Erratic idle PLUS jerk/hesitation while cruising...
01-28-2010, 04:48 PM
#21
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if its been happening all the time; at idle you probably have a lean spot. it'll hunt up and down between cells trying to correct itself. and while driving; you probably have a lean spot there as well. try to take note of what rpm and vacuum you are at when it hesitates. then change the values in that cell on your map until it stabilizes. most times its a lean spot.
01-28-2010, 05:38 PM
#22
I've got this same issue...I'm HKS FCon + GReddy TT...I actually have O2 sensor faults...6 of them. Now I highly doubt all my O2 sensors are failed...possibly the fault was set once upon a time and is still causing issues? I need to get the fault cleared and see if it comes back...but this weekend I'll take a look and see if I find any other things wrong.
Basically, under heavy throttle I have no issues at all, but idle sometimes bounces up and down, and while cruising with barely any throttle I'll get random hesitations.
Also, my wideband reads AFRs in the mid 14s while cruising, 12s in boost, so I'm pretty sure I'm fine on that.
Has anyone found a for sure cause of this?
Basically, under heavy throttle I have no issues at all, but idle sometimes bounces up and down, and while cruising with barely any throttle I'll get random hesitations.
Also, my wideband reads AFRs in the mid 14s while cruising, 12s in boost, so I'm pretty sure I'm fine on that.
Has anyone found a for sure cause of this?
01-28-2010, 10:17 PM
#23
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Yeah I'm gonna do some work on Saturday, take a look at the 02S wiring, and clear the faults, see what comes back, etc.
I'll let you guys know if I find anything.
I'll let you guys know if I find anything.
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