Question about 2003 Ford F350 Super Duty DRW SuperCab

3 Answers

While driving truck stops, engine remains on but nothing happens

While I drive the truck loses power, engine remains on but when I press accelerator nothing happens. The engine light comes on and I have to turn off the truck and restart it for the truck to perform normally. It runs okay for a few miles then does the same and I have to repeat turning it off again. Before it started this I depressed the pedal and it would skip badly.

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  • oglesby_jack Sep 11, 2009

    The truck starts right back up when I restart it. I had autozone to check codes on it the following codes came up;



    p2139 and p2140



    The oil has been changed regularly, I have 153,000 miles on it, I bought it with 95,000 miles, I have never changed the fuel filters, it sometimes has a smallskip to it when driving before it started the problem

  • oglesby_jack Sep 16, 2009

    Very helpful

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Does the battery have a full or good charge. WHat happens when you turn the key to start it? Anything? Clicking? Nothing? If automatic, did you try to start it in neutral, or make sure that it is in park fully? If that works it could be the neutral safety switch. If not, Next thing to check would be the starter. ------------------------ If your vehicle is only acting out after the vehicle has warmed up, then you probably have a sensor sending funky info to the PCM. These readings are only taken into account after the PCM/ECU/ECM, whatever, has reached closed loop. This does not necessarily mean that a sensor, valve, etc. is bad though. But rather that something is causing it to act out.
-------- also look at your TPS sensor. Use an ohmmeter on the sensor terminals and move the throttle side through it's range. The reading should increase/decrease smoothly.

Then you might do some pressure tests on your fuel system checking for leaks or lack of pressure or volume. I've seen where a fuel system would slowly lose pressure while running until the engine dies.

So start checking some of these things out .and this will give you the faulty part.also one of the best option to get the fault is get the codes checked at a car diagnosing center.most of the car garages get it done for free.they do not charge for getting the faulty codes in your car.at
www.autozone.com its free to get the car codes checked.this codes will give the exact fault in the car.so only that part has to be checked and replaced.most probably its fuel pressure getting low after car running for sometime/so fuel pressure regulator has to be checked.the fuel pump and fuel filter if getting clogged or got worn out then this can also lead such problems. this will help. ----- thanks.please do rate the solution.thank you for using fixya.keep updated.

Posted on Sep 11, 2009

  • charlymonty Sep 11, 2009

    ok got it.
    The Accelerator pedal position sensor (APPS) mounts to the top of the throttle pedal.inside of it are three position sensors and two return springs.the position sensors sends an analog digital signal to PCM.the PCM uses the APPS1 as a primary indicator of the drivers throttle demand.APPS1 uses a negative slope .in the at-reset position,APPS1'S voltage is high,usually starting around 4.0 volts.as the pedal is depressed the voltage lowers.within the paddle fully depressed the voltage value will typically read just under 1.5 volts.APPS2 is used to cross check APPS1 against.the positive slope of APPS2 provides a more traditional position sensor behavior when viewed on the scanner.the voltage reading of APPS2 starts low in rested position and rises as the pedal is depressed.in the even that APPS1 were to fail ,the PCM then looks at APOPS2 as the source of the driver demand information.if the APPS1 and 2 don't agree ,APPS3 is then used to cross check APPS1 and APPS2 against.the return spring inside the unit ,help ensure that the pedal will fully return in the event one should break or weaken.trouble codes p2122,p2133,p2127,p2128,p2132 and p2133 are APPS sensor circuit community test.these codes all points towards the open or short APPS circuit.codes p2122,p2126 and p2131 are all related to APPS performance or range.these codes are set when PCM sees a signal from one of the three APPS is present or active, but is not in the specified range .codes p2138,p2140 and code p2139 are APPS correlation codes.these are set when PCM sees a discrepancy between two or more APPS readings.all of these codes will set a ETC lamp(wrench light or fail-safe message).so the PCM and APPS has to be checked and replaced.this will help.


    click this link directly this will help a lot as most of the instructions are given it in for troubleshooting
    http://articles.d-tips.com/art8.html

  • charlymonty Sep 13, 2009

    keep updated.thanks.

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Hi

Please check the engine oil first as it might be running low, when was the oil last changed? If it’s been a long time then you need to change it as the check engine light coming on means it should be engine oil. Also when the key is turn on check fuel filler cap make sure it’s on and tight. If everything seems ok then it is PCM problem. Please go ahead and check the fuel pressure.

Please do accept the solution if the issue is resolved or else revert for further assistance.


Thanks
Rylee

Posted on Sep 11, 2009

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Hi,

Could be a trans problem but it might just be your fuel filter, or believe or not the catalitic converter or muffler if it is making a weird sound like chocking.Check if the motor isn't getting the fuel it needs then it will lose power when you try to accelerate . Hope this helps Thanks Smith.

Posted on Sep 11, 2009

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