Quote:
Originally Posted by upallnight
I use an App called Torque Pro (only $4.99) with either my Android phone or tablet to monitor live data. Much easier than a laptop in the car. I keep the bluetooth scanner with the car so if I get a check engine light when I am out driving I can use my phone to read the code and monitor live data.
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upallnight, thanks for the headsup on Torque Pro. I bought it and a bluetooth obd scanner and i've been monitoring for a little over a week.
the stumble on startup and idle is still intermittent. after cleaning the DISA valve the frequency of occurrence diminished some, but i'm still seeing the symptoms every couple of days.
still getting no check engine lights or fault codes. car still runs great. i've been monitoring short and long term fuel trims and i'm not seeing any indications of a big vacuum leak. bank 1 long term stays between 1.6 and 1.9 and bank 2 stays between 2.6 and 3.1. the short term fuel trims at idle look pretty normal, usually varying between positive and negative values that get closer to zero once the car sits for a minute at idle. at this point i'm assuming i must have some really small leak that is only rearing its head at certain temps? i've also been monitoring the o2 sensor voltages and all 4 stay between .1V and .9V at any given time.
a former bmw tech i know suggested doing the CCV and all related lines since it has never been done on my car and i'm approaching 140k on the clock. given that my line going to the dipstick tube is pretty oil-soaked, i figured it can't hurt to do this job, anyways. i am going to do the replacement this weekend and post back with the results. i'm hoping it takes care of the issue.
thanks again for the feedback-