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Old Jun 24, 2009, 07:32 PM   #1
nitz
Evolving Member
Personal Sales Rating: (3)
 
Join Date: Sep 2005
Location: MIA
Posts: 367

Drives: 2005 EVO RS

sudden enrichment and stalling

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.


Last edited by nitz; Jun 24, 2009 at 07:34 PM.
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