S14 with sr20 won't rev past 1500rpms!!!!!

[s14inphilly]

I own a JDM S14 with a sr20 blacktop.When you just start the car it revs fine but when it gets warm it won't rev past 1500rpms!But if you shut the car off and restart it it's fine for awhile then it does it again!Someone told me it's going into safe mode.I don't know if it's the airflow sensor,or the ecu,or tps switch.I was going to try the air flow sensor first.But any helpfull suggestions would be appreciated!

[Nismo_Freak]

Replace the MAF

[Rookieca18det]

my car did this when my ecu went bad but I think nismo is right and you should try the maf first. If it still does it borrow a friends ecu and see if that fixes it. Good luck

-richard

[s14inphilly]

Thanks guys!I replaced the mass air flow sensor and reset the ecu and she runs great!I'm thinking about upgrading the MAFS to a z32 and installing a safc.