So I have a maxima se with around 230000 miles. a month ago I had my tranny changed, new sparkplugs, and new cats. well now it'll start right up once then i drive for about half an hour or so ill turn it off go take care of whatever I'm doing and I'll get a crank no start when I leave. Its been like this since I got the tranny changed. I've already replaced the fuel pump, cleaned the crank sensor, and tried diagnostic but im getting no codes.
I guess My main questions are could something be malfunctioning once my car warms up but still functions while it's cool? Or has anyone else experienced this as well and what did you do?

 

Try to start it while giving it some air/gas. If the car starts, it's very likely that your Throttle Body needs cleaning.

 

You didn't specify what engine or year. The 3.0L has two crank sensors. The 3.5L has cam sensors that are known to fail (though they should exhibit worse symptoms).

Cleaning the TB/IACV is a good idea if it's a 3.0 as maxiboi :P said.

 

It's a 2000 and I believe it's 3.0L and I'm gonna go ahead and give it a clean and probably check out the sensors I know there's one by the oil filter I cleaned that one up when I changed the oil awhile back

 

So I got everything cleaned up including my crank sensor near oil cap and TB\IACV but in taking apart everything my MAF caused my ses light to come on so I went ahead and tried the cleaner now I just need a search on here how to reset it seems like everything is working pretty well now it's starting every time now at least