Alright, car was running fine, installed custom FMIC with an ebay piping kit that was cut and welded everywhere except at the IC inlet/outlet and at the TB (higgi adapter). After the install, the car starts for a second but won't stay on...if you give it gas to try and keep it running and it hits about 900-1000rpm then stalls. What are the most likely problems?

 

sounds like a vacume leak.

 

If you're still running an AFM system then My 1st guess would be that youve got a massive vac leak somewhere. My car did a similar thing when I had a IC hose half off.
Is the AFM plugged in?

 

yup check the AFM connection. Than check, the few couplers and clamps. Give your intercooler piping a good pull see if its loose.

IF everthing checks fine. Than i bet your welding job just isnt cutting it. Check one piece pipes for leaks. Find a way to put pressure in the pipes to check for leaks.

Did you clean and grind the welds and pipes?

 

ya def. sounds like a AFM or vac leak somewhere...

 

*vote for AFM*...

have had the same prob... your AFM isnt connected