3/30/2024 0 Comments Alligator clips ace hardware![]() ![]() Anyway, I pulled a plug and sure enough nothing. I thought I was chasing the same symptoms. So I searched the forum and went through a few threads. ![]() So I try to start it and low and behold, it acts like no spark. It's a 383 that drove to where it sits.months ago though. Each grounding should result in a spark (In this photo you need to hook up the ECU ground wire, I left it off for the photo) View attachment 1715095422 ![]() Take the bare connector end or this clip lead (the yellow) and with everything hooked up, ground it repeatedly. I have removed the other distributor wire for simplicity. Should produce sparks at least 3/8" and typically 1/2" long View attachment 1715095421īelow, distributor "one wire" test. In the car these are polarity sensitive, but for testing does not matter View attachment 1715095418īelow, the coil NEG connection View attachment 1715095419īelow, battery PLUS connection, one wire to this terminal of ECU and jumpered over to + side of coil View attachment 1715095420īelow, all hooked up and ready to test (except for battery ground). ALL you need is one wire from batt NEG to the ECU case View attachment 1715095417īelow, the two distributor connections. No, LOL the spark won't blow up the bulb View attachment 1715095416īelow, the ground connection. A battery, the ECU, distributor and a coil, and of course some test leads View attachment 1715095414īelow, the basic diagram for a 4 pin ECU View attachment 1715095415īelow, the wire for testing spark. You can easily test the ballast separate. This is all you need to test the basics of the ignition. MP ECU is $50 and a day away if I order one. Very limited time with helper to test anything in crank. It needed it anyway so no loss, but frustrating as heck as "spark check" at coil wire is hit n miss. I thought I had it beat with the new harness. Resistance at ECU cavities 4&5, key off everything hooked up 278 Ohms.(fsm states between 150& 900) so good. Lasted less than a minute then quit again.īallast resistance 1.7 ( was 0.7 before)?ĭist leads harness side 8.7 Mega Ohm resistance? (With everthing hooked up)Wtf? ECU cooked? Hooked to distributor and fired right up. Had Lori turn it over again and sparked from coil wire properly. Wiggled wire in coil and saw a spark from coil tower. I unplugged coil wire at dist cap, had Lori turn it over.no spark. Hood up, idle up a bit and I was watching under the hood. It loses spark from coil after running a bit(5 min). Well Del, whatever the "fix" it was temporary. I can only imagine how difficult it is to relay good sound advice/info to us/me thick headed electrically challenged members.Īny good sources for repop harness? I tried M&H, Rock Auto, JC Whitney, and have come up empty. I got looking and quite a few wires under the hood need replacing. Looks horrific under the hood! My goal is to eventually pull the 360(needs regasketing at the very least) and clean up under the hood A LOT! And make a run or 2 to the dump.might just leave it there. At least its running and now I can try to get it running decent. Ring terminals on all 6 and threaded together with nut/bolt/washer. Nothing in town here at hardware store, or parts store for a "bulk terminal", so I Macgyvered/cobbled the 6 red together to at least try to start again. I got the new ECU harness "wired in" temporarily. I was wondering whether I should turn this into a for sale ad( and I still might lol). GAWD I "love" the "new improved" software A battery, the ECU, distributor and a coil, and of course some test leads SUSPECT a bad ECU connector OR a bad DISTRIBUTOR connector IF you hook it all up and it WORKS, then there is something AFU in the car harness. Coil should make 1 spark each time you do so. Take first one, then the other pickup clip leads, and "tap tap" ground them at the battery connection. Twist the distributor shaft while holding the test probe near the coil tower. Hook something from coil "case" to a probe for testing spark. This is your battery "hot" when you are ready Get a clip lead hooked there and let dangle. Hook coil + to the power lead terminal on the ECU. Find the two distributor pickup terminals on the ECU. You need a coil, the ECU and the distributor Here's a post I made about the simplest way I know to get across testing the ECU/ ignition parts ![]()
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