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

74,155

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

98,385

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 181,369 nationwide F-150 listings starting at $1,500.

ZIP:

Ford F-150 Experts

  • #1
    OJ
    Reputation
    8,740
  • #2
    dandyoun
    Reputation
    4,480
  • #3
    tennisshoes
    Reputation
    3,010
View All

Related Models For Sale

Used Chevrolet Silverado 1500
2,149 Great Deals out of 183,298 listings starting at $1,693
Used GMC Sierra 1500
754 Great Deals out of 68,023 listings starting at $1,699
Used Dodge Ram 1500
411 Great Deals out of 10,702 listings starting at $1,500
Used Ford F-250 Super Duty
330 Great Deals out of 43,471 listings starting at $1,250
Used Toyota Tundra
438 Great Deals out of 33,697 listings starting at $1,999
Used Toyota Tacoma
551 Great Deals out of 42,058 listings starting at $2,999
Used Ford Mustang
759 Great Deals out of 42,755 listings starting at $1,300
Used Nissan Titan
192 Great Deals out of 19,522 listings starting at $2,300
Used Chevrolet Colorado
258 Great Deals out of 29,466 listings starting at $2,395
Used Ford Explorer
814 Great Deals out of 62,844 listings starting at $1,495
Used Chevrolet Tahoe
626 Great Deals out of 36,240 listings starting at $1,800
Used Ford F-350 Super Duty
345 Great Deals out of 23,624 listings starting at $2,990
Used Chevrolet Silverado 2500HD
348 Great Deals out of 29,278 listings starting at $2,650

Used Cars For Sale

2018 Ford F-150 For Sale
4,999 listings starting at $18,539
2017 Ford F-150 For Sale
67 Great Deals out of 108,214 listings starting at $15,407
2016 Ford F-150 For Sale
120 Great Deals out of 7,779 listings starting at $18,440
2015 Ford F-150 For Sale
261 Great Deals out of 9,773 listings starting at $14,675
2014 Ford F-150 For Sale
364 Great Deals out of 12,969 listings starting at $8,990

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.