Cold weather PSD help
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Joined: Nov 2003
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Cold weather PSD help
Hey guys, I'm here for the first time. Yeah I've heard about the Whooooosh. Problem is that this whoosh also represents a loss of power as the Exhaust is fed back to the engine to warm it up. Running in cold climates, Ford has decided to warm the engine up by doing this instead of a conventional thermostatically controlled radiator fan clutch. Have any of you guys installed a fan clutch or have you blocked off the radiator (like the big rigs) during cold weather? I would think this would improve the cold weather milage we all get. Any comments would be apreciated.
Post Fiend
Joined: Sep 2003
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From: Mesa AZ
I'm a pretty new PSD owner myself, so I haven't yet heard about the "whoosh" thing myself. I live in Arizona....so I rarely have to deal with very cold weather. However, I'm pretty sure the fans do have a clutch because I can spin my fan blade while the engine is off. While towing 12,000 lb trailers up a mountain in 110 degree weather....I do hear a loud noise after a couple of minutes. It sounds like a radiator fan that went into hyper drive. I've always assumed it was a thermostatically controlled fan clutch that locked up 1:1 because the engine was starting to get hot. Am I wrong? If so, does anybody know that that noise might be?
Postmaster
Joined: Feb 2002
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From: Bonney Lake, WA
I think you guys are talking about two different things.
cold runner dsl is talking about the Exhaust Back Pressure Valve, or EBPV, which closes off the exhaust on a cold engine to an extent, which is intended to warm up the engine faster. If you don't want to use it, disconnect the wiring harness that operates it. It's directly in front of the turbo, and has two wires leading to it.
gchavez is correct in his diagnosis of the sound. The fan clutch will engage when the coolant reaches a predetermined temperature.
cold runner dsl is talking about the Exhaust Back Pressure Valve, or EBPV, which closes off the exhaust on a cold engine to an extent, which is intended to warm up the engine faster. If you don't want to use it, disconnect the wiring harness that operates it. It's directly in front of the turbo, and has two wires leading to it.
gchavez is correct in his diagnosis of the sound. The fan clutch will engage when the coolant reaches a predetermined temperature.
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OK, I have a 1999 Superduty PSD, the first shipment of the Superduties in the Bangor Maine area. If there is a clutch on the fan, that's great, but I think this one runs all the time, even when the engine is cold. I'm going out to give it a look. Hey Quadzilla, thanks for the advice on the disconnect. That should do the trick. I'll look for the wiring harness and try it out. Thannks again, both of you.
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Joined: Dec 2001
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From: C H I C A G O
A company by the name of "Lund" sells a thing called the cold front. It is basically a screen that attaches over the factory Superduty/Excursion grille to limit the amount of cold air that will enter thru the grille area. I went a step further and took some heavyduty fireproof insulation and stuck it behind the screen, to block the air totally. I did leave about a 4'' wide section open to let a small amout of air into the grille.
I live just outside chicago , and it gets damn cold. Just got home and it is a bitter 26 outside. Without pluging in a diesel , it will always take awhile to get the truck warm and some decent heat out of the vents , but the blocking of the grille DOES make a pretty big difference in the cold weather............
I live just outside chicago , and it gets damn cold. Just got home and it is a bitter 26 outside. Without pluging in a diesel , it will always take awhile to get the truck warm and some decent heat out of the vents , but the blocking of the grille DOES make a pretty big difference in the cold weather............
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