My car runs pefect but when i turn the heat on the idle will bounce up and down and it will make a clicking sound under the hood like something is turning on and off? any ideas i know its not the blower motor cause that works.

also i gutted the screens on my maf will that throw a cel?

 

When you put on the front defog/frost with the temp above 32 that will tunr on the a/c to remove the moisture from the air, that would account for the both the clicking (a/c cycling on/off) and the idle change

 

yah but this will do it all the time i drove 2 1/2 hours and it did it when i was done driving. I'm currently taking a/c classes in college i'll just ask my teacher or something.

thanks tho