help with lean idle
#1
Former Sponsor
Thread Starter
iTrader: (12)
Join Date: Oct 2005
Location: ft lauderdale
Posts: 868
Likes: 0
Received 0 Likes
on
0 Posts
help with lean idle
im attaching a log of my idle. my car has had a rock solid 14.7-14.8 afr at idle, and now suddenly after an o2 dump install my car is idling at 17-18.0 afr. at wot the afr seem to be fine. another thing to note is that we swapped the o2 sensor because the one in my old o2 housing was cross threaded. another weird thing is that usually when the afr goes all the way up to 18.0 the rpm will dip and want to stall, but now with it at 18.0 it feels the same as when its at 14.7. any input would be appreciated. thanks
#6
Evolved Member
iTrader: (90)
Join Date: Jul 2005
Location: Roselle, IL
Posts: 1,917
Likes: 0
Received 0 Likes
on
0 Posts
Pull off the o2 dump, apply a generous layer of orange gasket maker on the entire o2 dump flange + layer a fresh gasket on top, and retorque it back on; it's happening between the o2 and the turbine housing of your turbo.
Trending Topics
#12
Former Sponsor
Thread Starter
iTrader: (12)
Join Date: Oct 2005
Location: ft lauderdale
Posts: 868
Likes: 0
Received 0 Likes
on
0 Posts
found some loose bolts on the manifold and one that was missing, tightened them up and it still idling lean.
i may be wrong, but when the car is at idle, doesnt the ecu read directly from the front o2. and if i was to get a bad o2, it could be causing the lean readings? just a thought
i may be wrong, but when the car is at idle, doesnt the ecu read directly from the front o2. and if i was to get a bad o2, it could be causing the lean readings? just a thought
Last edited by diiirk@AwdMotorsports; Sep 5, 2008 at 12:45 AM.
#14
Evolved Member
iTrader: (2)
Did you splice wires when you replaced the O2 sensor? I've heard that the signal wire can be quite touchy when it comes to splicing. If you did splice did you solder the connection?
Thread
Thread Starter
Forum
Replies
Last Post
papabeardoe
Evo Engine / Turbo / Drivetrain
5
Jun 12, 2016 03:27 PM