I have a 1984 Chevy K20 4X4 with a 350. It starts up runs for 20 seconds then dies. Starts right back up runs for 20 seconds then dies and so on. . Ignition module is good, new pick up coil, HEI distributor is good. There isn't a single fusible link on the firewall. There are three red wires coming of the positive lead on the batt. The fat one going to the starter and 2 smaller ones that go to the back side of the fuse block, but one of those has a 40 amp fuse about 1 foot from the batt. post. I'm inclined to think its not a fuel problem because when it dies it just shuts right off without hesitation, as though you just turned the key off, no sputter, no cough, it just dies. Any thoughts?
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