30FF only during highway passing; Most likely cause?
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My Ride: E61
Model Year: 2008
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I get a check engine/reduced power warning when I really get on the throttle. Low boost. Searching lists a number of potential sources, but also a number of different presentations. Idle is fine, and I wouldn't know anything was wrong during normal driving. I've gotta get on it for it to happen. I'm planning to replace the vacuum lines because they're cheap and it's time ('08 w/ 95K miles), but I'm not familiar enough with the systems' function to know if that's actually a likely fix. Is there anyone more familiar with the induction systems' workings that can point me in the right/most likely direction given the presentation?
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Do you have any wastegate rattle? I found that when my wastegates were shot I would get a 30FF when I gave more than 1/2 throttle around 2,400 RPM. Sounds like that could be your highway speed?
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No rattle that I've noticed, and I'm the sort that notices that sort of thing for sure. Mine is RPM dependent; speed doesn't matter (though I've never done it in neutral or anything like that).
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Munich77
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01-11-2010 02:02 PM