Hey guys, so about a week ago i replaced my manifold, because it was cracked. After I replaced it my car was back to normal, I had my sps3 set to agressive boost, and on performance mode. After running for about an hour my cars check engine came on and made a popping sound. As i pushed the throttle it just bogged out and had no power. The car then stalled, so when I tried to start it again it started then immediatly died. So i unplugged the MAF and it ran, not good but it ran. So i got a new maf and with the new one plugged in it does the same thing. I also used another senosr out of another A4 to make sure the one i bought wasnt defective. The codes from the cel are random missfire and missfire on all cylinders, and also p0201 wich is mass air flow low input. So the car will run with maf disconeccted but will not go into boost. Then with the maf connected it just starts and stalls. Now i don't know what to do. Please help if know of anything else to check for.

Thanks,
Chris - Email-Csantagata21@gmail.com

 

Check your hoses, you most likely have one that came off. When you unplug the maf the ecu just ends up running right off the 02 sensor. Every thing you mention points at a hose off. Check the turbo outlet hose and the turbo inlet hose to make sure they are on 100%, if those are good check the rest of the IC hoses.

 

massive leak! lol what mike said.