Re: aftermarket air intake
You shouldn't have any trouble with an aftermarket air intake regardless of the outside air temps. The computer uses the air intake temperature sensor as well as the mass air flow sensor to correct for changes in air temperature and the actual amount of air entering the engine.
I know there are a few companies out there making such a system but as usual K&N comes to mind. Just be careful you don't over oil the filter as the oil has a tendency to really screw with the MAF sensor. Truckperformance.com is a great place to get what you're looking for.
As I'm sure you know, diesels are tough to get warmed up but as long as your glow plugs are all working you should have no trouble at all. A block heater sure helps too!
1992 Ford Bronco
E4OD- B&M Stage 2 shift kit
Full 3" stainless Bassani Exhaust
32" BFG's/stock suspension
"No replacement for displacement."
"Our lugnuts require more torque than most Honda's produce!"