I have a 2000 Ford Ranger and the engine temp fluctuates greatly.

Asked by Feb 01, 2014 at 10:47 PM about the Ford Ranger

Question type: Maintenance & Repair

The temp stays close to normal until I turn the heat on,as soon as heat is turned on the engine temp drops to almost cold start temp,..cut heat off and the engine temp goes back to normal and heat barely gets even remotely warm. I have changed the thermostat,flushed the radiator and changed antifreeze,can it be something besides heater core before I tackle that job?

3 Answers

89,035

Sounds like you have a defective thermostat, make sure it is the proper temp for your application.

107,655

Check the hoses going to the heater core. (Check when truck is at operating temp). Are both hoses hot? If so core is ok. Is one hose hot and the other cold(or much colder than the other)? Heater core is stopped up. Are both cold or Luke warm? Coolant system issue. Low coolant, wrong or faulty thermostat or air in the cooling system.

18,905

Replace the water pump. The fins are eat off of the inside causing no heat.

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

  • 2000 ford ranger xlt 4X4, 3.0 flex fuel question, knocking noise 1 answer

    I have a 2000 ford ranger xlt 4X4 and recentally the engine started knocking, oil was fine, the oil pressure is jumpy, cant stay in one spot, the needle on the gauge keeps jumpin around when idling, w...

    2000 Ford Ranger XLT Extended Cab Stepside 4WD SB

    -

    Maintenance & Repair

  • I have a 2000 ford ranger 6 cylinder 3.0 L with a/, replacing my third radiator hose 2 answers

    I recently had a fender bender, and afterwards, found a crack in the radiator. Took it to a mechanic had the radiator replaced. He mentioned that when it overheated there was damage to the head g...

    2000 Ford Ranger XL Extended Cab SB

    -

    Maintenance & Repair

  • Ford ranger 1990 2 answers

    Just bought a 1990 for ranger with manual 5 speed Tranny. Drive great for 5 days and then wouldn't start. Will crank over but no fire. After I stop cranking I can hear and see fuel hitting the groun...

    1990 Ford Ranger S Standard Cab SB

    -

    Maintenance & Repair

  • old starter had two wires , new one needs 3? 30 answers

    2000 ranger 4 cylinder,2.5l manual 2wd. Starter went out, replaced with a new one by autozone , the starter spins but will n8t engage. Bench tested on vehicle bendex does not plunge. Took it to auto...

    2000 Ford Ranger XL Standard Cab LB

    -

    Maintenance & Repair

  • Oil Pressure, Amp, and Temp Gauge 6 answers

    I'm trying to install an aftermarket Oil Pressure, Amp, and Temp Gauge in my 1986 ford ranger 2.9L V6. I've installed the temp just fine. The oil pressure guage I CAN NOT figure out where to put in my...

    1986 Ford Ranger

    -

    Car Customization

Ranger

Looking for a Used Ranger in your area?

CarGurus has 6,179 nationwide Ranger listings starting at $1,300.

ZIP:

Search Ford Ranger Questions

Ford Ranger Experts

#1 tennisshoes
tennisshoes
Reputation 1,240
#2 Tracy Hooks
Tracy Hooks
Reputation 780
#3 Tom Demyan
Tom Demyan
Reputation 740
View All

Related Models For Sale

Used Ford F-150
2,401 Great Deals out of 210,254 listings starting at $895
Used Toyota Tacoma
544 Great Deals out of 37,483 listings starting at $2,807
Used Chevrolet Colorado
224 Great Deals out of 22,361 listings starting at $2,000
Used Nissan Frontier
382 Great Deals out of 25,987 listings starting at $890
Used Chevrolet S-10
3 Great Deals out of 1,393 listings starting at $1,995
Used Chevrolet Silverado 1500
1,981 Great Deals out of 160,213 listings starting at $1,995
Used Dodge Dakota
102 Great Deals out of 3,896 listings starting at $1,500
Used Dodge Ram 1500
443 Great Deals out of 11,388 listings starting at $700
Used Jeep Wrangler
284 Great Deals out of 18,942 listings starting at $3,295
Used Ford Mustang
333 Great Deals out of 45,576 listings starting at $2,000
Used GMC Canyon
102 Great Deals out of 7,418 listings starting at $2,950
Used GMC Sierra 1500
892 Great Deals out of 64,401 listings starting at $1,500
Used Ford Explorer Sport Trac
67 Great Deals out of 1,975 listings starting at $2,000
Used Toyota Tundra
523 Great Deals out of 32,139 listings starting at $2,995
Used Ford Explorer
750 Great Deals out of 74,481 listings starting at $750