My 2008 F150 King Ranch will not start when it get's below 20 degrees--works fine when warmer outside. New battery and cranks fine--thoughts?

Asked by Jan 19, 2016 at 09:05 PM about the 2008 Ford F-150 King Ranch SuperCrew SB

Question type: Maintenance & Repair

When we tried to start it the other day after sitting outside in 15 degree temp--
no go.  Towed it to the garage, it sat inside and 5 hours later started right up.  
Any ideas?

4 Answers

76,905

Yes - add a block heater and if you can, park it in a garage at night.

100,525

I have seen a few of these have sensor misreads so the computer is getting a wrong reading so it is setting the systems too lean to start the truck cold. I had 1 rig that the sensor grounds had disappeared and the sensors were combining readings so the ECM was trying to average them out to make the truck run, it did run but badly and no codes were present and there should have been, so I recommend getting a good system code reader, one that has live data with freeze frame capabilities would prove very valuable in diagnostics on this truck.

40

A Block Heater is a must and if you can get a truckers blanket and cover it at night. Also check relays.

40

As temps. drop the resistance of the primary circuit reduces rapidly so at 20 degrees the instantaneous current increases. At subzero temps. a temperature controlled resistance introduced into the ignition primary circuit has successfully solved this problem

Your Answer

F-150

Looking for a Used F-150 in your area?

CarGurus has 184,001 nationwide F-150 listings starting at $699.

ZIP:

Ford F-150 Experts

  • #1
    OJ
    Reputation
    8,940
  • #2
    dandyoun
    Reputation
    4,550
  • #3
    tennisshoes
    Reputation
    3,070
View All

Related Models For Sale

Used Chevrolet Silverado 1500
2,087 Great Deals out of 166,143 listings starting at $1,900
Used GMC Sierra 1500
858 Great Deals out of 65,197 listings starting at $2,495
Used Ford F-250 Super Duty
362 Great Deals out of 44,690 listings starting at $1,799
Used Dodge Ram 1500
352 Great Deals out of 10,845 listings starting at $1,500
Used Toyota Tundra
442 Great Deals out of 32,126 listings starting at $1,999
Used Toyota Tacoma
639 Great Deals out of 42,801 listings starting at $1,500
Used Ford Mustang
689 Great Deals out of 37,936 listings starting at $895
Used Nissan Titan
209 Great Deals out of 19,954 listings starting at $3,495
Used Chevrolet Colorado
278 Great Deals out of 31,424 listings starting at $1,995
Used Chevrolet Silverado 2500HD
312 Great Deals out of 28,972 listings starting at $3,550
Used Ford F-350 Super Duty
324 Great Deals out of 24,240 listings starting at $2,488
Used Chevrolet Tahoe
666 Great Deals out of 39,526 listings starting at $1,000
Used Ford Explorer
840 Great Deals out of 63,765 listings starting at $1,000

Used Cars For Sale

2018 Ford F-150 For Sale
35,842 listings starting at $19,355
2017 Ford F-150 For Sale
127 Great Deals out of 77,420 listings starting at $17,989
2016 Ford F-150 For Sale
115 Great Deals out of 7,782 listings starting at $18,989
2015 Ford F-150 For Sale
299 Great Deals out of 10,877 listings starting at $15,995
2014 Ford F-150 For Sale
431 Great Deals out of 13,878 listings starting at $10,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.