03 7.3L No Power When cold - Ford Powerstroke Diesel Forum
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post #1 of 12 Old 11-08-2009, 04:10 PM Thread Starter
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Arrow 03 7.3L No Power When cold

I am trying to help my neighbor with his 03 F250 7.3 L PowerStroke superduty truck. He has no power at all when it is cold ie; barley moves. Truck has to idle for 20 to 30 minutes before he can drive it. By cold I mean 45 degrees outside...not freezing. After it warms up, it drives fine.

I have read that EBPV (exhaust back pressure valve) could be the culprit, but not sure how to test it, and where it is located. Any help or suggestions or ideas will be greatly appreciated.

As for me,10 yrs ago I was an ASE cert tech, with a degree in auto repair, but I have done very little work on diesel's. I do have tools and understand the righty tighty theory.. well maybe a little more than that, but some of it is a little fuzzy now.
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post #2 of 12 Old 11-08-2009, 04:21 PM
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does it smoke alot on start up


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post #3 of 12 Old 11-08-2009, 05:47 PM Thread Starter
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No, no excessive smoke
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post #4 of 12 Old 11-08-2009, 07:49 PM
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Unplug the EBPV electrical sensor (look in the valley of the motor, plugged in at the turbo pedistal). Try that out and get back to us.
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post #5 of 12 Old 11-08-2009, 07:51 PM
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I am having the same problem with my 97. It acts like there is an exhaust brake on until the engine gets warm. ??? I need help with this one.
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post #6 of 12 Old 11-10-2009, 12:50 PM
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i have the same problem with my 2000 7.3 psd its gutless after it warms up
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post #7 of 12 Old 11-11-2009, 09:06 AM
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For a lot of you if there is a loud hissing sound while its warming up and it acts gutless then its your EBPV staying shut. There are several ways to fix this. 1. simply unplug it. 2. Do the exhaust brake mod. 3. Delete it all together.

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Thanks. I'll give er a good wackin in the morning.
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post #8 of 12 Old 11-11-2009, 10:29 AM
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So where exactly is this plug to unhook the EBPV? Does it matter when you unplug it?..meaning does the motor need to be warm so it will stay in the position that it should be when warm? I'd like to do this cause mine is doing strange things. Is this something I'm going to have to climb into the engine compartment or hire my triple jointed circus performer friend to come over and help me with? haha. Basically is this fairly easy to do? thanks.

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post #9 of 12 Old 11-11-2009, 11:27 AM
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Quote:
Originally Posted by cblackb View Post
So where exactly is this plug to unhook the EBPV? Does it matter when you unplug it?..meaning does the motor need to be warm so it will stay in the position that it should be when warm? I'd like to do this cause mine is doing strange things. Is this something I'm going to have to climb into the engine compartment or hire my triple jointed circus performer friend to come over and help me with? haha. Basically is this fairly easy to do? thanks.
There are no side affects of unplugging the EBPV. It will just always stay open. The plug is on the front of the turbo pedestal and is very easy to unplug.

Very easy IMHO

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Thanks. I'll give er a good wackin in the morning.
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post #10 of 12 Old 11-11-2009, 11:29 PM
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Quote:
Originally Posted by sk2853 View Post
I am trying to help my neighbor with his 03 F250 7.3 L PowerStroke superduty truck. He has no power at all when it is cold ie; barley moves. Truck has to idle for 20 to 30 minutes before he can drive it. By cold I mean 45 degrees outside...not freezing. After it warms up, it drives fine.

I have read that EBPV (exhaust back pressure valve) could be the culprit, but not sure how to test it, and where it is located. Any help or suggestions or ideas will be greatly appreciated.

As for me,10 yrs ago I was an ASE cert tech, with a degree in auto repair, but I have done very little work on diesel's. I do have tools and understand the righty tighty theory.. well maybe a little more than that, but some of it is a little fuzzy now.
might want to check fuel psi. there is a schraeder valve at the fuel filter you can plug into, you should have at least 60 psi. is there any knocking or misfires at first start up?


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