Running Rich .. Then lean.. Log file attached

[98mitsubishigst]

It started on way home from the dsm shootout. ill go over a fast story of what it did.. and summary of mods.

I left the shootout and drove 2 hours and all of a sudden i noticed my wideband reading 16-17/1 and straight red.. i couldn't hit boost, and i could barely move because it felt like it was falling on its face.. I got home and checked my plugs and noticed my plug gaps were all of and changed them all back to .028.. My tune is fine, its been the same one i have had for 3 years now and never gave me any issues..

Well today; i tried pulling the car out after a month since the shootout and the car idles at 14/1 when its normally at 15/1ish roughly. Then when trying to drive the car it cruises at 12/1 when it normally cruises around 14-15/1 and the car bogs.. And the one time the car decided to act normal, i hit boost around 10psi and my wideband went to 17/1 and let off a huge backfire.. When coming to a stop, put the clutch in and the car stalls.. What could it be? Log is attached.. Check out my 02 sensor, is it working right?

Mods/recent maintenance

New plugs/wires
Oil change
new 255 fuel pump/AFPR
newer 02 sensor... (check log on this for me please)
no boost leaks

dsmlink v2.5, 1200cc injectors, 255 pump, afpr, 16g turbo, all bolt ons

 

[8urzr1]

something has happened to the tune MAJORLY!![DOUBLEPOST=1412028948][/DOUBLEPOST]You need to add open and closed loop to your logs.. also at those coolant temps the engine should be in closed loop meaning the o2 sensor should be cycling from what I see there is no o2 cycle also don't see any fuel trim info whatsoever.. mafraw no info and also the airflow per rev is not showing anything at all... Do you know what your looking at? or how to fix any of this?[DOUBLEPOST=1412029499][/DOUBLEPOST]The tune is not at all fine... with the data that you have posted in the log. something has happened possibly could be the ecu or ecmlink itself. I can walk you threw some steps to try to find out whats going on possibly... But you may be up the creek without a paddle from what im seeing... im no pro tuner and do not claim to be,but I however do know somewhat of what im looking at and the main concepts and functionality of ecmlink. Any check engine lite on? What kind of air metering are you using 1g 2g evo mas gm3in or speed density setup??[DOUBLEPOST=1412029954][/DOUBLEPOST]Also I notice that the int temp is -71 degrees leads me to believe air metering is the culprit. check your plugs for the maf check for broken wires there should be a cel in ecmlink if there is an issue there. Also no airflow no maf signal your issue lies there somewhere my friend do some looking around and get back to me

 

[cudadrt]

Have you pulled the ecu and checked for a burnt ground trace? The -71 intake temp makes me suspicious of the ecu.

 

[johneclipse]

-71 is what the ecu defaults to if the IAT sensor is bad fyi. Check your sensors wires and replace.