so 4 weeks ago i moved to asheville, nc. we've had a couple cold days here (around 20 degrees) and i get no heat at idle. running down the freeway it's blowing hot as can be but after sitting for a couple minutes at idle i'm blowing cold. if i bring the revs up to around 2k i'll get heat again but it quickly leaves once they drop below. never having seen a cold day in this car i wonder if this is normal or if there's a problem developing. coolant level is ok btw.

 

You know what my car started having the same problem when i got my engine rebuilt... mabey ur engine was previously built...my tuner told me it was bad. That it could be an air bubble inside of the engine or something like that.

 

If the air bubble reaches the ECU it's game over.

The heater control panel has a self-diagnosis function.
To run the self-diagnosis function, do the following:

1) Set the mode control dial on the Vent position.
2) Turn the ignition switch ON.
3) Within 5 seconds after turning the switch on, press the recirculation control switch the required number of times depending upon the recirculation status:

- if the indicator is ON, press the recirculation control switch 5 times
- if the indicator is OFF, press the recirculation control switch 6 times

The recirculation indicator will come on for 2 seconds, then blink the Diagnostics Trouble Code (DTC) to indicate a faulty component. If no DTC's are found, the indicator will not blink after the initial 2 second light.

Blink Interpretation:
1 blink - a problem in the air mix control motor circuit
2 blinks - a problem in the mode control motor circuit
3 blinks - a problem in the blower motor circuit
4 blinks - a problem in the evaporator temperature sensor circuit

Word.

 

thanks, i'll give that a try this morning.


what air bubble are you eluding to and how could one ever possibly get to the ecu?

 

The air bubble and ECU comments were bogus and based upon an arterial gas embolism scenario. I couldn't help myself.

 

 

hahaha! i figured you were playing around. nice