78 Dodge W150 No Spark Help Please
Hello, Im Mason, I have a 1978 Dodge W150 with a 360. It has no spark, I have done a spark intensity test from the coil plug wire to a good ground. No spark. So I replaced the coil, still no spark, replaced the ballast resistor and the 5 pin ecu. Still no spark. Replaced the battery with a little bit higher cold cranking amps. Still no spark, so I started to do tests with a multimeter at the 5 pin Ecu plug and they all check out. 12 volts when battery is fully charged at 12 volts in 1-3 cavities and between 4-5 the resistance is correct from the pick up coil in dizzy. The Ecu is also showing it has good ground. So idk what my problem is. I have un did my whole wiring harness and there's no chewed up or burnt wires. Can someone tell me what's going on or maybe some suggestions. I have looked at wiring diagrams and everything is hooked up right according to the diagram. It's not that crazy of a system, but it has stumped me at this point. I don't know what's going on. Please help. Oh and it cranks over fine but no spark or fire. Thank you. one other random question, would you lose Spark at the coil because the pick up coil or reluctor is bad? Or does that just have to do with spark for the plug wires? Because I have no spark at the coil, I haven't replaced the pick up coil or reluctor. But that's litterly like the only things I haven't replaced, those or the alternator. Thank you again. |
Have you verified all the connections in the harness plugin at the cowl, this is a problem aria.
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Originally Posted by Iowan
(Post 144415)
Have you verified all the connections in the harness plugin at the cowl, this is a problem aria.
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Power to the + side of the coil? With a test light?
Pulsing Light on the - side of the coil when cranking? with a test light? If all the answers are yes.... Check the timing chain... |
Originally Posted by RacerHog
(Post 144423)
Power to the + side of the coil? With a test light?
Pulsing Light on the - side of the coil when cranking? with a test light? If all the answers are yes.... Check the timing chain... it ran before and never back fired, What would the timing chain have to do with getting spark back? I don't even have Spark at the ignition coil wire. |
If the distributor is not turning... You will not get spark.
Should have it in both... - side of coil should flash.... |
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Originally Posted by RacerHog
(Post 144423)
Power to the + side of the coil? With a test light?
Pulsing Light on the - side of the coil when cranking? with a test light? If all the answers are yes.... Check the timing chain... |
Mason,
You are welcome for the help. But you put in the blood, sweet and tears. Hope you get to enjoy all the hard work you have put into the project so far. I am happy that you let me be apart of your project. Glad I could help. Stay motivated an Mopar on !!!! I'm Sure Dad is smiling an looking down on you... Be Blessed and refreshed !!! |
Originally Posted by RacerHog
(Post 144555)
Mason,
You are welcome for the help. But you put in the blood, sweet and tears. Hope you get to enjoy all the hard work you have put into the project so far. I am happy that you let me be apart of your project. Glad I could help. Stay motivated an Mopar on !!!! I'm Sure Dad is smiling an looking down on you... Be Blessed and refreshed !!! |
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