climate control DEF -> loss of power
 

I have a small problem with my SVX '93
When I put the climate control to DEF the car lose power. It can still drive byt it gets slow.

It is properly a bad ground connection some were, but I could use some help on where to look.

I have taken the one at the battery off, moved and re-attached. Maybe I should replace it, since if this one i bad, everything is bad.


----
Henrik from Denmark - we have your first lady here today...and Opera..:lol: -

Re: climate control DEF -> lose of power
 

Does it do the same thing on 'AUTO' temp set @66 degrees?.. Def. also starts the A/C compressor, (a H.P. absorber) could be trying to sieze up....other can be bad battery (charge and test) start the car and turn on everything except the DEF. see if you experience the same loss of power. Battery connections (clean) ..alt. (check output voltage). Check Idler bearings.
good luck..
You meant 'Oprah'.
M7

Re: climate control DEF -> lose of power
 

I have now tried to turn on the rear window heater, the seats, mirros, couise control, with-out any change. The car run fine

It is only when I turn on the DEF or use the AUTO on the climate.
Can the compressor for the air-con realy take so much power that the car have difficuly driving?

For me it sounds like the ignition is way off.

The Idler bearings - Do you mean the one for the timing belt?


And yes I meant 'Oprah' -thanks-
---------
Henrik -Denmark-

Re: climate control DEF -> lose of power
 

Yes when the compressor is starting to seize. Try take the A/C belt off and see how it responds to that change. While the belt is off, try turning the compressor wheel by hand.

Tom

Re: climate control DEF -> lose of power
 

Now I have had the belt off. The compressor turns fine I think, when I turn it by hand. It is not loose and not difficult to turn. It dos not feel like the bering is gone.

I have noticed that the RPM stayes at 600. Is there something about that the RPM should go to 900 whene the Air-con is on?

I have not tried to run the car without the belt on.

Re: climate control DEF -> lose of power
 

Try driving it with the belt off then and see if it changes anything..... it can spin freely now but the compressor clutch isnt engaged while the car is off, still leaving the compressor as a possibility.

Re: climate control DEF -> lose of power
 

I had the compresser engaged by turning the DEF on with power on. (not engine started).
I will try to run with the belt off. I will have to remove the other belt to remove it I guess.
You af both probably right, it is the only way to ensure that it is the compressor.

Re: climate control DEF -> lose of power
 

You have to start the engine in order to engage the compressor. The crank pulley does not turn unless the engine is running so the compressor pulley would not be spinning.

Re: climate control DEF -> loss of power
 

I have now had the belt off. The sympthoms are better, but there still is a significant loss. Maybe it is normal. When the engine gets worm, there is no problem.

Btw, the compressor belt tensioner bearing need to be changed I think. Is it possible to change the bearing itself or do I need a compleate new wheel.

Re: climate control DEF -> lose of power
 

An idler pulley completely seized on my old Suby wagon (with a whopping 90 HP) and all it did was emit a blood-curdling shriek and shed the belt. There were no telltale drivability issues. The AC compressor definitely saps a bit, but if it were binding-up to the point of causing "significant" power loss I think the belt would let you know. Perhaps your compressor is failing but I'd bet that's only contributing to some other problem.

dcb

Re: climate control DEF -> loss of power
 

You can replace the bearing. You can get one from Amazon HERE

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Re: climate control DEF -> loss of power
 

Great. Thanks.