I am finally able to drive my car farther than the video store, and now I
have a problem thats kickin my butt. A couple of years ago I put pertronix
ignition on my car. It has never went very far, because of my brakes until
recently. I notice now I have a pinging. It used to be very bad, and I regapped
the plugs an extra .005 of an inch and it cut the noise in half. I have retarded
the timing another 5 degrees and That also helped alot. But I still have ping. I
went up 2 sizes in metering rod springs. no change. It seems to do it when its
warmed up a lot. I disconnected and plugged the line into the brake booster to
see if that was the culprit. I had my tach and timing light on it, watching
intently, and then I noticed something strange. the car had been running now for
about 5 minutes, after a couple more minutes, I saw the RPMs start to go up
slightly, about 100-150 RPMs. STRANGE! I sprayed a little starter fluid over the
carb, and it acted like it wanted to die. Not exactly what I was expecting, but
I know how the car will act if it gets ether spay sucked in. I started spraying
around the intake manifold and the base of the carb. I have it pin pointed to 2
spots where the car wants to die when I spray the ether. One on the base
of the carb and the other on intake manifold. Will a vacuum leak like this cause
my car to ping as it gets warm, especially hard throttle and going up hills????
I really need some good insight on this.
Just to answer the obvious questions first- I am using 91 octane with 104
Octane booster, The engine was rebuilt about 3 1/2 years ago, the vacuum advance
seems to work, and I am using Autolite 75 plugs. (the only difference according
to parts man between these and 85 is that one is resistance and one is not, I
guess it affects radios and computers). Any help or answer to my questions are
greatly appreciated.
Marc 1960 4drht.
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