fog80

I changed my hid bulbs yesterday and today I'm getting a rough idle when my foot is on the brakes, but not in Park.

I disconnected and reconnected the battery as part of the bulb change. I also opened the two screws to check my air filter but I screwed them back in.

What else could I have done?

Andy Tsang

I would double check to make sure you didn't accidentally undo a vacuum line. Just make sure you have everything reconnected by doing a thorough inspection.

fog80

I just checked under the hood and i don't see anything disconnected. Is there any lines I need to check specifically?

3.2TLc

Hey Fog80, the best thing to do is go over all of your work and anything within the area which may have got bumped or loosened up at the time. When you mentioned the low idle in relationship to applying the brake pedal, it may be vacuum related as previously stated. Good place to look would be any of the vac lines on that side of the motor. Recheck the air filter boot for leaks.

If everything checks out ok, then run the car some. When the battery was disconnected, the computer system takes some time to relearn some of the basic operating parameters such as the idle. But, if the idle was ok before and there's no problem when in park.....It's something simple !

ErickUa5

Check the vacuum line on the brake booster, if no damage then might just need to do the idle relearn procedure.