[jyar123]

I am installing a billet distributor on my 67 camaro. I am having problems with the power supply going to the coil. The wire test 12.5 volts when the switch is turn on but drop down to 7 volts when I turn the starter over. I tried to bypass this wire and ran a wire straight from the fuse box that is a switched power and get the same results. I am not getting any fire to my plugs at this voltage. Has anyone ever had this type of problem?

[T-bucket23]

Waht is the voltage across the battery when cranking. If it is standard wiring you actually should see more voltage when cranking than when running. What brand distributor are you running.
If you ran a jumper from a hot source and the voltage is still low, either the battery is weak or you have a bad connection on either the feed or the engine ground.
Check the vlotage across the battery, if it is good while cranking,(above 11) try running a temporary jumper from teh battery to the coil and see if it helps.
When you are measuring the voltage at the coil, where are you connecting the ground for your meter

[EOD Guy]

I too have a 67 Camaro with a HEI conversion in it...... Last Sat it took a dump on me ...... It turned out to be the 4 pin ignition module in the bottom of the dizzy....... did some research..... seems the old style external regulators are very hard on the ing module and make them burn out on a reg basis....... also found out many venders make the 4 pin module and the one from the chevy dealer lasts the longest. I replaced mine with one from ORiely's and it started right up. Solution is to up grade to a solid state regulator or convert over to a new style alt with the reg built in.

[jyar123]

I am running a Procomp 8021 billet distributor with a PC91 coil. I have tried measuring the voltage on the negative side of the coil as well as the ground connection on the block and directly to the battery. I took the new distributor off today and put my old one on. It is a GM distributor and a Mallory voltmaster coil. It fired up the first time. The only reason I wanted the Procomp was because it was billet and listed as a ready to run distributor. Does anyone have any feedback on Procomp products?

[SSedan64]

Haven't heard many good things about that Coil. Try Googling that part #, I'm sure some Info will come up.