View Single Post
  #4  
Old 11-14-2012, 10:25 AM
16valex's Avatar
16valex 16valex is offline
Officially Welcomed to the 'Fest
Location: Albany NY
 
Join Date: Jul 2004
Posts: 2,588
Mein Auto: 530I/5SC 97-528/5
When un-plug and plug any electrical connector always be cautioned to switch the ignition OFF.

Did you unplug the MAF while the car was running? If this is the case your ECU is going nut trying to map. You should erase all the codes and start over again and see what codes are going to come back.

If your CAT is original and with 259K miles I bet it's all clogged up, and this is the reason why you have back fired through the intake.

If I were you, it's time to shop for new CAT.
Replace the intake manifold gasket and all the hoses under it.
Replace the fuel pressure regulator.

GL
Reply With Quote