crazyoctopus Posted December 26, 2009 Share Posted December 26, 2009 alrighty, so i recently bought a 73 240z project car and i am stuck. the problem started with no fuel, but the fuel pump was bad, so i swapped in a new one and other than the lines being clogged, that issue is resolved. then i checked to see if i was getting spark, and i was not. so i replaced the distributor cap, points, rotor (the guy that spins in the distributor), coil, spark plugs, and plug wires (installed correctly checked twice). still no spark. so i started to forum search to try to diagnose the problem. ==to check if i got spark or not i removed the plug wire from the #1 spark plug and put it close to the block, head, and spark lug to see if it arced. -I checked to see if the coil was getting power by removing the ground wire, attaching a new one, and seeing if there was spark whever i touched it to brae metal. -hard lined positive end of the coil to the positive terminal on the battery, hard lined a new ground to the negative side of the terminal, checked to see if i got spark, nope. there are a few things attached to the coil and distributor that i am not really sure if i need them/ what they attach to, and they might be what is causing the no spark. here is the coil 1. is a coil condenser? i think. this came with the car and the wire was borken so i spliced it back together 2. BY wire, is a wire that goes to, i think, the ignition. 3. is possibly a ground but i have no idea where it grounds out 4. i have no idea what relay it is 5. i have no idea what this is here is a condenser that i replaced, and there is a prong sitting at teh top of it that apparently goes to the coil negative side, but where would i connect it. Quote Link to comment Share on other sites More sharing options...
crazyoctopus Posted December 27, 2009 Author Share Posted December 27, 2009 found this post http://forums.hybridz.org/showthread.php?t=146660&highlight=coil+resistor and am going to try it in the morning, hopefully it will be my savior. Quote Link to comment Share on other sites More sharing options...
crazyoctopus Posted December 27, 2009 Author Share Posted December 27, 2009 alright, so i checked the wire to the back of the tach, and that was fine, all of the wires were solid. i took out my volt meter and found that i was getting 13V from the BW wire on the resistor to the GW wire on the reisistor. when i tested the power from the + side of hte coil to the - side of the coil it read 0V. started looking at the connections, recleaned them, replaced the plugs and tried again. same results. since we were getting power to the resistor but not through the coil i figured that it might be a bad ground (B wire on - side of coil). so i added a ground wire to it, and FINALLY got voltage running through the coil. while key is in the "ON" position and resistor connected i was getting... +/- on coil is 6V +/- on resistor is 6V High tension (nipple from coil to distributor) to (-) on coil is 6v while cranking the car +/- on coil is 7.75V +/- on resistor is 0V High tension (nipple from coil to distributor) to (-) on coil is 8v this is where it gets weird. when i connect the voltmeter to the the distributor cable it shows no volts running through it. when i take off a spark plug wire at any cylinder there is no spark running through it. so i dunno, the coil now has power going through it. but whenever itwants to transfer to the distributor it shows no voltage, and i would think that there would be. so what is the next plan of attack? is it in the distributor? i replaced the points, rotor, condensor, and cap. Quote Link to comment Share on other sites More sharing options...
crazyoctopus Posted December 28, 2009 Author Share Posted December 28, 2009 i actually have both now. i have a hard wire to ground, as well as a wire to the points. the only way that i was able to get any power running through the coil was if i hard lined a ground on the negative side of the coil. here is a photo of what the current set up is... Quote Link to comment Share on other sites More sharing options...
crazyoctopus Posted December 29, 2009 Author Share Posted December 29, 2009 problem solved thanks to Curtis240z on classiczcars.com here is the link to the post http://www.classiczcars.com/forums/showthread.php?p=312423#post312423 Quote Link to comment Share on other sites More sharing options...
jasper Posted December 29, 2009 Share Posted December 29, 2009 (edited) Glad you fixed it. I would stongly suggest you read up on how a points type ignition system works. They are all the same. You will benefit greatly. You will never get stuck by a bad ignition if you understand them!!! http://auto.howstuffworks.com/ignition-system4.htm Edited December 29, 2009 by jasper good info Quote Link to comment Share on other sites More sharing options...
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