I've been having an ongoing shudder at partial throttle under load for a while now. Initially I thought it might be a TCC lockup issue, but the tranny and TC have been swapped out since August for a different reason, and while she shifts like a dream, it did nothing to alleviate the shudder.
I know I sometimes trip Code 32 (EGR valve) which I haven't addressed yet, and since the tranny swap I've got a lean condition on the driver's side o2 sensor thanks to a badly re-installed gasket upstream.
However, I've had this shudder since before both those issues..
The log was taken on the highway portion of my commute to work, and the first shudder starts about a minute in.. another one about 30 secs to a min later, then a couple more throughout the run.
It's pretty easy to spot where it's happening - spark retard jumps through the roof.
So yeah, I know the basics of what to look for, but any gurus want to give it a shot and maybe point me in the right direction to fix it once and for all?
https://www.dropbox.com/s/423i64ktpjn9mkn/94 Cad 12-02-13.uni
I know I sometimes trip Code 32 (EGR valve) which I haven't addressed yet, and since the tranny swap I've got a lean condition on the driver's side o2 sensor thanks to a badly re-installed gasket upstream.
However, I've had this shudder since before both those issues..
The log was taken on the highway portion of my commute to work, and the first shudder starts about a minute in.. another one about 30 secs to a min later, then a couple more throughout the run.
It's pretty easy to spot where it's happening - spark retard jumps through the roof.
So yeah, I know the basics of what to look for, but any gurus want to give it a shot and maybe point me in the right direction to fix it once and for all?
https://www.dropbox.com/s/423i64ktpjn9mkn/94 Cad 12-02-13.uni