Still have climate control problems! - TCCoA Forums
 
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post #1 of 12 (permalink) Old 11-04-2002, 01:40 PM Thread Starter
 
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Unhappy Still have climate control problems!

I posted a message on here before, but I never posted a follow up on the result. I did the climate control self test, and I got a reading of 42, being the ambient temp sensor. I replaced it with a new ford sensor from 5 Star, but it still trips that code. Also, when I turn the air (or floor/def heater for that matter) the car idle jumps back and forth from 700 to 1100 rpm or so. With the climate control off, it idles smooth as can be. The air is never cold and the compressor never engages. The car is a 95 lx 4.6.

Thanks,
Ryan
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post #2 of 12 (permalink) Old 11-06-2002, 11:10 AM Thread Starter
 
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Anyone?

Can anyone help me on this? I really don't want to go to a mechanic...
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post #3 of 12 (permalink) Old 11-06-2002, 11:26 AM
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Did you clear out the code 42, after installing the new sensor?

Also, my car does the same idle thing as yours does. Haven't figured it out yet.
I do get cold air from my AC system.

Steve - TCCoA member
2003 Crown Vic LX Sport
1995 T-Bird LX 4.6 retired at 247,888 miles
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post #4 of 12 (permalink) Old 11-06-2002, 01:13 PM Thread Starter
 
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I cleared it by disconnecting the battery for 2 minutes, and then reconnected it. Is there a different way to clear it?
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post #5 of 12 (permalink) Old 11-06-2002, 02:33 PM
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I am not sure if disconnecting the battery (negative terminal) for only two minutes clears anything.
I think the shop manual says at least 5 mins., but most use anywhere from 10 minutes to two hours.

Here's how you clear it via the satc system;

Perform the SATC System Self Test using the procedure that follows. Record all trouble codes displayed during the self test.

The self test can be initiated at any time with any resulting trouble codes. Normal operation of the system stops when self test is activated.

To enter self test, position the blower control knob at AUTO and the Function Selector Knob in either PANEL or FLOOR.

Then, press the COOL and OUTSIDE TEMP buttons simultaneously and press the WARM button within two seconds. The display will show a tracer segment going in a counterclockwise direction in the center of the display window during the self test.

When the self test is completed, Trouble Codes for any fault will be displayed in the VFD Window. If no faults are found, all display segments will illuminate.

To exit Self Test and RETAIN all Trouble Codes, press the COOL (BLUE) button.

To exit Self Test and CLEAR all Trouble Codes, press the OUTSIDE TEMP button and then, press the WARM button.

After exiting the Self Test, the ignition should remain ON for at least 25 seconds to allow the temperature blend door actuator to calibrate.

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2003 Crown Vic LX Sport
1995 T-Bird LX 4.6 retired at 247,888 miles
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post #6 of 12 (permalink) Old 11-06-2002, 10:15 PM
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Pull fuse number 15 under the hood and try to start the car a couple times. Wait a little bit then put it back in, that'll clear the EEC.

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post #7 of 12 (permalink) Old 11-06-2002, 10:21 PM
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Average Joe, what I am not sure of is, if resetting the EEC by disconnecting the battery will clear out the error stored in the SATC unit. This code is not stored in the EEC. That's why I posted that info.

Steve - TCCoA member
2003 Crown Vic LX Sport
1995 T-Bird LX 4.6 retired at 247,888 miles
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post #8 of 12 (permalink) Old 11-06-2002, 10:30 PM
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Yeah, the only way that I know of to clear codes in the SATC is to perform the self test and clear them from there (even though I've only gotten the self test to work once)

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post #9 of 12 (permalink) Old 11-11-2002, 02:02 PM Thread Starter
 
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code has cleared, but...

OK, I have cleared the code and the self test is now clean. However, now if I have it on anything other than "Floor", my engine idles up and down. It even does this on defrost. Air still isn't cold either. I have not checked to see if the compressor is kicking on, but I doubt it is. Any ideas?
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post #10 of 12 (permalink) Old 11-11-2002, 02:18 PM
 
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My neighbors Exploder had a similiar problem (no Auto climate control though). He had a leak in the AC line and it would cause pressure to go down in the refrigiration lines......his compressor refused to kick on unless we hooked it up directly to the battery.....after fixing the leak it still wouldnt kick on (I think there was another leak)...he ended up getting a Cherokee....
--Craig
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post #11 of 12 (permalink) Old 11-11-2002, 03:16 PM
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Sounds like the AC clutch is not engauging and the EEC is anticipating the additional load hence the surge in RPM. You could try jumping voltage from battery to the clutch to see if it physically works. If it does I would look for an AC problem not letting the clutch engage.

L. Thomas
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post #12 of 12 (permalink) Old 05-31-2003, 01:58 PM
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I know this is an old thread, but I solved the idle problem with my T-Bird.

I checked the high pressure side of my AC system, and found it was at 100 psi.

After adding 1 1/2 cans of r134a, the system pressurized up to 170 psi.

No more idle problems.

Steve - TCCoA member
2003 Crown Vic LX Sport
1995 T-Bird LX 4.6 retired at 247,888 miles
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