smbgsx
Proven Member
- 225
- 42
- Apr 15, 2017
-
Richfield,
Minnesota
I just switched to e85 and had a tune done. the car pulls good and cruises very good 99% of the time. there are some issues that have started recently though including...
when I go WOT I have a stumble/miss at 6500 basically on the dot everytime. the whole fuel system was just redone and I switched to ecmlink's SD kit with the Omni 4-bar MAP sensor. I've went through about 4 tanks of gas before all this started happening.
some other things I've noticed are...
high (sometimes irradic) idle (1500-2000 depending on outside temp and if I sit in traffic)
some minor bucking at low load/rpm and low throttle.
ecmlink says my throttle position is at 10% when I'm totally off the pedal.
ecmlink's AFRestimate seems crazy lean to me, sometimes 21.4:1. I do have a wideband that's reporting 14.7ish at idle. (which i'm assuming is just the controller multiplying whatever lambda its getting by 14.7 for the analog gauge reading. i'd think with typical e85 id be idling around 10:1 maybe)
the new fuel system consists of a full blown billet dual pump hangar with braided -8 feed/ -6 return
walbro 450LPH rewired directly to the battery, ID1700cc injectors with magnus rail.
aeromotive A1000 regulator (which was used but seems to be working well)
ignition coils were new and only have about 400 miles on them.
I have a datalog of a few pulls and you can see the 02 voltage drop at 6500rpm under load. i'm not very experienced with diagnosis of datalogs and would appreciate any help I get. in the meantime would these be appropriate to start with??
-check plugs for fouling or maybe decrease gap (BPR7ES)
-could a failing alternator cause a current drop large enough to not supply proper voltage to the fuel pump or ignition coils and cause a miss under load?
when I go WOT I have a stumble/miss at 6500 basically on the dot everytime. the whole fuel system was just redone and I switched to ecmlink's SD kit with the Omni 4-bar MAP sensor. I've went through about 4 tanks of gas before all this started happening.
some other things I've noticed are...
high (sometimes irradic) idle (1500-2000 depending on outside temp and if I sit in traffic)
some minor bucking at low load/rpm and low throttle.
ecmlink says my throttle position is at 10% when I'm totally off the pedal.
ecmlink's AFRestimate seems crazy lean to me, sometimes 21.4:1. I do have a wideband that's reporting 14.7ish at idle. (which i'm assuming is just the controller multiplying whatever lambda its getting by 14.7 for the analog gauge reading. i'd think with typical e85 id be idling around 10:1 maybe)
the new fuel system consists of a full blown billet dual pump hangar with braided -8 feed/ -6 return
walbro 450LPH rewired directly to the battery, ID1700cc injectors with magnus rail.
aeromotive A1000 regulator (which was used but seems to be working well)
ignition coils were new and only have about 400 miles on them.
I have a datalog of a few pulls and you can see the 02 voltage drop at 6500rpm under load. i'm not very experienced with diagnosis of datalogs and would appreciate any help I get. in the meantime would these be appropriate to start with??
-check plugs for fouling or maybe decrease gap (BPR7ES)
-could a failing alternator cause a current drop large enough to not supply proper voltage to the fuel pump or ignition coils and cause a miss under load?