I recently installed an ap with the maperformance stage 1 ots map on my 17 wrx and i love it so far. While driving i am seeing 25 and 25 af 1 correction not while at idle.
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Af correction 1 at idle. So i had to richen it up a pinch and turn the idle up to about 950. Af learning 1 a. Im regularly seeing af correction numbers as highlow as 16xx and im curious if this is normal as ive read that there can be issues with high af correction numbers. Af learning 1 d. 31 31 stays more positive than negative usually 8 16 but fluctuates constantly i assume thats normal edit. You can have this value all day long but you have to compare it to the fuel trim states in relation to rpm tps ect air temp knock correction the rear o2 maf and map.
Definately check for exhaust leaks air could easily be back feeding into your open downpipe giving leaner than normal readings. Having the 272s 147 while idling will cause it to surge. 0 5 grams per second. At idle at stop lights it jumps up to 95 and at wot it is at 00 or close to it. All of a sudden my af learning 1 is at 135 while cruising at any speed if im in the city cruising on a city road at 30 moh or on the highway doing 70 mph. This covers most of your cruising.
My correction is anywhere from 7878 to 77 or so when idling after start up when i idle after driving for a while it will stay around 7878 to 77 for a bit then slowly rise up anywhere from 1010 to 1515 and will stay there for a bit and the afr will remain around 13 to 147. Af learning hasnt gone beyond 7xx and 2xx if im remembering. With my ems i have to keep the idle between 134 139 afr. The af on yours should be steady at about 22v or if the tool shows lambda between 998 and 11 lambda. This is light acceleration or cruising uphill. Af learning 1 b.
Af 1 learning a 93 af 1 learning b 9 af 1 learning c 65 af 1 learning d 10 af 1 learning. When idling it stays closer to 147 usually. A little more than idle but so low its difficult to reach with the car in gear2 af learning 1 c.
Gallery of Af Correction 1 At Idle
