Question about 2004 Ford Super Duty F 450

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2004 F-450 power stroke diesel, sometimes it won't turn over when you turn the key. It has a automatic transmision,if I shift it to drive then back to park,it will usually crank.Once it cranks and runs it usually does fine. I do know the motor was replaced before we bought it.I paid a dealership almost 800.00 dollars to check everything and service it before driving it home.

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It may be a fault with the gear selector ignition isolation switch on the side of the transmission. As a safety measure the vehicle cannot be started when the gear selector is in anything other than park (maybe neutral). If the linkage between the gear selector and the selector switch on the transmission is a bit slack or the switch on the transmission is faulty the ignition might be disabled as it assumes it is actually left in gear. Check the this selector switch and the shift linkage to it. I think the fault might be easy to correct with adjustment, clean up or exchange

Posted on Aug 24, 2010

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Jerry, Drive to a good shop. So many things can cause reduced power light unfortunately. The first step would be to get the truck hooked up to a scanner/computer and have the computer scanned for trouble codes. One thing that you could try is to drain the water from the water separator that is mounted on the frame under drivers front door. If the PCM picks up on water, power is reduced until water is removed/drained. It could be an exhaust sensor that is reading faulty. Unfortunately from here its impossible to tell you exactly what the fault is because there are just so many engine sensor inputs that could cause your problem. Check the attached links, forums,instruction and guides, Good luck
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My transmission in my 1996 Chevy 4x4 k2500 jerks real.bad when shifting into 2nd gear and as the engine heats up it won't shift at all?????PLEASE HELP!!!!


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1 Answer

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1 Answer

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in the first place you must change the filter and the transmission oil in your automatic gear box , if the problem persists and your gear box shift not the gear for climbing hills it is a tehnycal problem with your gear box , but in my opinion ( i had a similar problem with my car ) this is the only problem. God help You ! Sorry for my English !

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1 Answer

My 2002 dodge 2500 diesel automatic shutters when shifting 3-4th


Hello.
Yes your corect,,,, i would look at the TPS, If there was more things going on i would look into the transmission, And you kno what a lot of people make this error and after spending 4 grand on a transmision it still does it,Yikes!,,,,,,,,,,, I inclosed a link you can read where i wrie at that will give you tips and tricks on the diesel and the driveline. Let me know if i can help more!
http://www.dieselgiant.com/dodge_diesel_maintenance_tips.htm
Thanks

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1 Answer

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Check to see if your air is getting through the turbo alright, sometimes a simple thing like a blocked airfilter can cause symtoms such as what you describe, failing that I would get your Diesel pump checked out, that may have a slight blockage. As an afterthought, have you checked your diesel filter(s) and fuel lines, they may need cleaning out as well. That may cause the rough running until the diesel warms up and flows better through the fuel lines.

Hope that helps.

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