Question about 1992 Chevrolet Lumina

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My car is not getting fire to the crankshaft sensor. what could be the problem?

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Fire on the Sensor? Yes this is a problem. Take the vehicle into the mechanic and have the engine repaired before it becomes an even larger problem.

Posted on Sep 08, 2009

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Posted on Jan 02, 2017

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01 dodge dakota 3.9. no power to coil replaced engine control relay still no power can jump across relay get power but no start and get code for no rpm


If you're getting a code for no RPM, the PCM is not receiving a signal from the crankshaft position sensor. The PCM uses the signal from the crankshaft position sensor to fire the coil/spark plugs. Check the wiring to the crankshaft position sensor and check the sensor itself.

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Make sure the coil is getting power. Then you would need to check the crankshaft sensor for continuity after unplugging it. If the coil is getting power and the crankshaft sensor is tested good, then the brain box must be dropping the signals.

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Why does the crankshaft sensor not get any fire on a 1995 ford windstar?


It's not supposed to get "fire" to it. It is a sensor that tells the ECM or PCM the position of the crankshaft so proper timing is given by the ECM (computer)

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Did you check to see if you are getting voltage to the coil ?
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The crankshaft sensor is responsible for sending a signal to the PCM (powertrain control module) it tells the computer what cylinder to fire at the coresponding time, it lines up with whats called a trigger wheel on the crankshaft as the crankshaft spins there are small notches cut into the trigger wheel when 1 of the notches lines up with the crankshaft sensor a magnetic field forms between the trigger whell and the sensor and the computer charges the coil for that corresponding cylinder, once the magnetic field dissappears when the notch passes by the sensor the computer fires the spark plug for that corresponding cylinder if you have a bad crankshaft position sensor you will more then likely have a stalling condition due to weak spark or if the sensor is totally gone your engine will just crank and not start due to the spark plugs not having any spark being delivered to them......

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1 Answer

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does it have a crankshaft sensor? My experience is cam position adjusts timing, crankshaft sensor allows ignition.

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Need to know what fires coil 1995 mercury sable both wires to coil have power when key is turned on car cranks no spark from coil new coil what gives the coil extra power to fire


what engine? 3.0L 2 Valve? 4 Valve?
3.4L SHO engine?

The PCM (engine computer) fires the coils, but it is never the cause of a problem. I suspect it is the crankshaft position sensor on the front of the engine by the crank pulley. easy to change.

Crankshaft Position Sensor The crankshaft position sensor (CKP sensor) (6C315) is a variable reluctance sensor triggered by a 36-minus-1 tooth trigger wheel located on the crankshaft pulley and damper. The signal generated from the crankshaft position sensor is called the crankshaft position (CKP) signal, which provides base timing and crankshaft speed (rpm) information to the ignition control module (ICM) (12K072). Base timing is set at 10±2 degrees before top dead center (BTDC) AND IS NOT ADJUSTABLE. The powertrain control module (PCM) (12A650) will use this information with the spark advance information to determine ignition coil (12029) turn on or turn off time.

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SONATA V6 2000 DOES NOT START NO FIRE CODE PO335


The crankshaft sensor determines when to fire the plugs; if it has failed, no plugs will fire.
If you have no mechanic friends who know how to test this sensor, you should probably invest in an aftermarket service manual. They have simple tests for most sensors and conditions that don't require costly equipment or detailed knowledge.
I prefer Haynes and they are available on line here:
Haynes Sonata Manual
You may also find them elsewhere for a few dollars less.

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