360 won't stay running

[Lincolnator]

So I have installed a rebuilt 1986 360 engine in my 1988 Ramcharger. New edelbrock intake, carb, all new fuel lines, fuel pump and sending unit. Truck starts up and runs great for about 3-5 minutes and shuts down. I am thinking an electrical problem. I have made it egr delete and removed all emissions pump, sensors etc. Can some omne give me an idea of what I am missing?

 

[1979 300]

Try replacing the ballast resistor. They can heat up and shut the engine down. It should be on the firewall, easy to change.

 

[diymirage]

Sounds like you might be out running your fuel

Do the bowls have sight glasses ?


The ballast can be bypassed to run a solid 12volt for diagnostic purposes


After the truck dies, what happens, hit the key and it fires right back up or does it it need to catch its breath ?

 

[David Vandercook]

Yeah, does it restart after it dies? If not test spark once it dies, if you got spark dump gas in the intake, see if it runs a couple seconds then. Should get you started.

 

[Marshall]

One post and then takes off?

 

[metalchewy]

Old coils can separate internally after heating up. Work fine up until that point.

If you have a spare, swap it in and see if it helps.

 

[diymirage]

One post and then takes off?

Jup, hasn't even been on the site since that one post

We should make it so you can't post anything unless you have at least 100 posts

 

[JC Mellado]

I´m having the same problem as described intially by Lincolnator. I´ve done suggestions described above. Any additional suggestions? I´ve also changed rotor, sparkplugs, spark plugs cables, distributor cover. Any help sincerly appreciated.

 

[metalchewy]

I´m having the same problem as described intially by Lincolnator. I´ve done suggestions described above. Any additional suggestions? I´ve also changed rotor, sparkplugs, spark plugs cables, distributor cover. Any help sincerly appreciated.

Do you still have spark after it dies?

 

[JC Mellado]

Yes, it starts again but then revs go low and then just dies.