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1997 Dodge Ram 1500 Question: Truck starts and idles fine but boggles down when put under a load.

 

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Big Red Fred, 3.9L V6, Kimberling City, MO, January 20, 2014, 04:31
 Rookie

I have replaced the plugs, distributor cap, rotor. check the thtrottle body sensor and the volteage did not increase when the throttle was moved so I replaced the throttle body sensor. Checked it and the voltage increased and the trottle was increased. Thought I had the problem solved but after a test drive it still has loss of power. took off the throttle body and cleaned it as well as the IAC and also checked the map sensor to make sure it was not clogged. Truck still has a loss of power and the idle now is slightly higher. I would also note that the check engine light is not on. Any advise. Thank you

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  • Answer #1

    Tires Too (133 Answers) , Londonderry, NH - (603) 473-4287
    tires too January 20, 2014, 04:49
     Journeyman

    What is fuel pressure? Is the exhaust plugged?

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    Big Red Fred, January 20, 2014, 04:52
     Rookie

    I have now check the fuel pressure and it is consistent around 52 psi. Checked it again and is was 35. RE checked went to 52 and the needle is now bouncing severely

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  • Answer #2

    Greg's Orange Auto (13211 Answers) , Orange, CA - (714) 361-9386
    globalhelper January 20, 2014, 06:55
     Master

    REMOVE AN O2 SENSOR AND DRIVE TO SEE IF ISSUE IS GONE,IF SO EXH IS PLUGGED

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    Big Red Fred, January 20, 2014, 06:57
     Rookie

    I will try that thank you.

    I removed the upstream o2 sensor and it made no difference it still bogges down and has no power. I also unhooked the MAP sensor and the truck still started. ???

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    asksteevies, January 28, 2014, 16:51
    Profile_thumbnail
     Master

    Bad pump

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    Big Red Fred, January 28, 2014, 16:59
     Rookie

    I believe so and have ordered a new one. Hope to put it in tomorrow. Thanks for all the help

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