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sprinkles08, ASE Certified Technician
Category: Toyota
Satisfied Customers: 22827
Experience:  ASE Master and Advanced level certified. Factory trained with 15 years dealership experience
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When I am driving with AC on the toyota Corolla doesn't want

Customer Question

When I am driving with AC on the toyota Corolla doesn't want to change gears
JA: How old is the transmission? Have you checked the brake switch?
Customer: I don't know how old it is. Brake switch?
JA: What year is your Corolla?
Customer: 2003
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: I would like to know if I can fix it but I have not tried so far
JA: Anything else you think the mechanic should know?
Customer: I have been told that I need a part from the Toyota dealership. Something to do with motor mount?
Submitted: 1 year ago.
Category: Toyota
Expert:  Ted Ritter replied 1 year ago.


Is this an automatic transmission?

Are you saying that it shifts perfectly normal with the A/C turned off?

Are any warning lights on the dash staying on?

Customer: replied 1 year ago.
it's an automatic
Yes I don't notice this when AC isn't on
No warning lights r on
Expert:  Ted Ritter replied 1 year ago.

Ok thanks for the info,

when taking off with the a/c on does it stay in first gear?

Customer: replied 1 year ago.
it seems to then eventually it changes but acts like it doesn't want to
Expert:  Ted Ritter replied 1 year ago.

and with the A/C off it doesn't do this?

Customer: replied 1 year ago.
That is correct
Expert:  Ted Ritter replied 1 year ago.

Ok, I think I got it now, what it seems like is that the a/c compressor is using a lot more of the engine power than it normally should, the compressor may be starting to fail and starting to seize up causing a loss of engine power.

Does this also happen with only the fan on inside? I'll have to admit to you this is the first time I have ever heard of anything like this.

Customer: replied 1 year ago.
that's correct it's does it when just the fan is on
So it's the compressor?
Customer: replied 1 year ago.
I have to admit I've been having unusual problems
Expert:  Ted Ritter replied 1 year ago.

No, not if it only does it with the fan on and the a/c off. Then turning the fan on has something to do with it not the a/c, would you agree with that?

Customer: replied 1 year ago.
I think so due to the fact I supposedly need a part for the motor mount which causing the car to shake when at a stop
Customer: replied 1 year ago.
The fan and AC also help the shaking when it is stop
Expert:  Ted Ritter replied 1 year ago.

Ok, so they told you that it needs a motor mount for the shaking problem, that makes sense, I just don't see any relation between a bad motor mount and not shifting gears, When turning the a/c off it reduces the load on the engine, causing it to idle faster and the vibration is less noticeable, Have the motor mount replaced and see if that helps.

Customer: replied 1 year ago.
That's the problem the motor mount was replaced 4yrs ago
Customer: replied 1 year ago.
Could u please respond
Expert:  sprinkles08 replied 1 year ago.

Hello and welcome to JustAnswer!

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