Originally Posted by JB_MUSTANG_V6
Okay so my 2000 gt likes to idle a little low after start up when being shut off a couple times. Like if I go to work then home. And then to the store and home. Then go to the gym the idle acts funny. It will drop down to 500-600 rpms then shoot to 800-900 rpms. Any thoughts are welcomed thank you. Btw already cleaned out the iac and tb.
Unfortunately there are several factors when it comes to idle....
air intake, fuel intake, battery charge, spark plugs, fuel pump going out, etc....
Usually if there isn't enough air coming in, the idle starts to get a little rough, but if there is too little or too much gas, then the same thing happens. Check your spark plugs and make sure they don't have too much composite on them. Make sure you're burning fuel as efficiantely as possible.
Could also be a sign of your fuel injectors being clogged. I'd just do everything at once and see how it runs. If all else fails, check the fuel pressure to see if it is continuous or fluxuating.