camas90gsx
10+ Year Contributor
- 234
- 0
- Jul 16, 2011
-
seaside,
Oregon
Ok first i will start out wit5h my setup.It is a 90 tsi awd with a 20g,880cc precisions,3g maf,afpr,wally 255,greddy rs bov,3inch turbo back no cat,on a dual map chip for e-85 and pump gas with injector/maf comp,factory boost gauge to knock gauge conversion,etc...
Yesterday i went to the beach which is a 90 mile drive,and on the way to the gas station it was running faster than ever.Then i stopped to fill up on e-85 and hit the road.I wasnt relly getting on it and didnt notice any change the rest of the way to the beach.Then when we got there and i noticed that when i ould get above 4k rpm's it would go to 10 on the wideband and then blink out fully rich and start to hesitate and knock until i let off.So the rest of the way home i just tried to keep it below 4k rpm's,and it would drive normal and sit at 15-15.2 afr while cruising,which is what we have it tuned for at cruising on the e85 tune.
So i got home and reset my ecu,checked my my fuel pressure which was at 39,boost leak test,checked all fuel lines,and checked all connections to the ecu and everything seems good.But when i drove it this morning it sits at 15 afr at idle,15 afrat cruising,but if i get it above 2750 rpms to accelerate it shoots up to 10 afr then fully rich and stutters and hesitates until i let off.
I am totally stumped as to what this could be.All i have done since this started is fill the tank with e-85,fix the adjustment screw on my bov(i have clearance issues with the hood hitting the bov)and i also added 3 ounces of seafoam to my gas before i took off that morning,which is probably not even worth mentioning,
.
The only thing i can come up with is that maybe the e-85 was a really weak batch,which would cause it to run rich if the ethanol% is really low.Or maybe something to do with my ecu or tune.Please chime in if you have any ideas of where i should go from here.Like i said its fine at idle and cruising,just goes pig rich when accelerating? Im stumped y'all,and it's probably just something stupid causing it too.
Yesterday i went to the beach which is a 90 mile drive,and on the way to the gas station it was running faster than ever.Then i stopped to fill up on e-85 and hit the road.I wasnt relly getting on it and didnt notice any change the rest of the way to the beach.Then when we got there and i noticed that when i ould get above 4k rpm's it would go to 10 on the wideband and then blink out fully rich and start to hesitate and knock until i let off.So the rest of the way home i just tried to keep it below 4k rpm's,and it would drive normal and sit at 15-15.2 afr while cruising,which is what we have it tuned for at cruising on the e85 tune.
So i got home and reset my ecu,checked my my fuel pressure which was at 39,boost leak test,checked all fuel lines,and checked all connections to the ecu and everything seems good.But when i drove it this morning it sits at 15 afr at idle,15 afrat cruising,but if i get it above 2750 rpms to accelerate it shoots up to 10 afr then fully rich and stutters and hesitates until i let off.
I am totally stumped as to what this could be.All i have done since this started is fill the tank with e-85,fix the adjustment screw on my bov(i have clearance issues with the hood hitting the bov)and i also added 3 ounces of seafoam to my gas before i took off that morning,which is probably not even worth mentioning,
. The only thing i can come up with is that maybe the e-85 was a really weak batch,which would cause it to run rich if the ethanol% is really low.Or maybe something to do with my ecu or tune.Please chime in if you have any ideas of where i should go from here.Like i said its fine at idle and cruising,just goes pig rich when accelerating? Im stumped y'all,and it's probably just something stupid causing it too.
