[fordnut350]

The problem I am having is when my truck is cold. After startup, I will start driving and my truck will be down on power. It will barely reach 50 mph on the freeway with black smoke coming out of the tailpipe for about 1-2 minutes. This happens at about 1/4 throttle. If I push the peddle farther, nothing happens. Once the temp gauge gets to halfway or normal operating temp, I will get full power. If I feel the power loss, I have pulled over, turned off the truck, restarted it and the problem is gone. My truck is a 2001 F-350 crew cab long bed, 7.3 powerstroke with auto trans, 6.5" pro comp lift with 35" tires, hypertech chip and a airraid intake. I don't get a check engine light when this occurs. This will even occur on a 70+ degree day. I feel it might be some type of coolant sensor, but that is just a guess.

 

[action4478]

It could be alot of things....Make sure the EBPV is open, Have someone read the ICP pressures & EOT as it compares to ambient air temp, Make sure the connections to the valve covers are tight, Inside too.

It can be as serious as the LPOP wearing out. Does it stall after starting cold sometimes ?...

Others will have more ideas...

 

[kristopher]

I have the same thing only it happens to me at -20 degrees
I know that there is a exhaust device that ingages to speed up warm up. (its like a valve in the exhaust to bump up back press.)
now i could be wrong but i belive the exhaust press. sensor will tell it to open even if it is still cold

I know not much help just some ideas to get the gears turning
I have pulled a code (exhaust press sensor) out without a check eng light

 

[fordnut350]

It has never stalled, and the truck runs great except for the low power when cold. The problem does not seem that serious, but I like to fix things before they become real problems.

 

[action4478]

Is the oil full & fresh ?...

 

[MADVAN]

[ QUOTE ]
fresh ?...

[/ QUOTE ]

Rick
Did the oil do something bad /ubbthreads/images/graemlins/grin.gif
Cussing or something /ubbthreads/images/graemlins/grin.gif
Confused /ubbthreads/images/graemlins/bleh.gif

Bill

 

[action4478]

I should have asked if the oil was full & cute... /ubbthreads/images/graemlins/biggrin.gif

 

[fordnut350]

Yes the oil is full, and the problem continued after my last oil change. I only use Delo 15-40w and Ford filters.

 

[MADVAN]

As Rick States.
Scan for codes.
It will give a direction to go.
Possible the EOT, EBPV and sensor.

Bill