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Old 01-10-2019, 01:20 PM
andrewwynn's Avatar
Join Date: Jun 2015
Location: Racine, WI
Posts: 4,501
andrewwynn is on a distinguished road
I think I'm going to +1 on the MAF.

Been chasing some quirks for months and I read a clue that when long term fuel trim is opposite polarity of short term it's likely MAF related.

I swapped mine and wife's MAF and my O2 readings started behaving better and within a few days she got a similar error I've been chasing on mine.

I just ordered a new Siemens MAF from eBay for under $90 I'll report back if it shows up and not actual Siemens brand
E53 / M54 2001 3.0i gas LHD (pair of them: his & her)
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Old 01-10-2019, 02:01 PM
Join Date: Jan 2019
Location: Richmond, VA
Posts: 51
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Originally Posted by upallnight View Post
Hate to tell you but that reservoir next to the oil filter is not for the trans. It's the reservoir for the power steering fluid. Get an owner manual and read it.
Thanks, that was answered on post #7. Andrew was kind enough to inform me.
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Old 01-10-2019, 02:04 PM
Join Date: Jan 2019
Location: Richmond, VA
Posts: 51
Siggy is on a distinguished road
Originally Posted by andrewwynn View Post

I recorded a dip down to about 13 v when coming to a stop.

Can you graph like this with your scanner. It's probably normal to get a half volt drop but not a 1v drop. I got drops to about 12v when my alternator slip rings while being worn out also got coated in oil. I replaced the rings and brushes and no problems since.
Yes, that's the graph I was recording when I saw the dip in voltage. However, when I go into the scanner and pull up saved data, it won't show the graph, it just shows data points and you page forward and backward to go through the timeline.

I'm sure there's no harm in putting a new MAF on. I think I'll try that. It's 144,000 miles now so I'm sure it's something that will need replacing sooner or later anyway.
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