Re: Timing & Vacuum Advance 101
i have the original 302 in my 68z with the off road cam and headers. i can adjust everything after start and it runs great. if i take for a drive say 1/2 hour the idles higher seams everything is screwed up. i have checked for a vac leak none found. could this be my problem. do i need a different can? the distributer was rebuilt on a sun machine but maybe they installed a stock can? hopefully this is the problem.
Are you letting it get warm before adjusting? It doesn't sound like it. Try adjusting it after the drive but don't expect it to act the same cold as it does warm. If it can be tuned to be consistant when warm you can then work on the choke and how fast the engine warms up...
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