Thread: 1976 caddy 500 cu in V8 engine misfire at temp and speed. OK idle

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Check the timing chain for wear. Use a timing light as you slowly increase rpm and see if the timing walks/moves around at speedy rpm stops along the way as you increase slowly.

vacuum and timing look OK last check. Waiting on more knowledgeable friend to stop over and help troubleshoot. Hope I don't have to remove cab to pull engine...

new holley carb on order. will recheck timing and vacuum again before swap out late next week. If new carb doesn't do the trick, it is pull cab snd engine in fall. (HOPE NOT!)

Originally Posted by johnny52

new holley carb on order. will recheck timing and vacuum again before swap out late next week. If new carb doesn't do the trick, it is pull cab snd engine in fall. (HOPE NOT!)

Just curious, why not get a kit for the Holley carb you've got and rebuild it? Gotta be cheaper than a new one!