Air injection system bank 1 and bank 2
#2
08-16-2004, 11:32 AM
Registered User
Join Date: Jul 2003
Location: SF Peninsula and N Lake Tahoe
Posts: 964
Rep Power: 59 
The air injection system is used on cars to add fresh air to the exhaust valve exit stream to raise it's temp and warm up the cats faster for reduced emissions . It's partly why the exhaust sounds so good at cold start up. Any changes to the headers/cats/ECU/leaks etc could throw off the parameters/limits of the air injection system and throw an OBDII code.
#3
08-16-2004, 11:41 AM
Join Date: Jul 2003
Location: Here
Posts: 1,331
Rep Power: 74
Originally posted by MKW
The air injection system is used on cars to add fresh air to the exhaust valve exit stream to raise it's temp and warm up the cats faster for reduced emissions . It's partly why the exhaust sounds so good at cold start up. Any changes to the headers/cats/ECU/leaks etc could throw off the parameters/limits of the air injection system and throw an OBDII code.
The air injection system is used on cars to add fresh air to the exhaust valve exit stream to raise it's temp and warm up the cats faster for reduced emissions . It's partly why the exhaust sounds so good at cold start up. Any changes to the headers/cats/ECU/leaks etc could throw off the parameters/limits of the air injection system and throw an OBDII code.
Thanks for the info...I believe I have a boost leak somewhere...most likely a split DV hose. When I was trying out the HKS BOV, i purchased vacuum hosing from a local autoparts store (definitely not as robust as the stock tubing) and now I must have a boost leak as Im only peaking at .8 bar. Oh well...time to pull the hoses and check them out.
Thread
Thread Starter
Forum
Replies
Last Post
vividracing
997
11
10-06-2015 03:43 PM
ECS Tuning - VW
VW Vendor Classifieds
1
08-19-2015 11:08 AM