Question about 2004 Dodge Intrepid

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No fire to the plugs - 2004 Dodge Intrepid

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  • dbolduc6 Apr 22, 2009

    N0 fire to the coil or the spark plugs.

    I replace the computer whit a good one still no fire.

    How can I check the crank censor and the cam censor whit a v.o.m meeter.

    Can I use the freq. mode to test while cranking the motor.

    thank you .

  • dbolduc6 Apr 23, 2009

    THE COIL AND SPARK PLUGS AR NOT FIREING on the 1995 intaped.I thank you for your help. BPALepine

    I will try your sugestion and let you know.

  • Matthew Lepine
    Matthew Lepine May 11, 2010

    Are you trying to say that the spark plugs aren't sparking or the coil pack isn't giving current to the spark plug?



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Well let me give you a brief understanding of the electrical ignition system.

The PCM controls the ground circuit for the ignition coil ground circuit. So basically the PCM determines when to open and close the ground circuit for each individual ignition coil, therefore making it give power to the spark plug or not.

The ignition coils get there power from a power distribution center which as an ASD (Automatic Shut Down) Relay located inside of it. So your problem may lay within this.

Also, like you said, you may need to check the crankshaft and camshaft sensors because they give information to the PCM which then calculates the best timing for the system.

To check the crankshaft sensor first check the harness and test to see if the sensor is getting 5.0 volts. To do this you need to connect the positive end of a voltmeter to the orange wire terminal and the negative lead the the black/lt blue wire terminal at the harness connector. Then turn on the ignition and check the voltage. If voltage isn't right check the wiring between the PCM and the sensor.

If you are getting the correct voltage next check the sensor itself. You need to reconnect the harness to the sensor and you need an analog voltmeter. Then you need to backprobe the harness, which is sliding the probes from the meter into the wire side of the harness, if you meter has clips then get a sharp pin and slide into the harness and clip the meter to the pin.

Checking the Crankshaft Position Sensor

With the sensor connected, backprobe the gray/black wire terminal of the sensor connector to the positive lead on the analog meter and the negative lead connects to an engine ground. Turn the ignition key On and with a breaker bar and sockey manually turn the crankshaft clockwise. Do one full revolution and keep an eye on the meter, if you get readings of 5.0 volts then the sensor is good if not replace the sensor.

Checking the Camshaft Position Sensor

Again check the harness for the sensor first. The positive lead of an analog voltmeter connects to the orange wire terminal and the negative lead to the black/lt blue wire terminal. Turn ignition on and you should get approx. 5.0 volts. If voltage is incorrect check the wiring.

If wiring the harness is giving adequate power now check the sensor. Its the same idea used to check the crankshaft sensor but this time connect the power lead of the meter to the backprobe connected to the tan/yellow wire terminal and the ground lead to a good ground. Turn ignition On position and manual turn the crankshaft clockwise a full revolution while also checking for the meter to fluctuate between 0.0 and 5.0 volts. If you don't get the proper reading then the sensor is bad.

This should help solve your problem.

Posted on Apr 22, 2009


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