Question about 1999 Dodge Ram

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I'm having a stalling problem with my 99 dodge ram 2500 5.9L V8. Just replaced the battery, which was partially the problem, but I'm still randomly stalling out. It generally occurs when I'm idling for an extended period of time. Also when I'm slowing down to make a stop. On more rare occurrences it's dies while going about 40 to 45 mph. Any help would be much appreciated, as this is very frustrating.

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  • jdc2103 Sep 07, 2010

    Only had one code P0138, which is O2 sensor circuit high volts (bank 1 sensor 2). Not sure if this would cause a problem or not. Also why wouldn't my mechanic bring this up to me if it was a problem. As I've said, I've had the check engine light on for almost 2 yrs.

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  • 105 Answers

  1. has the check engine lamp been coming on while engine running?
  2. stall during decelleration maybe caused by the idle air controll motor
  3. remove the air intake tube connected to the throttle body
  4. open the throttle and visabily inspect the bore for carbon buildup/ clean if necc
  5. has the fuel filter been replaced?
  6. when it stalls does it restart immediately or does it have to sit a while?
  7. possible intermittant fuel pump
  8. hope this helps let me know

Posted on Sep 06, 2010

  • 12 more comments 
  • jdc2103 Sep 06, 2010

    check engine light has pretty much been on since I bought the truck almost 2 years ago, but it ran fine for the duration I've had it, until now. I've had routine maintenance on it a couple times. Was told that I would need a injector flush. Not sure if that might have anything to do with it.

    Not sure about the fuel filter. I'm pretty sure I haven't replaced it since I've had it. Is that easy to replace?

    It usually starts right away after it stalls. Sometimes have to pump the gas a little bit.

  • jdc2103 Sep 06, 2010

    check engine light has pretty much been on since I bought the truck almost 2 years ago, but it ran fine for the duration I've had it, until now. I've had routine maintenance on it a couple times. Was told that I would need a injector flush. Not sure if that might have anything to do with it.

    Not sure about the fuel filter. I'm pretty sure I haven't replaced it since I've had it. Is that easy to replace?

    It usually starts right away after it stalls. Sometimes have to pump the gas a little bit.

  • jdc2103 Sep 06, 2010

    check engine light has pretty much been on since I bought the truck almost 2 years ago, but it ran fine for the duration I've had it, until now. I've had routine maintenance on it a couple times. Was told that I would need a injector flush. Not sure if that might have anything to do with it.

    Not sure about the fuel filter. I'm pretty sure I haven't replaced it since I've had it. Is that easy to replace?

    It usually starts right away after it stalls. Sometimes have to pump the gas a little bit.

  • jdc2103 Sep 06, 2010

    check engine light has pretty much been on since I bought the truck almost 2 years ago, but it ran fine for the duration I've had it, until now. I've had routine maintenance on it a couple times. Was told that I would need a injector flush. Not sure if that might have anything to do with it.

    Not sure about the fuel filter. I'm pretty sure I haven't replaced it since I've had it. Is that easy to replace?

    It usually starts right away after it stalls. Sometimes have to pump the gas a little bit.

  • jdc2103 Sep 06, 2010

    check engine light has pretty much been on since I bought the truck almost 2 years ago, but it ran fine for the duration I've had it, until now. I've had routine maintenance on it a couple times. Was told that I would need a injector flush. Not sure if that might have anything to do with it. Not sure about the fuel filter. I'm pretty sure I haven't replaced it since I've had it. Is that easy to replace? It usually starts right away after it stalls. Sometimes have to pump the gas a little bit.

  • jdc2103 Sep 06, 2010

    check engine light has pretty much been on since I bought the truck almost 2 years ago, but it ran fine for the duration I've had it, until now. I've had routine maintenance on it a couple times. Was told that I would need a injector flush. Not sure if that might have anything to do with it. Not sure about the fuel filter. I'm pretty sure I haven't replaced it since I've had it. Is that easy to replace? It usually starts right away after it stalls. Sometimes have to pump the gas a little bit.

  • jdc2103 Sep 06, 2010

    check engine light has pretty much been on since I bought the truck almost 2 years ago, but it ran fine for the duration I've had it, until now. I've had routine maintenance on it a couple times. Was told that I would need a injector flush. Not sure if that might have anything to do with it. Not sure about the fuel filter. I'm pretty sure I haven't replaced it since I've had it. Is that easy to replace? It usually starts right away after it stalls. Sometimes have to pump the gas a little bit.

  • jdc2103 Sep 06, 2010

    whoops. didnt mean to reply that many times

  • james bierman Sep 06, 2010


    1. fuel filter is easy to replace

    2. locate filter under truck( should be on driver side on inside of frame rail)

    3. remove and attempt to blow through it backwards (reverse direction of original installation)while observing condition of fuel (color and quality)

    4. if badly restricted replace

    5. restricted filter causes the fuel pump to work too hard

    6. unfortunately fuel pump is located in fuel tank

  • auto er Sep 07, 2010

    sounds like an IAC idle air control valve, useually when a vehicle studders and stalls upon deceleration and has loss of power point to the IAC, typically found around the throttle body close to the intake.

  • james bierman Sep 07, 2010

    If you have an AutoZone in your area they will pull the code (reason the check engine lamp is on) for free. Be advised a lot of repair facilities advertise free code reading but only with repair.
    Please obtain code(s) and repost

  • james bierman Sep 08, 2010


    1. Po138 bank 1 sensor 2 should not cause your stalling. However if the circuit is high because there is a short in the sensor, It could affect other oxygen sensors. A high input from the sensor tells the computer that the exhaust stream is rich. The computer would then lean the mixture (reduce fuel) due to the faulty input. If the short is intermittant it would mimic your symtoms.

    2. remove and check fuel filter for restriction

    3. When cold does the truck start without touching gas pedal?

    4. Does it then fast idle until warm?

    5. If not the idle air motor maybe sticking (intermittant)

    6. At speeds above 40 mph the computer closes the idle motor.

    7. When you take your foot off the pedal the motor should open to support idle speed.

    8. remove idle motor inspect for carbon buildup
  • jdc2103 Sep 11, 2010

    Alright. I replaced the Idle Air Control Valve and now I'm getting 2 new codes. P0340, which is a circuit malfunction in the camshaft position sensor A - bank 1. Also P1391, which I looked up and it's a intermittent loss of cam or crankshaft position sensor, I used some carb cleaner to clean up the inside where the IAC valve goes. Was pretty dirty. Not sure if that did anything, I'm really confused now. Fixed what I thought was the problem and then more problems show up. I haven't driven it yet up to about 40 or 45 mph to let the new part get recognized by the computer yet, but I'm guessing that won't matter. I appreciate all the help you've already given me, and could use some more. thanks.

  • jay Obie Jun 30, 2013

    I'm having the same problem have you fixed it yet. and if so what was it

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