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Old 11-07-2012, 01:09 PM   #29
nola mike
Registered User
Join Date: Jul 2011
Location: Richmond, VA
Posts: 70
My Ride: 2001 330 CiC
Well, we're certainly good enough for now. Everything I've read says that LTFTs less than 8 or even 10 are OK. The fact that the STFTs are just about 0 at idle tells me that I don't have much if any remaining vacuum leak. Though I always thought that the LTFTs were just averaging the STFTs over time. Doesn't look like this is the case necessarily. Also, my LTFTs go down when I'm cruising 80+ on the highway, and seem to increase at 50-60 mph back roads--but that may make sense, as I'm not steady-state on those roads. Lastly, I did replace the dipstick o-rink and DISA o-ring. Oh, and I'm not at all concerned with O2 sensors--that was covered earlier in the thread. My scanner has an O2 sensor test mode that checks the reaction speed, and they check out. Although a code should be thrown anyway for a lazy sensor.
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