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Could be a bad coil, bad Ignition Control Module (what controls the ignition coil as commanded by the engine computer), or a bad crank position sensor, or cam position sensor. Or the wiring and circuits to all the ignition parts.
Often it is the crank sensor (CKP sensor)-The pcm must have this information from the crank sensor to determine spark timing. If no good signal from the crank sensor, there will be no spark.
No year, make or model. The ECM controls the spark by grounding the coil/s. It uses the crank sensor to determine the spark to cylinder needing fire. No fire would point me to the crank sensor and wiring to it.
Yes you are heading in right right direction. Check to see if there is spark out of coil. Spark at coil means replace distributor or rotor. No spark at coil replace ignition module or crank sensor good luck. Oh yea crank sensor is cheaper i would try that first if there is spark out of coil.
A test light connected across the coil primary leads should flash on + off when engine cranks(coil sparks when 12v turned OFF due to collapse of magnetic field).If you get pulsed 12 volts,and no spark from the coil,the coil is bad.If you don't get the pulsed 12 volts,trace back to find out why(the PCM turns the coil ground on and off,12 volts comes from switched IGN source)
If you have access to an OBII scanner, while cranking you can read all the faults that computer is tracking. Scanners run about $60 but are 1 of the best tools you can own vs throwing parts at it. It's $60 well invested. It resets lights also.
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