Temp fluctuations in my 99 ford ranger 4.0, from normal running temp to high temp. But temp stays normal at idle.

Asked by May 16, 2015 at 10:50 AM about the 1999 Ford Ranger

Question type: Maintenance & Repair

Replaced heater valve. And refilled the
system

1 Answer

155

Your problem probably is thermostat.In idle mode its make antifreeze run,when thermostat in a close position,on small circuit to heat engine faster,but when temperature of coolant reach preset level (each car have a different setting) thermostat will opens and let coolant run on full circuit what allow to cool your engine in full capacity.Try to replace thermostat.

Your Answer

Ford Ranger Experts

  • #1
    tennisshoes
    Reputation
    1,520
  • #2
    F_O_R
    Reputation
    1,000
  • #3
    Bob Beaman
    Reputation
    910
View All

Related Models For Sale

Used Toyota Tacoma
550 Great Deals out of 41,421 listings starting at $2,500
Used Ford F-150
3,046 Great Deals out of 230,457 listings starting at $1,300
Used Nissan Frontier
438 Great Deals out of 25,198 listings starting at $1,400
Used Chevrolet Silverado 1500
2,684 Great Deals out of 157,093 listings starting at $1,000
Used Chevrolet S-10
9 Great Deals out of 1,187 listings starting at $950
Used Dodge Dakota
82 Great Deals out of 3,459 listings starting at $1,475
Used Dodge Ram 1500
325 Great Deals out of 10,738 listings starting at $1,988
Used Jeep Wrangler
362 Great Deals out of 20,473 listings starting at $2,500
Used Ford Mustang
341 Great Deals out of 42,379 listings starting at $1,488
Used GMC Sierra 1500
1,120 Great Deals out of 61,756 listings starting at $1,295
Used Toyota Tundra
627 Great Deals out of 36,312 listings starting at $1,500
Used Ford F-250 Super Duty
442 Great Deals out of 47,647 listings starting at $695

Used Cars For Sale

2011 Ford Ranger For Sale
29 Great Deals out of 753 listings starting at $3,988
2010 Ford Ranger For Sale
19 Great Deals out of 387 listings starting at $2,900
2009 Ford Ranger For Sale
9 Great Deals out of 278 listings starting at $3,495
2008 Ford Ranger For Sale
13 Great Deals out of 390 listings starting at $3,399
2007 Ford Ranger For Sale
14 Great Deals out of 274 listings starting at $1,999

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.