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6.4L Power Stroke Diesel Engine fitted to 2008 - 2010 F250, F350 and F450 pickup trucks and F350 + Cab Chassis

Constant limp mode, Please help

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Old Mar 3, 2013 | 12:31 PM
  #16  
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Originally Posted by 08powerjoke
Thanks I hope u don't have problems. I had to delete dpf cause it clogged completely,so I also had to get a tuner so I chose sct tuner, just replaced egr valve, had to replace radiator which is $900 dealer only. It's every week I have to put 100 here or 300 there into it, it's pitiful.
Why wouldn't you want to get rid of the DPF/DOC? That was the first thing I did and the result was an additional 10mpg and 500 degrees lower EGT's. The radiator isn't dealer only. Mine was $788, you got ripped.
Whether you like it or not it was good that these items went out it actually saved you money on DD costs and the coolant should be replaced @ 100k anyways. If you want to talk about repair bills go buy a first gen 6.0 ha.
 
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Old Mar 3, 2013 | 12:35 PM
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Any idea what hpfp is gonna cost me ?
 
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Old Mar 3, 2013 | 12:36 PM
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My 6.4 has been very good. I have 77K on it and it runs great. Got to do the maintance. Got to check your fluids all the time.

that is what I do and has served me well.

Still have my orginal radiator too.
 
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Old Mar 3, 2013 | 12:41 PM
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Originally Posted by 08powerjoke
Any idea what hpfp is gonna cost me ?
How do you know that is your issue? What codes appear. Limp mode could mean a few different things. It is a powertrain protection mode..so it could be a transmission issue or an EGR issue.

Who have you taken it to that they have no idea what is wrong? Did you take it to a service dealer who knows about diesels? A Ford dealer? Did you take it to someone who has the proper equipment to access the PCM and see what codes there were?
 
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Old Mar 3, 2013 | 12:42 PM
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Originally Posted by 08powerjoke
Any idea what hpfp is gonna cost me ?
Well, before we say that is the problem what codes are being thrown?
The hpfp is the last resort because it is a cab off repair and costs around $3500. Not many can do this repair in there driveway.
 
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Old Mar 3, 2013 | 12:44 PM
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Originally Posted by senix
How do you know that is your issue? What codes appear. Limp mode could mean a few different things. It is a powertrain protection mode..so it could be a transmission issue or an EGR issue.

Who have you taken it to that they have no idea what is wrong? Did you take it to a service dealer who knows about diesels? A Ford dealer? Did you take it to someone who has the proper equipment to access the PCM and see what codes there were?
X2,
08powerjoke you said you bought the SCT go check for codes.
 
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Old Mar 3, 2013 | 12:47 PM
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Originally Posted by duceswild85
X2,
08powerjoke you said you bought the SCT go check for codes.
Ok give me 20 min or so and I'll check for codes. I have a 2 year old I'm trying to put down for nap. Lol
 
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Old Mar 3, 2013 | 01:00 PM
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Originally Posted by 08powerjoke
Ok give me 20 min or so and I'll check for codes. I have a 2 year old I'm trying to put down for nap. Lol
I hear ya, just write them all down then delete them. Let us know what you got. The next time it falls into limp mode think about what you were doing. Like we're you pulling a hill, were you on the throttle hard, warm/cold and so on.
 
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Old Mar 3, 2013 | 01:31 PM
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Originally Posted by duceswild85
I hear ya, just write them all down then delete them. Let us know what you got. The next time it falls into limp mode think about what you were doing. Like we're you pulling a hill, were you on the throttle hard, warm/cold and so on.
Ok got 2 codes.
P2123 throttle pedal position sensor switch D circuit high.
P1000 systems readiness test not complete.
I cleared them but still got wrench on the dash so still in limp mode. Limp mode used to come on after truck was warm not towing or anything. Then I would shut truck off and it would go away, but would come back after little while. Now it's just stuck on. I disconnected batteries for an hr but that didnt work either. Do u know how to fix what codes say? Don't know what readiness test is.
 
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Old Mar 3, 2013 | 01:35 PM
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The p1000 is nothing it will go away on its own
 
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Old Mar 3, 2013 | 01:39 PM
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Originally Posted by senix
The p1000 is nothing it will go away on its own
I the other code just a simple sensor to replace? If so do u know where it's located on truck ? Ha ha I said simple !
 
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Old Mar 3, 2013 | 01:42 PM
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the other one is a sensor. I will have to look into that more. But my guess is on the throttle body.

Since you cleared the codes but the wrench is still on it may or maynot be in limp mode.

Getting ready to go to a function for my youngest right now but I can look later and try to locate it for you.

Google may help.
 
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Old Mar 3, 2013 | 01:46 PM
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Originally Posted by senix
the other one is a sensor. I will have to look into that more. But my guess is on the throttle body.

Since you cleared the codes but the wrench is still on it may or maynot be in limp mode.

Getting ready to go to a function for my youngest right now but I can look later and try to locate it for you.

Google may help.
Great thanks, it is in limp mode. I'll be searching google let me know if you come up with any ideas, and thanks alot !!
 
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Old Mar 3, 2013 | 03:54 PM
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Originally Posted by 08powerjoke
Great thanks, it is in limp mode. I'll be searching google let me know if you come up with any ideas, and thanks alot !!
It will fall in to limp mode if the pedal sensor isn't sending the proper signal. The throttle sensor is the pedal assembly. I believe it's sold as a unit. If you look at your throttle pedal you will see the sensor.
 
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Old Mar 3, 2013 | 04:00 PM
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It looks like it is separate and costs about $55.
 
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