Question about 1999 Dodge Durango

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I have a 99 durango with a 5.2, it would start then stall and now it wont start at all. I cleaned the cap and rotor,I can here the fuel pump running. I put alittle fuel in the throttle body and it acked like it wanted to start but didnt. whats the problem??

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  • 6 more comments 
  • ganserp Nov 10, 2010

    I feel the spark and vacuum is good, If the fuel pressure is low, how can I check to see if its the pump, filter or injector?

  • ganserp Nov 10, 2010

    If the pressure is low, how will I know if its the regulator or any other part? If the pressure is high its than the regulator?I will be working on it today and this helps. thanks for your patiants

  • ganserp Nov 10, 2010

    Also, Were is the regulator & filter located?

  • ganserp Nov 10, 2010

    What should the pressure be? And is the fuel rail considered the fuel line also? Thanks again

  • ganserp Nov 10, 2010

    OK, Great this all helped alot. Time to go to work. Thanks

  • ganserp Nov 10, 2010

    I tested the fuel pressure and it was 45 psi so I replaced the pump assembly,bled the line and it still will not start. There is 49psi. when I put alittle fuel in the throutle body it acts like it wants to start. Now what??

  • ganserp Nov 11, 2010

    Im done for today, I wont be able to work on it till tomorrow evening, How do I check if the crank sensor is good or bad? Also how about the PCM you talked about before, how do I check that if needed?

  • ganserp Nov 12, 2010

    well, I changed all plugs, cap

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  • Master
  • 1,796 Answers

Hi!!
Check for:
Good Spark, Fuel Pressure, Vacuum Leaks
IDLE SPEED & IGNITION TIMING Idle speed and mixture are controlled by Powertrain Control Module (PCM). No adjustment is required. PCM controls Idle Air Control (IAC) motor for proper idle speed.
Ignition timing is controlled by PCM and is nonadjustable. If vehicle is equipped with a distributor, DO NOT attempt to adjust timing by rotating distributor. If distributor is rotated, fuel system synchronization will be changed. If distributor was rotated or removed you'll need the help of an experienced mechanic to synchronize the fuel system.
Good Luck!! Keep me posted!!

Posted on Nov 10, 2010

  • 6 more comments 
  • Rene J Solis Nov 10, 2010

    Hi!!



    You'll need a fuel pressure gauge, if you have an AutoZone, Checkers or similar auto part stores you can borrow one from them.




    A combination filter and pressure regulator is used on all models. and is an integral part of the Fuel Pump. The regulator is a mechanical device not controlled by the PCM or engine vacuum.



    It is calibrated to maintain a pressure a pressure of about 49 psi (339 kPa) at the fuel injectors. The unit contains a diaphragm, calibrated springs and a return valve.



    The regulator's pressure maintenance feature permits easier starting. If pressure exceeds the specified amount, the unit routs the excess fuel back to the tank.



    Check fuel pressure at the fuel rail.

  • Rene J Solis Nov 10, 2010

    If you check the fuel pressure at the fuel rail, and it is low, you have to replace the fuel pump assembly since the fuel filter/regulator are integrated in the fuel pump inside the fuel tank.

  • Rene J Solis Nov 10, 2010

    The fuel pressure should be 49 psi (339 kPa) at the fuel injectors. The fuel port rail is the line where all the injectors are connected to and get the fuel from. It should have a Schrader Valve, like the one used to put air on the tires. Here is a diagram of how to install the tool for testing.






  • Rene J Solis Nov 10, 2010

    Ok, let me know how it goes. Good Luck!!

  • Rene J Solis Nov 10, 2010

    Remove a couple of spark plugs (one at the time) to check if they are fouled and wet and check for spark.

  • Rene J Solis Nov 10, 2010

    Also check the Crank sensor. If you have gas. good spark at the plugs and the crank sensor is OK, the truck should start.

  • Rene J Solis Nov 10, 2010

    When checking for spark, make sure it is blue and strong. Coils on this type of engine tend to fail due to their location, too close to the exhaust manifold.

  • Rene J Solis Nov 11, 2010

    Tell me what you have done to the vehicle and how did you checked the components. This way, later on I will figure out what needs to be checked and I'll tell you how to do it.

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