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I mistakenly posted this originally on the General BB and am reposting it here:
Posts on this site have been invaluable in helping me diagnose and resolve several issues with my '01 9-5 wagon (2.3L, 95K miles). However, I've come to a problem that I can't figure out and I need to post my first message.
Several months ago I was on a 200-mile drive at highway speeds (~75 mph) when the car's power suddenly began waning and surging. I had the cruise on, so the throttle input was steady. I could sit there and just watch the RPM needle and especially the turbo needle fluctuate up and down. It felt like someone was driving who couldn't keep a steady foot on the gas (a major pet peeve, by the way). I took the cruise off and just used the gas peddle to see if it was a cruise control problem, but that made no difference. I made it home and promptly searched everything I could find on saabnet for some solutions.
The first thing I did was to clean the TB. That improved things slightly for only a couple weeks, so I did it again and the second time it didn't seem to really help. I then put Techron in the gas tank, checked the air filter, re-adjusted the gap settings on my spark plugs, checked vacuum hoses, all the little things I could think of. Nothing helped, so I eventually put in a re-manufactured TB, sure that would do it. It actually got worse, would hardly start, tried to stall at stop lights. The CEL eventually came on and threw the codes P1231, P1251, P1260. The "TCS Off" light came on and it was apparent that the TB had gone into limp home mode. I reset the limp home mode and the car went back to working as well as it had with the original TB.
So the question is, has it been the TB all along and my re-manufactured one is bad too, or is it something else? I ordered a new crankshaft position sensor after the car was stalling/not starting, but haven't put it in because that problem ended up being the limp home mode. The waning/surging hasn't gotten worse in the last couple weeks and it hasn't gone back into LHM, but it hasn't gotten better either. The TB has a warranty. Should I send it back and try another one?
Sorry the message is so long. Thanks in advance for your help.
--Marcus
posted by 71.115.92...
, Thu, 2 Aug 2007 15:07:38
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