how long can I go with no o2's?
#1
12 Second Club
Thread Starter
iTrader: (1)
Join Date: Jan 2005
Location: Eastern, CT
Posts: 646
Likes: 0
Received 0 Likes
on
0 Posts
how long can I go with no o2's?
I tried to search but i only found ses light type questions. I want to know how long I can drive without o2's. I just had my headers put on and I wont be able to get it tuned for a bit. Is there anythjing I should be concerned about?
#2
Moderator
iTrader: (11)
Join Date: Mar 2002
Location: East Central Florida
Posts: 12,605
Likes: 0
Received 6 Likes
on
6 Posts
If you had a really good open loop tune then you could
go without them, indefinitely. Leaving them in, but bent,
is actually the worst of all worlds (for idle / low cruise,
false trimming can be worse than no trimming at all).
But open loop tunes need a fair bit of tweaking of more
stuff, to make them play well across weather and so on.
You may find your tune drifts as the car (mis)learns to
the O2s new behavior w/ headers. Probably see it as
developing an unstable idle and some variable richness
at WOT (as drifting fuel trims jack it).
If the base tune is good then you may be happier with
the O2s out of the picture. Your friendly neighborhood
bunghole sniffing bureaucrat would disagree, of course.
go without them, indefinitely. Leaving them in, but bent,
is actually the worst of all worlds (for idle / low cruise,
false trimming can be worse than no trimming at all).
But open loop tunes need a fair bit of tweaking of more
stuff, to make them play well across weather and so on.
You may find your tune drifts as the car (mis)learns to
the O2s new behavior w/ headers. Probably see it as
developing an unstable idle and some variable richness
at WOT (as drifting fuel trims jack it).
If the base tune is good then you may be happier with
the O2s out of the picture. Your friendly neighborhood
bunghole sniffing bureaucrat would disagree, of course.
#3
TECH Fanatic
iTrader: (3)
Join Date: May 2003
Location: Lake Anna, VA/ Fairmont, WV
Posts: 1,795
Likes: 0
Received 0 Likes
on
0 Posts
I'm assuming you mean rear 02's? They have no bearing on engine performance and only throw the SES light as the PCM detects a malfunction or missing cat. jimmyblue is dead on on the front 02 situation.
Trending Topics
#9
12 Second Club
Thread Starter
iTrader: (1)
Join Date: Jan 2005
Location: Eastern, CT
Posts: 646
Likes: 0
Received 0 Likes
on
0 Posts
front and back o2's i was talking about. I already have an erradic idleanyways. i think it is partly the cold and that i havent gotten it tuned after i swapped in the 400. Thanks for the info. on another thread a guy had said something about burning out your valves because you computer would make your car run too rich.
#10
TECH Addict
iTrader: (3)
Join Date: Nov 2005
Location: Lincoln, NE
Posts: 2,869
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by z28convert
front and back o2's i was talking about. I already have an erradic idleanyways. i think it is partly the cold and that i havent gotten it tuned after i swapped in the 400. Thanks for the info. on another thread a guy had said something about burning out your valves because you computer would make your car run too rich.
#12
TECH Junkie
iTrader: (13)
Join Date: Sep 2004
Location: Fort Myers, FL.
Posts: 3,857
Likes: 0
Received 0 Likes
on
0 Posts
yes they have rear o2's.
you can run on no o2's if you have a great tune and running open loop. But I think you want to know if you can get by for awhile until you can fix the problem, and the answer would be yes, I just wouldn't drive like an idiot.
you can run on no o2's if you have a great tune and running open loop. But I think you want to know if you can get by for awhile until you can fix the problem, and the answer would be yes, I just wouldn't drive like an idiot.