I have a2002 Maxima and I was wondering if anyone can help with a problem. When I start the car it runs good for 15 seconds than the idle will jump up and down like it's in safe mode. Has anyone had the same problem?

 

"Hello" is far from an appropriate thread title. I've revised it to something more meaningful. Please be mindful of your posts here on the Org.

Start by checking if you have any vacuum leaks/cracked hoses.