My car used to be running the instant you hit the switch. Now something has changed, and I don't know what.
Now it has to spin a while before it hits, and then it runs rough until it warms up.
Once warmed up, it seems to run just fine, except for a bit of a bang out when moving to the higher end of second gear, only second, no other gear.
I've set the auto chock from full shut, to about 3/4 shut, and no improvement.
I've gone from points to electronic, back to points with no improvement.
If I set the timing at 10 degrees BTDC it will only fully advance to 12 degrees ATDC. I couldn't get it to run worth a hoot like that, so I set it at 23 degrees full advance, and that has it is running at about 9 degrees ATDC at idle . It seems to run fine with that setting, except for the slow start, and the second gear bang out.
I have even tried running hotter plugs in an effort to cure the starting annoyance, but to no avail.
I'm running a vacumn advance distributor, with a single pic 30-31 carburetor.
I know the vacumn advance is working, just don't know if its fully working. Can a vacumn advance work just partially, or is it either good or bad, with no in between? The reason I ask this is the fact that I can only go from 10 deg. BTDC to 12 degrees AFTC.
I had blocking plates on my heat risers, and recently tried running them open. Could that have made the difference?
Should I try setting the timing at 28 degrees full advance?
Before I start messing with it again, I'd appreciate any and all advice.