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Numerous OBD codes and now rough idling (long)

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I will try to make this as concise as possible. I've been struggling with P1128 and P1130 for the last few months ('00 986 - only owner). Unfortunately, I'm now delinquent on my tags because my car won't pass emissions. I have researched 1128 and 1130, and have tried everything from new oil filler cap, gas cap, etc. Last week, I bought the oil fill tube (as mentioned in TSB 1715) but haven't had a chance to replace it. For the last few weeks, I've been clearing these codes with my Actron 9135, hoping that my "I/M Monitors" will magically turn to "Ready" and I can go get my inspection done.

Well, now it appears that this situation has gotten worse. This week, I started getting P1119 (for which I can find almost no information) and P0150. I figured these were simply artifacts from the 1128 and 1130 codes (or because I kept clearing them). Initially, it didn't really bother me - I figured I'd replace the oil filler tube and my issues would go away. Well, today, I noticed some concerning idling out of my car. As I'm coming to a stop, depressing the clutch drops the RPMs to about 600. At that point, the car begins to vibrate as if it's going to stall. The RPMs don't appear to drop below 600, but as soon as they go above, say, 800, the car idles smoothly. It's at the point now that it will take a while to correct itself, only to start idling poorly within a few minutes (at speed, it appears that there's a slight "lunging" as I accelerate).

Anyway, I'm really not sure what my next steps should be. I will look at the oil fill tube this weekend, but I'm not convinced that this is all of a sudden related to my poor idling. I cleaned the MAF about 4 weeks ago, and my CEL problem was not resolved. However, I will clean it again to see if the idling issue clears up. Beyond that, I'm clueless. Any help would be greatly appreciated.

Also, perhaps related, I'm not sure - I had condensation above my coolant tank in the trunk. To fix this, I removed the bleeder valve and replaced the o-rings within. I did this Tuesday, but didn't have the idling problem until today.

Terence (tarh33l)

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