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

1 Answer

Sergey Arustamov

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

Add photo

Related Questions

  • 1987 ranger 2.4 when it hits running temp sounds like the engine is choking itself 25 answers

    just what the topic says i thought it could be the distrubuter and cap but i replaced the distributer cap and roter. all of the spark plugs and wires are new. tried running fuel injecter cleaner throu...

    1987 Ford Ranger


    Maintenance & Repair

  • troubleshooting high idle/1994 ford ranger 2/3L 1 answer

    started after sub zero temps an immediately had extreme high idle that makes truck do 38mph without touching pedal. have cleaned iavc and maf sensor

    1994 Ford Ranger XLT Standard Cab LB


    Maintenance & Repair

  • 97 Ranger 1 answer

    97 Ranger wants to cut off or idle down while stopped at redlights on cold mornings. Only happens while in gear and quits after truck warms up really good or temp rises. Anyone else experience this ...

    1997 Ford Ranger


    Maintenance & Repair

  • high idle 5 answers

    my 96 has a 2.3 when i pull up to a light and push in the clutch it idles high for a couple seconds then stops ...its like the throttle is getting stuck..any ideas to what it is??

    1996 Ford Ranger XLT Extended Cab SB


    Maintenance & Repair

  • temp gauge 1 answer

    temp. gauge goes hot when started. only when cold. engine idles rough. when hot everything is normal.

    2003 Ford Explorer XLT V6


    Maintenance & Repair

Search Ford Ranger Questions

Ford Ranger Experts

#1 FordNut
Reputation 1,330
#2 tennisshoes
Reputation 940
#3 Tracy Hooks
Tracy Hooks
Reputation 670
View All

Related Models For Sale

Used Ford F-150"
3,181 Great Deals out of 216,384 listings starting at $1,900
Used Toyota Tacoma"
639 Great Deals out of 30,203 listings starting at $2,850
Used Nissan Frontier"
427 Great Deals out of 20,610 listings starting at $2,500
Used Chevrolet S-10"
11 Great Deals out of 1,819 listings starting at $1,749
Used Chevrolet Silverado 1500"
2,466 Great Deals out of 143,823 listings starting at $1,995
Used Dodge Dakota"
163 Great Deals out of 4,814 listings starting at $900
Used Dodge Ram 1500"
515 Great Deals out of 13,811 listings starting at $995
Used Jeep Wrangler"
441 Great Deals out of 16,282 listings starting at $3,400
Used Ford Mustang"
717 Great Deals out of 41,260 listings starting at $900
Used GMC Sierra 1500"
1,023 Great Deals out of 56,281 listings starting at $2,499
Used Toyota Tundra"
611 Great Deals out of 26,498 listings starting at $2,500
Used Ford Explorer"
1,336 Great Deals out of 71,679 listings starting at $300

Used Cars For Sale

2011 Ford Ranger For Sale
75 Great Deals out of 1,430 listings starting at $4,500
2010 Ford Ranger For Sale
25 Great Deals out of 568 listings starting at $4,495
2009 Ford Ranger For Sale
26 Great Deals out of 484 listings starting at $3,495
2008 Ford Ranger For Sale
32 Great Deals out of 595 listings starting at $2,699
2007 Ford Ranger For Sale
19 Great Deals out of 405 listings starting at $3,298