Ok guys I have a 00 lc 1.5l I just rebuilt the motor machine shop work and all it Will start and run for 3 seconds and then die. If I hold the gas pedal it will run but sound rough and as soon as you let go it dies I have been able to get codes multiple misfires, misfire cylinder 1, misfire cylinder 2, and misfire cylinder 4 I have put brand new plugs (copper core ngk), wires coils, crank sensor, cam sensor, iac, tps, maf and the injectors all have new orings it also has ntk o2 sensors that might have 1000 miles on them can someone please help me. I'm lost

 

It sounds like it's not getting enough fuel. Check your fuel pump. Your fuel filter too.

 

Could the fuel/spark timing be off?

 

im goin to go with timing.

 

Could be a bad vacuum leak. Check all hoses are connected. Also check the idle motor.

 

This^



Double check your timing marks

 

The only time I've had this EXACT problem it was a serious vacuum leak. The key similarity being running for a few seconds then dying unless you really play with the throttle.



Also triple check the wires and firing order.