So here is my problem, i have been using the evo 9 tephra rom for a month or so now and since 2 days when i get over 30% throttle my afr goes all rich to 10, iv been logging since then and i always get pretty much the same data. The problem appeared after i cleaned my maf because i had half boost problems. 1 day later my car was running bad and i noticed one of my maf wire had a little cut. So yesturday i repaired the wire and the problem is still there, in my log with evoscan before i cleaned the maf i was seeing constant 0 gm/s and then before i fixed the maf wire i was seeing constant 12.08 gm/s and now with the fixed wire i see constant 492.03 gm/s. I was wondering if it was evoscan that is not logging the gm/s right or is it normal that the gm/s is not moving? Is my maf ****ed up?
Thanks,
alex

 

Airflow hz is what you want to log, if they are not moving then its likely your maf is effed. Since maf is a big part of how the engine determines load my guess is your ecu doesn't know what to do and is just dumping fuel in as a safety precaution

 

My maf hz is moving but my gm/s isin't...any other ideas of what could make it go all rich like that? I also get really high timing advance on cold starts and when i press the gas it missfires....my iat in my maf was sideways before i cleaned it and i got it back straight but in the log the iat changes temperature...i don't know what to look for now...i changed my piping before the turbo also... could an intake leak after the maf not be visible at idle and leak when the turbo sucks air in when i open the throttle?

 

In my logs i see the afr only go to around 12 which is what i usualy get but my wideband shows it all rich 10 afr...my wideband works fine i get the usual 14-15 afr when cruising and at idle.

 

If you still have your stock maf you could try flashing an older tune with your stocker and see if the problem changes or goes away completely. If you still have the same issues then it could be related to something else, maybe the ecu itself. Have you tried resetting the ecu by unhooking the battery?

 

Yes i have, i did it when i fixed my maf wire....i have the evo maf not the stock maf also...i will try reflashing my old AT big map and see how it reacts...and reflash my tephra back in

 

Is "enable airflow calcs" turned on in the Tephra mod list?

 

No it's not.... but i just went to the track and my pressure side coupler got disconnected in a run...i got it back on and when i got back from the track the afrs were fine...idk what's going on...it's so hard to diagnose a modified car -.-

 

It seems like the afrs go rich even at idle sometimes...it acts weird on and off...sometime it boosts to 5 and then to 10 psi randomly

 

Did you make sure you don't have a boost or vacuum leak?

 

My vacuum at idle is around 20-22....so im pretty sure i don'ti have a vacuum leak...

 

Ok so here are the latest news! I have fixed my half boost problem by disabling the map averaging in the tephra mod...but i still have my full rich condition on load/wot. Any ideas?

 

Problem solved, i have tried another member's maf and it fixed it all!!! it seems like our mafs are sensible to cleaning products so make sure you use maf cleaner and not brake cleaner or carb cleaner if you want to clean your maf!!! This is how mine started to act weird.

 

It's practical to have another turbo Lancer living less than 20 miles away, isn't it?