View Single Post
Old Jun 24, 2009, 09:37 PM   #7
casper980
Evolving Member
Personal Sales Rating: (2)
2003 Mitsubishi Lancer Evolution
 
casper980's Avatar
 
Join Date: Mar 2004
Location: SE Michigan
Posts: 381

Drives: '03 Evo VIII, '91 240sx HB

Quote:
Originally Posted by nitz View Post
looking through all the threads about stalling there are suggestions covering BOV, ISCV tables, MAF scaling, BISS, ROMs etc etc that all could contribute to stalling issues (very overwhelming). in my case when one does a quickish start from standstill and immediately depress the clutch, the idle will suddenly drop and afr goes rich. it does catch itself sometimes and may peg to 2K rpm after slowly coming down. Most times it just goes rich and stalls or hovers at 10 afr and comes back up. it seems to be happening more and more often. it's almost as if the MAF detects more air than really present and fuel is dumped. below is evoscan log, notice the odd 96 load area and increased airflow once the stumbling starts even though off throttle (14% is off throttle). any pointers would really help. i've done a boost leak test and switched back to stock plastic bov with no changes. the car is a 2.3 with revolvers and an intake.

Upgrade the CPU Autronic in Nice...as long as you have someone reputable to tune it.
Offline
 
Reply With Quote