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Need advice

20 messages,  Last post on Jan 01, 2011 at 2:09 PM

You are in the Ford F-Series Forum.

What is this discussion about? Ford F-150, Ford F-250, Ford F-350, Car Comparisons, Truck

Messages Page 2 of 2

#11 of 20 NO HEAT AND CANT FIGURE IT OUT by dnjsyl

Oct 03, 2010 (4:23 am)

Hello, i have a 1998 F150, 4.6, auto,2 wheel drive. The air works fine, and the blend door does not appear to be broken. I have flushed the heater core out and it does not leak on the floor.The hoses get hot, well one gets real hot and the other gets pretty warm. I will get warmer air when i put heat on, but dont get hot air. I replaced the thermostat also. What else can it be? I have heard that the fins on the water pump get to worn to pump coolant properly, can this be it? It doesnt run real hot ....Please give me whatever advice you can...thankyou

#12 of 20 Re: NO HEAT AND CANT FIGURE IT OUT [dnjsyl] by elkin1

Oct 04, 2010 (10:59 am)

Replying to: dnjsyl (Oct 03, 2010 4:23 am)
Sounds lika a circulation problem. Have you tried flushing the core with a water hose?

#13 of 20 Re: NO HEAT AND CANT FIGURE IT OUT [elkin1] by dnjsyl

Oct 06, 2010 (4:02 pm)

Replying to: elkin1 (Oct 04, 2010 10:59 am)
elkin1.....Yes, as i wrote in my post, i have flushed out the heater core.....Do you think that the water pump might not be performing properly? The truck does not overheat, but maybe the fins in the water pump might be worn to the extent where it needs to be replaced. what do you think? thanks Don

#14 of 20 Re: NO HEAT AND CANT FIGURE IT OUT [dnjsyl] by elkin1

Oct 07, 2010 (8:16 am)

Replying to: dnjsyl (Oct 06, 2010 4:02 pm)
I think that i would put the water pump on the back burner for now. Never
have heard that being a problem also you say one hose is hot and the other
is warm. Is the hot hose hard as in under pressure and the warm hose is it
hard?. Check the hardness of these hoses in clod engine and operating
conditions for good pressure in hoses. also might have to check duck work
could be a disconnected close to the core. Many things to check before
pulling water pump. I would disconnect the hose coming from the water pump
and see how much pressure it has also.

#15 of 20 Re: NO HEAT AND CANT FIGURE IT OUT [elkin1] by dnjsyl

Oct 10, 2010 (12:35 pm)

Replying to: elkin1 (Oct 07, 2010 8:16 am)
Hey elkin1, guess what.....i tried everything that i could think of and your advise too. I finally went to Napa and got a new, not remanned but new water pump for $51 and put it on yesterday.....now i have heat.....not so much at an idle but when you r driving the heat is good.......i still cant figure it out though....the fins on the old pump looked like new........but something wasnt right...........it had good bearings and all from what i could see........what else is there in the pump to malfunction? thanks for all the advise.........this forum is pretty good thanks again Don

#16 of 20 f250 super duty chugging by gooch11

Oct 11, 2010 (4:25 pm)

I have a 2000 F250 superduty 5.4 gasoline chuggs at idle and when trying to maintain speeds it runs good when I excelerate. I checked all the wires to my injectors, when I removed them on at a time the motor started to chug when I removed the right side rear injector there wasnot a differece so I replaced that one still same problem any advice.

#17 of 20 1990 ford f150 wont start by bassman73

Oct 24, 2010 (5:29 am)

i have a 1990 ford f150 with a 302 hsd to change out the alternator after i was done fired up the truck ran great then put it into reverse and it died ,wont start now have no spark out of coil and out of dist have power to each but no spark also noticed that when the key on the on postion i cant hear then fuel pump prime anymore replaced the fp relay and still no sound or start at mywitts end any advice

#19 of 20 Re: NO HEAT AND CANT FIGURE IT OUT [dnjsyl] by learning6

Oct 31, 2010 (7:37 pm)

Replying to: dnjsyl (Oct 06, 2010 4:02 pm)
1. REVERSE flush the heater core
2. Check to make sure the thermstat is not a by-pass thermostat

#20 of 20 Re: NO HEAT AND CANT FIGURE IT OUT [learning6] by chaughey

Jan 01, 2011 (2:09 pm)

Replying to: learning6 (Oct 31, 2010 7:37 pm)
by now you have likely repaired this but may I contribute? All modern car use a coolant (radiator) designed system. as the engine heats up the water pump flows warmed coolant through hoses to the inside of the car/truck. inside the vehicle is a device that looks like a small radiator. this is called a heater core. If the system were simply this as the vehicle heated up the driving compartment would be so hot you couldn't breath. A fan is connected with the core to drive the heat generated by this core throughout the car. depending on circulate or fresh mode the fan will either draw exterior air through the core or simply draw air from the cabin through. the heat is controlled by the flow of the coolant past the core via a valve in the coolant hose path. it additionally operates a set of doors inside the cabin around this core. the doors (gates) divert air flow. this is best explained using the example of opening the rear door to the house and then the front . the air will start to flow toward the opposite door . close the hallway door and the flow stops and depending on how much the hall door is wedged open the flow is controlled. open the door to the bath before the hall and open the window you find the flow going to the bath. make sense? OK so in the case of defrost mode the air is diverted to the windshield to clear it. many cars kick on the A/C compressor in this mode to draw moisture from the air creating a faster drying of the glass. Hope this was educational to some

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