My GSR is doing some weird stuff when it is idling. It would be normal for a while then the RPM gauge would go down to about 200 RPM then back up to like 800 RPM. It feels like the car is going to shut off b/c it shakes a little when the RPM drops and then comes back up. Has this ever happened to anyone?

 

you can reset the ecu by pulling the hazzard fuse and the back up radio fuse that are both located under the hood. put them both back in and start your car and let it sit and idle for about 3-5 minutes, or whenever the idle sets itself, it took my car about a minute.....

 

you have a vacum line kinked, cut, or leaking. listen for a hiss, and start pulling on ****.

 

you might also want to check you IACV. it might be dirty and not working right