Fan Runs When Door Opened
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Senior User
Joined: Jul 2004
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Fan Runs When Door Opened
2018 2.7 SCrew
I have noticed recently that when i open the driver door of the truck when it is not running the fan will kick on for 30 seconds or so. Never noticed it when new, have about 56k on it now. Is this normal? Anyone else notice?
I have noticed recently that when i open the driver door of the truck when it is not running the fan will kick on for 30 seconds or so. Never noticed it when new, have about 56k on it now. Is this normal? Anyone else notice?
Lead Driver
Joined: Dec 2016
Posts: 5,650
Likes: 243
From: GA
Never heard of that happening before but I’m very interested in hearing from other owners of the 2.7.
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Senior User
Joined: Jul 2004
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Fuel pump would make more sense but it sure sounds like a fan. I've never actually popped the hood and looked, it's just been a little annoying observation in my mind. I'll pop the hood and dig a little deeper. Thanks.
FTE Community Team
Joined: Jan 2019
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I'll be interested to know what you find.
Logistics Pro
Joined: Jul 2006
Posts: 4,512
Likes: 18
From: Detroit
Quote from a post in the thread below from forum member ford390gashog:
"Just so it's clear, the 5.0 also has the same direct injection and port injection for 2018. All engines do except the 3.3. The prime on door open allows the fuel system to bleed down which prevents the early failure of the HPFP shaft seal. Conversely the pump needs fuel immediately or else it will destroy itself from a dry start. Being tied to the door it gives the truck time to actuate the pump before the key is turned. The delay was not built in to the key because of a possible nuisance delay situation. Also if you remote start a 2018 there is a delay for the fuel pump built into the strategy. This is how it was explained to me by a Bosch systems engineer during a trade event. Other manufacturers are doing it also."
https://www.ford-trucks.com/forums/1...ng-door-3.html
"Just so it's clear, the 5.0 also has the same direct injection and port injection for 2018. All engines do except the 3.3. The prime on door open allows the fuel system to bleed down which prevents the early failure of the HPFP shaft seal. Conversely the pump needs fuel immediately or else it will destroy itself from a dry start. Being tied to the door it gives the truck time to actuate the pump before the key is turned. The delay was not built in to the key because of a possible nuisance delay situation. Also if you remote start a 2018 there is a delay for the fuel pump built into the strategy. This is how it was explained to me by a Bosch systems engineer during a trade event. Other manufacturers are doing it also."
https://www.ford-trucks.com/forums/1...ng-door-3.html
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Senior User
Joined: Jul 2004
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Did some investigating, it’s definitely the radiator fan. Only occurs when the motor is cold and is only the driver door. Fan runs for almost 3 minutes and shuts off. Really weird. I tuned the truck a couple months ago. Wondering if it started then.
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Tuned
Joined: Nov 2015
Posts: 323
Likes: 32
That's definitely a problem. Sounds like the tuner guys programmed the wrong pin for the fan instead of the fuel pump. Hopefully the pump is also priming so it's not being fired dry. I'd give give them a call for sure.
Lead Driver
Joined: Dec 2016
Posts: 5,650
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From: GA
Have you tried removing the tune and going back to stock to see if that solves the issue?
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Senior User
Joined: Jul 2004
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SCT BDX tuner, 93 octane pre load. I called them, they've of course never had this issue. Told me to monitor the air-fuel ratio on the handheld when starting to see it its in parameters. Will do tonight.
Logistics Pro
Joined: Jul 2006
Posts: 4,512
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From: Detroit
Good news. Makes me that much more concerned that someone's flaky tune will do something to really kill your vehicle.
Fleet Mechanic
Joined: Feb 2017
Posts: 1,597
Likes: 83
From: N. Texas
I've been running a tune for almost 30K miles with absolutely no issues. Granted a different tune than the OP.