not sure why Engine not entering PE mode during aceleration?
10-24-2012, 09:28 AM
#1
TECH Apprentice
Thread Starter
iTrader: (6)
Join Date: May 2003
Location: Fairfax County, VA (You know you're here when you see the bad roads)
Posts: 377
Likes: 0
Received 0 Likes
on
0 Posts
not sure why Engine not entering PE mode during aceleration? Well, I thought I had my tune squared away. I wrote my modified VE and MAF tables back to my stock tune, along with my new commanded pe enrichment, etc. Well everything looks good except when I mash down the throttle I stay around 14.7, which is my closed loop commanded afr. I can see in the my scan that the commanded afr during acceleration is 12.8, which is what it should be, but my afr never shifts towards that number and stays at close to my closed loop afr. Can anyone help me out with this? My tune and log file are attached.
Thanks!!
Thanks!!
10-24-2012, 07:09 PM
#2
TECH Apprentice
Thread Starter
iTrader: (6)
Join Date: May 2003
Location: Fairfax County, VA (You know you're here when you see the bad roads)
Posts: 377
Likes: 0
Received 0 Likes
on
0 Posts
Update*help!*
Well I tried modifying my VE table with the AFR error listed in the scan above. In thg higher RPM/MAP levels I increased VE on the order of 10%. reflashed and went for a drive to scan again, and I got the exact same AFR error levels again...like my newly modified VE table was completely irrelevant. What it looks like is that when I enter PE mode or open loop, my computer is still commanding the closed loop fueling. That may be way off...but its my best guess. And the MAF shouldnt matter at that point right? All NON PE scanning data is dead on accurate, only when I go WOT do I see the discrepancy AND, adjusting the VE table seems to have zero impact.
Well I tried modifying my VE table with the AFR error listed in the scan above. In thg higher RPM/MAP levels I increased VE on the order of 10%. reflashed and went for a drive to scan again, and I got the exact same AFR error levels again...like my newly modified VE table was completely irrelevant. What it looks like is that when I enter PE mode or open loop, my computer is still commanding the closed loop fueling. That may be way off...but its my best guess. And the MAF shouldnt matter at that point right? All NON PE scanning data is dead on accurate, only when I go WOT do I see the discrepancy AND, adjusting the VE table seems to have zero impact.
