Travis - you asked earlier for a Freescan log. Here you go: http://lexi.mantaur....Run20120513.csv
This was taken back in May.
My notes to Sparky at the time were as follows:
"Finally managed to find a bit of time and some sunny weather yesterday to take the car out for a logged run.
As expected, it drove like a dogs dinner, coughing and spluttering and backfiring in the 2400 to 3200 RPM range under light to medium load.
This is the EXACT behaviour I have always known since I bought the car and makes driving it very unpleasurable !!
Things of note are:
1 - The warm up cycle is still a great improvement since you adjusted the minimum air rate screw - idle is pretty good and it doesn't bog down all the time its in Open Loop.
2 - As soon as it switches to Closed Loop, things start going wrong including the above described issue of holding the throttle steady (whilst stationary) and after a couple of seconds the revs drop dramatically and it backfires and then picks up again and repeats this cycle. The CEL then comes on, reporting the Code 24 as previously described.
3 - At the end of the run (and as previously noted), the engine tends to idle very high (1500rpm ish) despite the desired idle clearly showing 987rpm."