Question about 1998 Ford Ranger SuperCab

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1998 ford ranger runs cool has new radiator gage show engine cooling at high idle

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This isn't unusual for an engine that is tight compression-wise but higher mileage. If friction is low, and the cooling system good, this reduces the amount of heat resulting.
I use a molybdenum-based oil additive and it brings friction down (and mileage up) enough so that a car I owned some years ago used to drop substantially (dropping 2/3 of the uncalibrated gauge) rolling down a long slope during the commute to work. This happened after the engine passed through 150,000 miles.   

Posted on Feb 24, 2009

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Overheating when I sit idle.


Over heating the engine is a serious concern. With the hood raised you should hear the motorized fan turn on just behind the radiator as the engine requires additional cooling.. If you look in from the rear of the radiator you should see the fan blades.

This electric powered motor operates on a thermostat and when the engine temperature rises this fan should come on. I'm assuming from your description that when driving and air is flowing through the radiator as the car travels the engine is nor overheating.

Check fan motor thermostat, check fan motor and check wiring.

Wiring Diagrams related to the Honda Civic
http://www.wiringdiagrams21.com/category/automotive/honda-automotive/civic

Motor engine cooling fan only runs as engine temperature requires additional cooling.
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Jan 05, 2016 | 2001 Honda Civic

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Temperature gage goes up and down


The breather hose should run to the air cleaner housing or intake tube.
Check your radiator cooling fan. If it isn't working the car will run hot at slow speeds or idle then cool down after you get going faster. A quick check would be to turn the AC on and see if the fan comes on. If not try lightly tapping on the cooling fan motor with a wooden broom handle. If it comes on then you have a bad motor.
If the fan comes on with the AC then check to see if the fan comes on after the engine gets hot. If the engine temp doesn't kick it on then the temperature sensor might be bad.
If the fan is ok please post more info on your problem

May 27, 2012 | 2002 Ford ZX2

1 Answer

Takes a long time to make heat. Has a new 195 thermostat.Temp gage never goes above 130 however my no touch laser temp gage shows 171 on top hose when warmed up


Hello! I believe you have an air bubble blocking the thermostat...Since you just changed it, the cooling system needs to be blead of trapped air...Start the engine with the radiator cap off, heat on high and let the engine run until all air has escaped...Slowly add 50/50 until all air is expelled and radiator is topped off...Replace the cap with a new one...Send a comment...Guru...saailer

Dec 20, 2010 | 1989 Ford Mustang

1 Answer

83 ford ranger no heat ,new heater core,thermostat,blower motor,runs at normal temps,noticed one heater hose very hot yet the other one which is ran into a metal line going to the engine or ekg valve is...


it sounds like you have a air blockage, or the cooling system needs flushed. to flush system go to ( autorepair.about.com/od/regularmaintenance/ss/coolant_f...) click on 3rd one down. remember to bleed air out of system, this works the best. turn heater and blower on high, start adding coolant. start car let it idle till radiator thermostat opens. when top radiator hose gets hot you should have heat. some vehicles have a bleeder to let air from system. when filling putting coolant in system. if it does, then open bleeder while engine running and putting in coolant untill there are no air bubbles coming out. have a good day !! when doing flush if need be. you can go to any auto parts store and buy radiator flush. follow directions on the back ( prestone is best )

Dec 11, 2010 | 1983 Ford Ranger

2 Answers

My 1998 ford taurus overheats when idling but cools down when you drive what should I do?


Check your your radiator cooling fan should come on at about 220 deg. and off at about 210 deg. at idle with a/c off, if it stats to over heat turn a/c on, fan should come on right away, if it dont check voltage at fan motor, if you do have voltage, you have a bad radiator fan motor, more then likely the reason it don't over heat while driving is air is being push through radiator where it cool's the coolant before it goes back into the engine, at stop's no air running through and never cool's coolant .

Jun 26, 2010 | 1998 Ford Taurus

1 Answer

1998 ford ranger idles rough, high then low


does car have engine codes? sounds like your idle air controle valve is sticking. or possible egr problem

Feb 18, 2010 | 1998 Ford Ranger SuperCab

1 Answer

Have to replace water pump on 98 Ford Taurus. Any hints or suggestions would be appreciated before I get out in the snow and cold to fix this.


You can change the water pump by doing these steps:

  • With the engine off and cold, o pen the hood and locate the vehicle’s radiator and water pump.
  • Remove the radiator cap.
  • Install a pressure tester on the radiator. Apply the pressure indicated on the radiator cap or in the owner’s manual.
  • Inspect the water pump for leaks. Remove the pressure tester.
  • Place a drain pan under the radiator. Open the drain valve or remove the lower radiator hose to drain the cooling system.
  • Remove the drive belts or serpentine belt.
  • Remove any hoses connected to the water pump.
  • Unbolt the water pump from the engine. Remove the water pump.
  • Using a gasket scraper, clean the mounting surface on the engine block.
  • Install a new gasket and attach the new water pump to the engine with the original mounting bolts. Tighten the bolts to the manufacturer’s specifications.
  • Re-install any hoses and belts that were removed.
  • Re-install the drain plug or lower radiator hose.
  • Refill the radiator with a 50/50 mix of coolant and distilled water. Pressure test the cooling system and check for leaks.
  • Check and fill the overflow reservoir with coolant.
  • Leave the radiator cap off and start the engine. Idle the engine to remove trapped air from the cooling system. Add coolant if necessary.
  • Install the radiator cap.
  • Road test the vehicle and monitor the temperature gauge. If the vehicle runs hot, there may be an air pocket in the cooling system. Allow the engine to cool off and add the necessary coolant.

Feb 12, 2010 | 1998 Ford Taurus

1 Answer

1993 honda lx run cool while running ,but after it


check thermostat might be sticking or radiator may need flushing if it only heats up while idling check your electric fan may not be coming on try turning on the a/c the 2 cooling fans should come on then if they do then i would check the cooling fan switch if they do not come on when the a/c is switch on you may have a bad electric fan motor or wiring to the fan or fan relay

Feb 26, 2009 | 1993 Honda Accord

1 Answer

1998 ford ranger 4.0 liter auto. runs hot while driving and cool while at idle. i have changed thermostat and fan clutch. ANY IDEAS?


You could benefit from a tow package upgrade including a tranny cooler if you don't already have one. You might want to pressure test the radiator, those things aren't immortal, and depending on where you live and how you drive, 10 years on a radiator is pretty good. seriously, pressure test the cooling system and go from there.

Aug 05, 2008 | 1995 Ford Ranger Supercab

1 Answer

Engine overheating


No water pump issues I am aware off, are you sure you bled the air out of the cooling system? If not fill the overflow bottle all the way full, then use a floor jack and raise the front of the car as high as you can ( this allows air to go to top of radiator tank), then run the engine at high idle speed until the cooling fan ( I assume the fan works OK?) comes on, but avoid letting the engine get into the overheat area of the guage, if it does turn it off, run water over the radiator until it cools, check the tank and radiator, top off if you need to and repeat above procedure, if this doesn't work you have some other problem like no or little flow in radiator.

Jul 27, 2008 | Ford Escort Cars & Trucks

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