If you have a scangauge hooked up and you're driving on a steady road can you adjust the efie to improve mileage,assuming you have other goodies hooked up?
Yes, you can adjust them while driving. Doesn't matter what other goodies you have hooked up, it will still affect the scangauge readings. Most EFIE's will take a short time for the voltage to come up or down so you may not see the results instantaneously as you turn the knob.
about how long does it take? a minute or 2? Also, does one of those O2 extenders help with mileage any?
Duration for voltage to come up or down depends on temperature. In warmer weather it will come up faster. I'd say at ~80* F ambient it will stabilize within about 3-6 minutes.
My understanding of the O2 sensor extenders was to make the O2 sensor believe the exhaust was leaner. This would be counter productive for mileage gains as the ECU would add fuel in this case. I've mainly heard of people using the O2 extenders on the post cat O2 sensors when the cats have been eliminated so the ECU doesn't know the cats were removed. The post O2's need to see a slightly leaner condition than the post O2 sensor. Someone correct me if I am wrong on this one, but that is what I understand.
My understanding of the O2 sensors was to make the O2 sensor believe the exhaust was leaner. This would be counter productive for mileage gains as the ECU would add fuel in this case. /quote]no, i believe the efie is to add voltage, so that the 02 sensor thinks it's running richer,therefore making it run leaner.
I might be mistaken but I thought that the idea behind the O2 sensor mounting extenders was to remove the O2 sensor from the direct exhaust stream.In doing so it would be be less exposed to the exhaust mixture and therefore interpret that condition as LESS oxygen hence a RICH condition ie a higher voltage output. This will cause the ECU to reduce the injector pulse width and therefore run the engine leaner with subsequent mileage gains.
All of this obviously only while in closed loop and within desired parameters of drivability. I'd be happy to get further input from anyone who has used the extenders purely for economy gains and results please.
[quote="daves66nova"]no, i believe the efie is to add voltage, so that the 02 sensor thinks it's running richer,therefore making it run leaner.[/quote]
I'm very familiar with the EFIE, I'm referring to the O2 extenders.
What gauge are you watching for the adjustment to affect?
I'll be watching my scanguage.
HI just a note about setting your EFIE while driving ..for this car 05buick it settles down to about 44 mpg. after about 80 miles of driving ** just before it goes back into open loop and that make me think the 02 censor is set by factory specs too much rich ! anyway according to its canguagell read out & and if thats for real...and thats on near as level road..at 55 mph ..and with out my HHO connected....soooo hopefully when i get my p w m (voltage reducer. i,ll have more effiency results to post [-o< oh seems like ever car & truck has it own limits to work around.... good luck to all don...