Hello everyone!I just finished my rebuild on my Pontiac 455 and i am experiencing problems with my distributorI am getting no spark, at all... this distributor is an HEI distributor with a new delco remy coil, new cap, new rotor, basically new internals in my old shell.it was working before removing the dist. for the rebuild and nothing on the dist as changed.... i reset the dist where it should be (top dead center, gear at the right firing position.) and had it all buttoned up. but when i turned the car over i got nothing. no spark.. no boom... only sad... and disappointed looks from buddies...Where can i stat the trouble shooting process? I know that it is put together correctly... i know that it is in correctly... but I m lost. I've looked at possible grounding issues but i cant even remove a plug and get it to spark against the block. the distributor is getting power from the battery and there aren't any visual issues with the connectors/connections on the wires in the dist... anybody have that "I know what you forgot to do, i did that once" feeling? seriously, don't think anything is too obvious, i am past the point of frustrated to mind someone checking whether i did something.I just checked the main ground for problems. but im not having any problems with the starter or any other things so i dont think it is that... im lost.. help!!!
pop all the spark plug wires off the cap.. disconnect the BAT wire...take the whole darn thing out.. lets do this on a work bench....do you have a digital volt meter.. disconnect the 3 wires to the cap.... take the cap off..take the rotor out.. flip the rotor over.. check if for burn marks. where it could have burned thru.. stealing all your spark...with your digital volt meter set to continuity beep touch one test lead to the distributor housing.. the other to the center of the 3 wire harness to the cap... do you get a nice clear beep.. like you would if you touched the probes together..touch the red wire to the 3 wires at the cap connector.. and the B+ connector at the module... do you get a nice beeping noise...touch the yellow wire at the 3 wires at the cap connector.. and the C or C- terminal on the ignition module..hint.. the HEI module is grounded to the distributor housing by the hold down screw closest to the B+ and C end.. this is important.. no ground via the hold down screw no spark...next... carefully remove the connector that plugs into the other end of the module for the PICK UP COIL... turn your meter setting to 2K ohms... (2,000 ohms) measure the resistance of the pickup coil... usually around 980 ohms.. but anywhere between 500 and 1,500 ohms is almost accepted...before disconnecting from the pick up coil.. and be very careful the wires to the pick up coil are very THIN.. change the volt meter setting to 20 volts AC or 2 volts AC.. if you only have a 200 volt AC that will do also... spin the distributor shaft... do you get over 1.0 volts AC.. you should...if the connector terminals to the pick up coil are GREEN..not the wire color.. but the grease color.. you have an issue..the module can be tested at most parts stores for free.. or if you have verified everything else.. you might narrow it down to the hei... it still could be other things.. the grease under the module is special.. its dielectric tune up grease... it is a thermal compound.. transfers the massive amount of heat out of the back of the module to the distributor housing.. failure to have the proper grease or no grease at all.. will cause the ignition module to be RUINED.. it may function if damaged.. but it will never fix itself once thermally damaged.......lets check in the cap.. pull the coil cover off.. look in and verify the coil is bolted down at the corners.. make sure that there is a ground strap that fits into the cap before the coil gets installed... make sure that the upper corner of the coil laminations where the black wire has a ring terminal is attached it clean of paint or finish.. the underside where the folded ground strap also...please check the sides of the coil for signs of high voltage leaks..now to bench test the COMPLETED HEI distributor..got a set of jumper cables???got a test lead you can hook between the HEI cap BAT+ terminal and a battery positive.. probably want to hook this up last..a metal plate you can attach a jumper cable to.... a pair of battery jumper cables..hook both clamps on one end to the negative battery post.. hook one to the metal plate hook the other to the distributor housing.. turn completed distributor less spark plug wires upside down on the metal plate.. now.. hook up the wire from the B+ terminal on the cap to the positive battery.. spin the shaft.. you should if your hei works have sparks flying out of the cap terminals to the plate hooked up to the ground clamp on the work bench..warning.. if you don't have jumper cables from the distributor housing and the steel plate to the negative battery .. you are going to get shocked..this allows you to test the HEI on the work bench...please use care when working around HEI.. they can cause some damage if you get shocked by them .. similar to this
one way is to make sure wires are conneccted correctly on coilremove positive coil wireconnect coil to battery positive post with jumper wire.pull coil wire off dist, hold it 1/4" away from the intake. a bare spot works besthave someone turn ebg overif you have spark you have a ign wire prob. if no spark then try another coil jumped to bat. if no spark it is your dist. clean points and rotor and inside cap etc.engine must be grounded to body.
78, I hope you got it running by now. I know the feeling well. If it were mine, I would probably have goofed the installation of the electrode under the coil, broken the rotor or yanked a wire somewhere. If not that, hey if you have double checked your work its probably not that. Get out the multimeter and test the new coil, look for faulty new parts and be sure the rotor is turning when you crank. I know I'm late to this party but hopefully you aren't still chasing it down.