Weather tempature
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Joined: Feb 2009
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Weather tempature
I have a 1999 F-250 Ford Diesel. I live on the MS Gulf Coast the tempature and humidity is usually pretty hot but when it gets below 50 degrees the truck will not run worth a crap. Even when the truck warms up it does not change the performance, but when the actual weather warms up it will run fine. I want to think its some type of sensor but I really just don't know. If anyone has an idea please let me know what it might be.
Thanks, tannebi
Thanks, tannebi
New User
Joined: Feb 2008
Posts: 15
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From: Fort St John BC Canada
Weather temps
Find a chart that shows specific humidities with there freezing points are. I suspect iciing maybe fouling the mass air flow? or pressure MAPS or freezing in the intercooler if you have one? Hope this helps.
Lead Driver
Joined: Sep 2007
Posts: 8,180
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From: Scio, OR
First off, you might want to try the 1999-2003 7.3L forum. They know a lot about that engine there.
https://www.ford-trucks.com/forums/forum31/
Second, I would be looking at the Intake Air Temperature sensor. Perhaps it is not reading colder air and compensating for it. I don't know if the 7.3 had a barometer sensor but if it does you might want to look at that too.
https://www.ford-trucks.com/forums/forum31/
Second, I would be looking at the Intake Air Temperature sensor. Perhaps it is not reading colder air and compensating for it. I don't know if the 7.3 had a barometer sensor but if it does you might want to look at that too.
