air fuel ratio wont stay tuned
#1
air fuel ratio wont stay tuned
Link ECU. Tune the AFR to a set point. Wideband indicates a certain mixture point. Later, go to the same conditions (rpm, load, temp, etc) and the lambda compensation is having to add fuel. I don't store any auto tune. Get back to that same point later, and the mixture is just fine.
Ideas? I'm thinking flaky fuel pump, clogged fuel filter... Could I have a couple revolutions of misfire on one cyl and not really notice it, thus making the O2 sensor see a lot of oxygen, even though there is enough fuel to burn it?
Ideas? I'm thinking flaky fuel pump, clogged fuel filter... Could I have a couple revolutions of misfire on one cyl and not really notice it, thus making the O2 sensor see a lot of oxygen, even though there is enough fuel to burn it?
#2
Elite Member
iTrader: (3)
Join Date: Apr 2008
Location: Outside Portland Maine
Posts: 2,023
Total Cats: 19
How much compensation is it adding? A couple percent could just be as simple as humidity or something, but a lot could be worth looking into.
Did you or Andrew end up driving that car home last night with no exhaust?
Did you or Andrew end up driving that car home last night with no exhaust?
Thread
Thread Starter
Forum
Replies
Last Post