429 wont start
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429 wont start
I have a 77 f250 with a 429 in it, after you drive it and it gets warm and then you shut it off, it wont start again for about 20 mins to 45 mins. it has msd on it and I was told the box could be going bad. is there anything else it could be thanks
Laughing Gas
Joined: May 2006
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From: Port Orchard Wa
I would guess that it's flooding. Float bowl could be leaking or overheating causing gas to boil and flood. Do you have signs of flooding? Also do you have to crank it alot when cold (like the bowl is empty)?
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no when shes cold I just pump her once and she fires right up. I have a msd blaster coil also, could that be getting hot and not wanting to work again until shes cooled off??
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Joined: Nov 2011
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From: Burlington, WI
Sounds heat related, seeing as how the truck starts fine when cold. I heard somewhere that the MSD coils don't like to get hot...so it may be cutting out once warm.
On another note...my truck had a bad coil wire. When cold, the copper end in the coil was large enough to make contact on the inside lug of the coil. When hot however, it would shrink...causing it to "disconnect".
On another note...my truck had a bad coil wire. When cold, the copper end in the coil was large enough to make contact on the inside lug of the coil. When hot however, it would shrink...causing it to "disconnect".
Laughing Gas
Joined: May 2006
Posts: 1,140
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From: Port Orchard Wa
Could be that the coil continues to get hotter after you shut her off and then quits. When I've had a bad coil it just quit even while still running. Don't know specs on MSD, but if you do an internet search you may find the resistance specs for the coil and you can check when hot.
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okay this is how it goes. ill go out and start it, starts right up. never had a problem for 3 years. ill take it out get the motor warm and come back home shut it off, start it again shut it off do that a few times then about 10-20 minutes later itll just crank and crank and crank. when I pump it and then i put my foot to the floor and hold it itll kinda diesel barely for a half second and keep cranking.
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