Quote:
Originally Posted by Shockwave78
Installed the new rocker nuts and....... still no power. Might be a bit better but not by much. On the highway at WOT it cant get past 60. Also on the highway cruising at part throttle it missed or coughed 3 or 4 times, on the 30 minute test drive, that was the only time. The last thing I noticed is, at WOT when the top flap of the secondaries open as much as they can (which isn't much, maybe a quarter open) there is white fuel vapor being blown out of the top of the carb, enough to hit the windshield and cover it in gas droplets. I cant tell if it is out of the primaries or secondaries.
And to add insult to injury, my oil pressure gauge stopped working and is stuck at 60 psi
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With too hot of a spark plug the HEI will compensate at lower RPMs buy reducing the dwell at lower RPMs. It will run fine at lower RPMs with too hot of a plug. Once you get above 2500 RPM an overly hot spark plug will fame out and do what you are describing on the secondary air door.
If you happened to retard the cam timing the colder spark plug will help some, but wouldn’t correct it. The pumping compression reported does not describe a cam timing problem. Double checking the cam timing is probably the next step I would do after trying a little colder spark plug.