8

My IAC is bad and in order to keep my car running while a stop sign/light is to have one foot on the brake and one foot on the gas.

Is this an effective fix to travel until I get it fixed?

Or

Should I just not drive it?

closed as primarily opinion-based by kmarsh, Poisson Fish, DucatiKiller, Zaid, Fred Wilson Jan 9 '16 at 1:34

Many good questions generate some degree of opinion based on expert experience, but answers to this question will tend to be almost entirely based on opinions, rather than facts, references, or specific expertise. If this question can be reworded to fit the rules in the help center, please edit the question.

6

This wont do any damage to your engine until you have an accident making a mistake with the pedals:) The IAC would only doing the same function that you are doing manually. I do think you have more of a problem than the IAC being faulty, since it should just add extra air when you switch things on like the lights, air con etc. Maybe your throttle butterfly valve is dirty and not allowing sufficient air through for normal idle speed.

  • 1
    It won't damage the engine, but you won't be doing the transmission (specifically, the torque converter) any favors. – TMN Jan 7 '16 at 17:17
  • @TMN I don't think he was suggesting he was in drive. – HandyHowie Jan 7 '16 at 17:48
  • Fair enough, I guess I read squigbobble's answer and made the assumption that he was driving an automatic. – TMN Jan 7 '16 at 17:55
  • I made that assumption based on him having to hold the car with the brakes. I driven automatics and it's easy to slip into the habit of just leaving it in D all the time. – squigbobble Jan 8 '16 at 9:07
4

As HandyHowie said, this won't cause any damage.

However, there is a better way, based on the assumption that you have a foot on the brake because you leave the car in D at the lights. If the car will still idle in N with a bad IAC, select N as you're coming to a stop and put it back in D as you press the gas pedal to set off again. Make sure the revs are up a bit before selecting D. You'll also save fuel this way.

Not the answer you're looking for? Browse other questions tagged or ask your own question.