Why would the A/C make my car accelerate rough?
July 30, 2011 12:44 PM Subscribe
Why does my car's air conditioner cause it to hesitate when accelerating?
posted by breakin' the law to Travel & Transportation (9 answers total) 3 users marked this as a favorite
I have recently been having an issue with my car hesitating during acceleration, especially from a complete stop. I had suspected it was the fuel injector and I went to my (very trustworthy) mechanic the other day, who agreed. He suggested that I fill the tank up with high-octane gas and then pour in a fuel injector cleaner before embarking on a costly repair.
While driving to the mechanic's, I noticed that the car accelerated smoothly, which struck me as odd. After coming home from work that day, I got in the car and pulled out of a parking space...smooth acceleration. I switched on the A/C, came to a stop sign, and accelerated again. Jerky acceleration.
It suddenly occurred to me that I did not have the A/C running in the morning when driving to the mechanic's. I pulled over to a complete stop and turned the A/C off again to see what would happen - smooth acceleration. I then did the same with the A/C on - hesitation. I drove home with the A/C off, and it was smooth the whole way.
I then realized that I began experiencing this problem when I began running the air conditioner on a regular basis. It's pretty clear to me now that the A/C is somehow making the car hesitate during acceleration.
So my question is...WTF? This has never happened before. I've done a bit of googling on the issue, and it seems there are some electrical components that may be to blame, but I haven't found anything terribly specific. Also, if you can say what the problem is, about how much would it cost to fix?
BTW, car is a 1999 Camry with 135k miles. Previous owner was a relative and it's always been well-maintained. I had some major maintenance done a few months ago by said mechanic, who checked out the engine and everything in the process and said it's in good working order.