wideband sensor getting to HOT?
06-27-2009, 10:16 AM
#1
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wideband sensor getting to HOT? I'm noticing after an hour of logging and making changes that my LM1 is going way lean(19-20AF) at idle, when I start the logging process when everything is cool(but up to coolant temp of 200f) my idle after is perfect 14.3-14.6.
Once the WB is hot, the af creeps up. When I start moving I get more realistic af values but once I stop for a traffic light the af slowly creeps up from my near perfect numbers.
WB is in the I pipe.
From my searching on here I have found others with the same problem but really no luck in fabbing up a heatsink.
My car has Long tube headers, off road ypipe and an airlid so I won't think I'd have this many problems.
Any suggestions.
Once the WB is hot, the af creeps up. When I start moving I get more realistic af values but once I stop for a traffic light the af slowly creeps up from my near perfect numbers.
WB is in the I pipe.
From my searching on here I have found others with the same problem but really no luck in fabbing up a heatsink.
My car has Long tube headers, off road ypipe and an airlid so I won't think I'd have this many problems.
Any suggestions.
06-27-2009, 07:37 PM
#4
High IAT will lean out the mixture.
In OL this is most dramatic, filter out IAT above 95°F.
Without filtering out high IAT you can over adjust resulting in rich AFR and
that can have you going in circles for a while.
The WBO2 can't overheat in the Ipipe.
In OL this is most dramatic, filter out IAT above 95°F.
Without filtering out high IAT you can over adjust resulting in rich AFR and
that can have you going in circles for a while.
The WBO2 can't overheat in the Ipipe.
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06-29-2009, 09:16 AM
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I see IAT leaning out my idle mixture too, been in
open loop SD mode for a while now tweaking every
other weekend. IAT gets heated differently than
the real air temp, by engine bay heat conduction,
but that's about all you can say.
open loop SD mode for a while now tweaking every
other weekend. IAT gets heated differently than
the real air temp, by engine bay heat conduction,
but that's about all you can say.
