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#1
02-17-2024, 02:19 PM
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71 400 Not firing on #4 and #6 cylinder
Gurus,
Asking for a friend: Swapping out 66 389 with mild 71 400. Problem he cant get #4 and #6 cylinders to fire. The following have been done: New cap and rotor (HEI) New plug wires, new plugs, swapped plugs around. Fires spark when wire is pulled off of plug.. Valves opening and closing, (hydraulic) adjustment checked. Timing checked, firing order checked 10 times. What has been done is 66 389 timing cover and balancer has been put on the 400 but this should not keep 4,6 from firing. All cylinders at 120 psi. We are STUMPED HERE! HELP!! |
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