|
Title: s3 BAM Lagging at overboost. Post by: madswp on October 12, 2012, 07:30:04 AM Hi tuners
This is my first remap of the 8N0906018BH ecu. Engine is standard. The problem is that the engine doesn't perform well between 3000 and 3400 rpm. i can see in my logs that med MAF sensor reading is a little wierd, and the lambda log is making a big spike up and downwards while it shouldnt. the requested lambda is fine. what can cause this behaviour? start to think this is a hardware fault. maybe worn turbo, boost leak, maf, n75 or a slow reading lambda sensor. The fault gets worse if i raise LDRXN at 3000-3400rpm. and totally disappears if i lower it to the standard file configuration. the engine sounds healthy. Cant find anything in my maps that would cause this kind of error. what is your opinion? cheers ;) Title: Re: s3 BAM Lagging at overboost. Post by: madswp on October 12, 2012, 07:58:22 AM could it be becurse of the map sensor reaches max possible reading that would course this?
Title: Re: s3 BAM Lagging at overboost. Post by: nyet on October 12, 2012, 09:44:24 AM You are missing a ton of relevant data in your logs...
actual load, req boost, timing, wg duty Bottom line is, your fueling is screwed probably because the out of control boost is maxing maf/load and the ecu doesn't know what to do. ALWAYS fix boost FIRST, esp overboosting don't wory about anything else till you got that dialed. Title: Re: s3 BAM Lagging at overboost. Post by: madswp on October 13, 2012, 10:18:34 AM thanks for reply nyet.
i flashed stock file and did a lot of LOGs to have something to compare my tune with, and see how engine behaviour is (in case of any hardware fault) logged a lot more of data (have connection error with me7logger if i add more than 25 lines?) but think the most important is logged. my lambda reading are still going a lot up and downwards. about 0.05V. is this normal behaviour? i will try reading some logs of other stock and tuned files here on site and do a little more investigation.. regards :) |