Help: Z starts, but won't stay on!!
 

I need some help guys.

03 350z with 173K miles.

It has been working fine, took it out in the morning, got home washed it and when I tried to leave the car starts but wont stay on.

It revs up when I turn the key and then can't idle, it just turns off. The throttle pedal is dead, I cant even give it gas to keep it on.

About a month ago I had trouble with CAI slipping loose causing a rough idle. I fixed that and it has been fine till now

No engine lights or codes, not sure where to start, thinking of Cleaning the TB and the MAF sensor.

Suggestions, Help and links welcomed.

Thanks

UPDATE:

Looks like during the time my CAI got loose, some junk had gotten into the intake. I pulled the MAF sensor and saw noticeable dirt on it. Some compressed air and MAF sensor cleaner did the job.

Installed it, turned the car on and it idle rough for a bit then felt fine. A few revs, turned it off & on a few time, and everything feels back to normal.