ok this one really has me stumped. i just rebuilt my motor b16. but when i went to start it it sounds really weak im getting fuel have spark and its in time. please help me i have no ideas. i can tell you whatever you need to know about the motor if it would help.

 

check
1. vacums
2. grounds
3. fuses
4. ecu
5. firing order
6. coil voltage

 

try valve timing it they might be to tight and not letting the cams spin fast enought to start