The points will spark, thats why you have to replace them, they pit and burn. dual point are design to increase the dwell, give the coil more time to build up charge. with dual point the last set to break will spark, then the first set to close sparks. I'am trying not to go into to much detail, but thats the simple version. You could of developed a carbon track on the rotor or cap and getting cross fire. or the point could be dirty and causing a misfire. At 02:52 PM 2/06/05, Nichols wrote: I recently had some trouble starting my '58 DeSoto. It has the 361 engine with dual points in the distributor. It was running fine and then apparently started running very rough and then died. I couldn't get it started again. Gas flow was fine. After filing the points down a bit it started but still wasn't running right. Before the filing, the spark was very weak at one set of points and non-existent at the other point. After the filing the spark was much better at the one point but still non-existent at the other. I am going to replace both set of points and rotor, etc. My question is this: Should both sets of points spark equally? The car is backfiring and also there is black smoke coming out the tailpipes that wasn't there before. Engine is sound and has good oil pressure and compression. Any info greatly appreciated. thank you. Nick Nichols. ************************************************************* To unsubscribe or set your subscription options, please go to http://lists.psu.edu/cgi-bin/wa?SUBED1=l-forwardlook&A=1
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