Emissions question - manifold studs
Thread Starter
|
Freshman User
Joined: Feb 2009
Posts: 32
Likes: 0
From: Southeast, WI
Emissions question - manifold studs
So, I have an 03 expedition, 198k, 4.6l. Check engine light on, too lean on passenger side: broken manifold studs. I know the right thing is to take manifold off and replace the studs. I have neither the time or space to do that right now, also not sure about giving my local Indy $1200+\- to do it, and jury is out about keeping the expedition going a lot longer. With all that in mind is there a trick or hack to fool the sensor into not sensing too lean, get the light off, pass emissions? Thoughts, opinions, suggestions are definitely welcome. Thanks
Moderator
Joined: Jul 2011
Posts: 6,508
Likes: 657
From: Sioux Falls Area
$1200 is steep.
i paid less than $700 to do the passenger side on my 2014. Local independent shop prices at $90/hr shop time.
I’d check around.
you can probably fool the oxygen sensor with a spark plug non-fouler, but it won’t pass emissions if they see it in there during a visual.
i paid less than $700 to do the passenger side on my 2014. Local independent shop prices at $90/hr shop time.
I’d check around.
you can probably fool the oxygen sensor with a spark plug non-fouler, but it won’t pass emissions if they see it in there during a visual.
Hotshot
Joined: Jan 2004
Posts: 19,760
Likes: 1,079
From: St Louis
is there a trick or hack to fool the sensor into not sensing too lean, get the light off, pass emissions?
Exhaust leaks upstream of the upstream sensors can indeed cause "lean" codes if fresh air hits the sensors. Usually, vacuum leaks account for over 90% of the occurrences of those codes so you might want to rule that out first.
Thread Starter
|
Freshman User
Joined: Feb 2009
Posts: 32
Likes: 0
From: Southeast, WI
Nope. The anti-fouler suggestion previously provided is misapplied. It isn't for use with the upstream sensors.
Exhaust leaks upstream of the upstream sensors can indeed cause "lean" codes if fresh air hits the sensors. Usually, vacuum leaks account for over 90% of the occurrences of those codes so you might want to rule that out first.
Exhaust leaks upstream of the upstream sensors can indeed cause "lean" codes if fresh air hits the sensors. Usually, vacuum leaks account for over 90% of the occurrences of those codes so you might want to rule that out first.
Yesterday, for kicks, since nothing else seemed to be working and I was going to be on the road all day with it, I cleared the stored codes, and patiently pounded on miles waiting for the CEL to come back on. 320 miles later, and no light. So tonight on my way home from work I had emissions test done and we are in the green. So, I still have broken studs and will need to navigate that, but I made my emissions test deadline so at least I won’t get a ticket. Thanks for always having ideas, thoughts, and input. Keep Fording on!
Thread
Thread Starter
Forum
Replies
Last Post
saberworks
1997 - 2006 Expedition & Navigator
16
Oct 29, 2010 11:34 AM
hink10
1997 - 2006 Expedition & Navigator
13
Jul 4, 2004 01:52 AM
