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Old 04-24-2009, 11:12   #1 (permalink)
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heat/idle problems

ive searched for this and i cant quite find exactly what im looking for. i had to go through the dramatics of ripping apart the dash to replace the instrument cluster bulbs, & for those who've done it you know how much of a PITA that is. when i removed the radio/hvac controls, something happened but im not sure exactly what. now whenever i turn the heat on, it only comes out of the defrost and a tiny bit on the floors but not enough to be felt. i looked at the controls after i replaced everything and i noticed that i didnt completely disengage the heat before i unplugged everything, could that have something to do with it?

now for problem number 2. i purchased this car with 14k miles, it now has 104k and i've had a heat-related idling problem that i could never conquer. it only occurs when the heat is on, it will idle fine and about every 15-20 seconds or so the idle will drop down to about 400-550 and it feels like it was ready to quit, then it will go back to the reg. n repeat. the battery light used to flash real quick when it would bog down, i replaced the battery, that problem went away but i still have the idling problem. i have a SRI but i didnt install it til about 68k or so, so that shouldnt be the problem.

any ideas??
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Old 04-26-2009, 21:53   #2 (permalink)
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Question Re: heat/idle problems

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Originally Posted by mbooth420 View Post
ive searched for this and i cant quite find exactly what im looking for. i had to go through the dramatics of ripping apart the dash to replace the instrument cluster bulbs, & for those who've done it you know how much of a PITA that is. when i removed the radio/hvac controls, something happened but im not sure exactly what. now whenever i turn the heat on, it only comes out of the defrost and a tiny bit on the floors but not enough to be felt. i looked at the controls after i replaced everything and i noticed that i didnt completely disengage the heat before i unplugged everything, could that have something to do with it?

now for problem number 2. i purchased this car with 14k miles, it now has 104k and i've had a heat-related idling problem that i could never conquer. it only occurs when the heat is on, it will idle fine and about every 15-20 seconds or so the idle will drop down to about 400-550 and it feels like it was ready to quit, then it will go back to the reg. n repeat. the battery light used to flash real quick when it would bog down, i replaced the battery, that problem went away but i still have the idling problem. i have a SRI but i didnt install it til about 68k or so, so that shouldnt be the problem.

any ideas??
Year, model, and engine please.
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Old 04-26-2009, 22:43   #3 (permalink)
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Re: heat/idle problems

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Year, model, and engine please.

It's an 03 Taurus SES.. I believe it has the Vulcan engine it's the slower of the two.
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Old 05-05-2009, 11:33   #4 (permalink)
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Re: heat/idle problems

Do you have the electronic climate control or the one with knobs? Either it sounds like the blend door actuator quit working.

As far as the idle it may be the load of the fan is dropping the RPM. This would be because the IAC is not allowing enough air in to keep the engine idling at the proper speed.
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Old 05-05-2009, 12:20   #5 (permalink)
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Re: heat/idle problems

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Originally Posted by SHOZ123 View Post
Do you have the electronic climate control or the one with knobs? Either it sounds like the blend door actuator quit working.

As far as the idle it may be the load of the fan is dropping the RPM. This would be because the IAC is not allowing enough air in to keep the engine idling at the proper speed.
its the non-electric climate control
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