I just finished my build and started the car up friday. It started up pretty good and it was self learning, but i was having gauge problems and my o2 sensor wasnt hooked up
yet, and i had a small fuel leak. so i shut it down and fixed these problems and now the car wont start. it sputters then shuts off. If I pump the gas i can get it start but i have to keep pumping the gas to keep it alive. during fixing the other problems, the UIM was removed, the PFC was moved around a little, and the o2 sensor was hooked up. those are the only things that changed. I noticed a couple of things now though. For one when the key is on, after awhile the BAC will start buzzing rather loudly. Also the boost on the PFC reads -756 or something like that, even when its cranking. if i unplug it it goes to +2. I tried hooking it up to a vacuum pump and blowing in it and got no change on the pfc. Does this mean the boost sensor went bad coincidentally after i fixed that stuff? And what is up with the BAC? Please help i need to get this car broken in and ready for tuning.
Charlie

 

MAP sensor doesn't sound right. It should read around 0 with the key in the ignition and engine off. go to etc-->sensor/sw check and look at your voltages.

 

Have you maybe fitted a one way valve instead of a filter in the map vac hose.

 

I never removed the filter but it is worth checking. I am swapping out a map sensor today so i will see. the thing that really worrys me is the BAC acting so wierd. it that a constant power with a PWM ground or constant ground with a varying analog voltage?