Question about Cars & Trucks
Th coil is powered by the auto shutdown relay which gets power from fuse 21 in the power distribution center. There will only be power for a second or two or anytime the engine is cranking. This same power is supplied to the fuel injectors. Check to see if there is power to the injectors on the dark green with orange wire while cranking the engine. If there is double check power to the coil on the dark green with orange wire with the engine cranking.
Posted on Feb 10, 2012
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Posted on Jan 02, 2017
try checking all the ground circuits comming out of the PCM. and its also not common for a ground driver in the PCM to fail on dodges. also i have seen crankshaft sensors short out and take out pcm communication. so i would start by unplugging any sensor that runs off the 5v supply until the pcm wil talk to the scanner. if you unplug a sensor and communication returns to scanner then replace the sensor. and dont forget to check for good power and ground at the data link conector and PCM
Posted on Jan 15, 2009
SOURCE: 1998 dodge Neon no fire to coil
it sound like you have a bad crank sensor when the sensor gets hot it open circuits inside the sensor and you loose spark if you have access to a noid light see if you are loosing injector pulse also if so then you know its a good chance its the crank sensor
Posted on May 29, 2009
Tips for a great answer:
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If there is no +12 to the coil then you must trace it to the fuse box and the ignition switch because without power there will be no output. Jump a 12 volt and see if the engine fires, if so trace using a test lamp 12 volt park lamp or a multimeter.
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