause this? It seems st would be more of a problem when cold? Im not a mechanic, and appreciate any knowledge on this one!
'73 Bronco
Uncut (for now)
302
HD package
U153 body code (cant find info!)

User avatar
Stan
BFix Locked and Loaded
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Post by Stan » Sat Apr 09, 2016 8:14 pm

Too far advanced timing can make an engine run warmer also when an engine is warm to hot and it's slightly seized too far advance can make it harder to turn over.
When you come to a fork in the road - take it
Homer - " Facts are meaningless . You could use facts to prove anything that's even remotely true."

BroncBuster73
Bfix "What's a Bronco?"
Bfix "What's a Bronco?"
Posts: 9
Joined: Tue Mar 29, 2016 8:15 pm
Location: Big Island Hawaii
Contact:

Post by BroncBuster73 » Mon Apr 11, 2016 9:55 am

Very interesting- thank you! Im sure there will be more questions! Ive owned this Bronco for 14 years and its been in storage the entire time. The guy I bought it from had it for 12- in storage. Pretty much relegated myself to the fact that everything needs replaced...
'73 Bronco
Uncut (for now)
302
HD package
U153 body code (cant find info!)

DirtDonk
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Post by DirtDonk » Thu May 19, 2016 10:44 am

Right on the money with timing. But two other things that can cause it are excessive fuel dumping through the carburetor for some reason, and more common still is maybe a double-issue with your timing and an old tired starter motor not liking the heat.
But timing and other distributor issues are easy and cheap to check for, so that's a good route to take.

And since this has now been more than a month... Anything to report?

Paul
'71 Bronco - 302 4v
3.5" WH/Skyjacker Lift
33 x 11.50 x15 Thornbirds on 15x7 Enkei's
Kayline soft top
Hanson bumpers
Dual batteries, Large 1G alt.

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