Ok guys.I'm new to making posts,I usually just read and make purchases.I own a 08 evo IIIV with some mods. It has 156000 miles,s1 cams,big front mount,IC piping,turbonetic rapter bov,mynes tube manifold,custom gt3076@ 26lbs,gsc beehive springs,ported stock intake manifold,RC 750cc injectors,3in TBE,walbro 255 lph. About a year ago at idle the afr dips rich.I checked everything i can think,the only thing i could find out was the injector duty cycle and pulse width shoots up when it happens in my logs.Does anyone have any idea?

 

Come on guys... Nobody has any ideas? I'd like to here some input

 

Have you done some of the basics ...........boost leak, spark plugs...etc?

 

of course. It only does it at idle no other time...All the fuel trims are perfect.No codes.No boost leaks.No issue with cruize what so ever

 

No misfiring either.It's just while idling it spikes rich.In my logs all i can see is duty cycle jumps really quik and then the car tries to adjust as fast as it can.

 

Are you maf or sd? Post a log please.

 

It's Maf still.I will post up a log later on when i get off of work.

 

What format does the log file have to be in to upload it here?

 

EvoScanDataLog_2013.04.08_09.54.44.zip
Here's my log

 

might be an o2 sensor. this happened to me before and it didnt throw a code until about two weeks later

 

It's been doing it for about a year and i have never got an o2 code.What about a cam sensor?