ok i just finished building my motor it a ka sohc built from bottom up and i finally got it in the car and theres no vacum leaks and timing perfect but for come reason when it gets worm the car dont want to idle and it just dies off i spent a really lot of money on the build and need the car running so please help

no shit talking if your not help i don't want to hear it thanks

rep will be sent

 

so the car runs and drives but when it gets to running temperature it dies? like a stubbling death or a quick one?

 

iv only moved the car off and on the lift but it seems to drive fine but ya it just stumbles and dies really pissing me off and it hasn't ran long enough to shoot out any codes

 

hmmm.... idk....

 

ttt

 

check the idle control valve behind the intake manifold or the coolant sensor make shured is not reding negative and is dumping fuel thinking the engine still cold.

 

thanks ttt

 

yeah, it sounds like the ECU doesn't know that the engine has warmed up. The amount of fuel is different bewteen a hot engine and a cold one. if it tried to idle and then dies, then it is probably the coolant sensor.
the o2 sensor could be causing an issue too, if it isn't reading correctly then your ECU will tweak and try to compensate for it.
and just to eleminate the possibility, hows your fuel pump? and fuel filter?

 

the pump working well it not making the humming noise like they do when they go bad as for filter good its new and clean i flushed the tank before the new motor thanks ill check it out

tt

 

ttt