NO START BUT CRANKS?

[Zz300xX]

Okay so here is the problem with my car as the title says my car wont start but it does crank. Me and my brother found out that if i push start it it will start. When it starts however it runs fine the only problem i have once its going is that when i stop at a stop sign my idle is a little high (1,100rpms) but it was like that before this problem and it always started. Also ive found out that if i dont push start it and just wait like 3 hours i can start it with the key and its starts up perfectly or sometimes, i have to push the throttle some however if I don't start it in the first crank then i have to wait another hour or so...which is the reason i push start it instead since its fast just annoying and don't always have a buddy with me to help.

I pulled the following codes from ecu: 53, 13
would these be the cause?

Any ideas would help since I'm stuck and starting to give up on this car :/

Thanks for reading by the way if you have any links of possible ideas just paste them on here and ill look at them thanks again.

[t.mcginley.jr]

Code 53 is the right O2 sensor and code 13 is the coolant temp. sensor. The bad o2 sensor will just cause it to run crappy, shouldn't cause any starting issues. The bad coolant temp sensor will also cause it to run crappy, but could possibly not let it start. What happens is the sensor is telling the ecu that the engine is either too cold or too hot (usually too cold) so it dumps fuel and can flood the engine. I had the same code and got a new sensor off ebay, codes gone now. This sensor being bad can also cause weird idle issues.

Even if you replace the coolant temp sensor, it still might not start. It sounds like you have some other issue that the ecu isn't catching. Could be a bad ignition switch, PTU, PTU harness, or some other electrical problem. If you get it running and it stays running it's probably not fuel pump issue.

You should check out this thread if you haven't already:

everything-you-need-to-know-about-the-z32-t508377.html

[t.mcginley.jr]

and this:

car-not-starting-t523102.html