for those with CAI
Mar 7, 2010 | 07:29 AM
#11
??? i have a 4" true CAI an i never got a code. yet if that intake tube doesnt have a place for the valve cover hose then you need to drill a hole an tap it with a 3/8" NPT tap an put in a push on fitting 
itll fix it
itll fix it
Mar 7, 2010 | 03:56 PM
#13
The ecu has a +/-25% adjustment for your fuel trim, and no cai will give you anywhere near that much extra airflow. A tune will help you get the full benefit of the cai, but his problem is due to the breather line being interrupted. I had the same dtc's when I upgraded, and it took me a little while to get some answers to my problem. After I spoke to a tech friend of mine, he pointed me in the right direction
May 23, 2010 | 02:26 AM
#14
Thread Starter
TECH Enthusiast
iTrader: (2)
Joined: Aug 2004
Posts: 653
Likes: 0
From: McAlester, Ok
You need to reroute the passenger side breather tube back into the new intake tube. I drilled a hole in the cai tube, inserted the proper size rubber grommet, then modified the existing breather tube to reach the intake tube and fit into the grommet. The code went away and never came back after I did this mod. Let me know if you need more help
May 24, 2010 | 09:35 AM
#16
The hose in question is just the PCV fresh air intake, on my tahoe I just put a mini filter on it, no codes ever. You could do that or connect it back to the intake tube, cannot see how this is causing your codes unless it is blocked off or clogged.
May 27, 2010 | 12:56 AM
#17
I also tried the breather filter method and it only worked for a few weeks before I tripped the same code. Mine was a 171 lean code, and if you route that breather line into the new intake tube, I promise you that code will stop. Ill take some pics when I get a chance, but this is a super easy fix. My code hasnt come back on since I did the work, which was late last summer
Thread
Thread Starter
Forum
Replies
Last Post
LARRY01Z28
GMT 800 & Older GM General Discussion
28
Sep 28, 2015 07:54 AM
