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2002 Dodge Dakota Question: How to fix intermittent stalling?

 

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kpauole, 4.7L V8, Queen Creek, AZ, December 02, 2011, 14:19
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Truck intermittently shudders/stalls while driving. No check engine light & code "P Done" displays. Replaced camshaft sensor & crank shaft sensor (including connectors for both sensors). Still have same problem. Dodge mechanic believes it's ECM. ECM was replaced a little over a year ago. I'm at the end of my rope with this problem. Can't afford to be "nickled & dimed" to death replacing possible fixes. HELP!

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  • Answer #1

    dale45 from Fairway Auto Repair, December 02, 2011, 14:26
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     Journeyman

    ECM is a common problem based on the symptom (no code stall). Sometimes will be temperature related, or vibration related.
    If you can find the ecm, wiggle the wiring at the pcm connector while truck is running. Also, tap on the computer to see if you can recreate the problem.
    Dirty throttle bodies are a common problem causing a stall or unstable idle

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    kpauole, December 02, 2011, 14:35
     Rookie

    Thanks for your answer! This problem has mostly been occuring in the early mornings, outside temp @48, and after driving @15 miles (it's 37 miles to work for me one way), then it appears to run fine in the afternoon on my home from work, except for this afternoon where it did act up. If the ECM and/or cleaning the throttle body doesn't fix this, what next?

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    PARTS GUY, December 03, 2011, 15:07
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     Master

    Before kpauole replaces the PCM based on what we think, proper tests at the PCM to verify the cam and crank signal is getting to the PCM.

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  • Answer #2

    patrick mannion from Greg Solow's Engine Room, December 02, 2011, 14:35
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     Master

    Great answer Dale. Had similar problems on several Dodges found bad ECU. check this link http://www.siaelec.com/ I had them test and repair the ECU's for me, they did good work.

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  • Answer #3

    PARTS GUY December 02, 2011, 17:26
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     Master

    Does it restart immediately? What tool did you use to retrieve trouble codes?

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    kpauole, December 03, 2011, 06:38
     Rookie

    Yes, the truck will restart. A mechanic retrieved the codes with his diagnostic tools.

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    PARTS GUY, December 03, 2011, 11:35
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     Master

    What are the codes? For example P0000

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    kpauole, December 03, 2011, 11:50
     Rookie

    Initially, the codes retrieved were P0725. Since then I've only gotten the "P done" code. No check engine light, still and still intermittently stalling. Again, the camshaft & crankshaft sensors (including their connectors) have been replaced.

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    PARTS GUY, December 03, 2011, 15:04
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     Master

    P0725 Engine Speed Sensor Circuit Malfunction - With Automatic TransmissionPossible Causes Setting Conditions
    •Check for any trouble codes related to the CKP sensor
    •CKP sensor signal circuit open or shorted to ground
    •CKP sensor signal circuit is shorted to voltage
    •CKP sensor has failed
    •PCM has failed
    Engine running; and the PCM detected that the Engine Speed sensor signal was less than 390 rpm or it was more than 8,000 rpm, either condition met for 2 seconds. The Transmission Control System calculates the engine speed by directly reading the engine crank position sensor. It compares the calculated value to the engine speed sensor signal transmitted from the Engine Control System over the controllers internal BUS. The calculated engine speed is also compared to a minimum and a maximum value.

    This code sets in 1 Trip(s).
    This code will turn on the MIL (Malfunction Indicator Lamp)

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