Compression Ignition Addict
Join Date: Nov 2008
Location: Central Virginia
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Not sure about your particular truck, but a lot of vehicles have the 'cold-air' vent intake located too close to the exhaust manifold -- which means that your vent air coming in from outside is really going to be much warmer than the ambient temperature.
One of Ford's better ideas, I suppose. LOL!
~ Trucker by trade ~
2008 Sterling Acterra 3-axle straight truck (240-hp Cummins ISC)
2006 International 8600 tractor (350-hp Cummins ISM)
"If I passed you on the right, you're in the wrong lane!"