i just installed a ztube and a injen air filter to my 2004 g35x sedan and for some reason my car wont start it will crank but wont start. than i put my stock intake back in and my car still wont star does anyone know what could be wrong with it?

 

check the MAF and the vacuum line under the intakes.

 

Did you unplug something you shouldn't have?

 

i did check the Maf. but what u mean by unplug somthing i shouldn't have like what?

 

If you disconnected your battery to reset your ECU, make sure you reconnected the battery

 

Make sure you reconnected the MAF. Also, you may have tripped the immobilizer. Try ON for 5seconds then off for five seconds. Then try to restart.

 

^try that