I purchased a 2007 Xterra 7 months ago from a local dealer. At times I go to start the car and it will not start. I wait for a minute and try again and it will start. This happens every once in a while and I can't predict when it will happen.

Last Saturday I parked the car after driving it for 30 minutes. I had the car off for about 10 minutes. When I went to start the car, the engine felt like it was jolting and felt like it was going to drop out the bottom. I immediately turned off the car in fear. I waiting 5 min and tried again. It started but didn't sound normal but a slow start.

It worked fine after that. Now 3 days later I went to start my car again this morning and it was a slow start but started.

We live in Santa Barbara, Ca so it's not that cold.

Has anyone had issues like this before and can give me a hint to what this could be?

Thanks
Stacy