The continuing saga of the random miss

Post your E12 technical questions and comments here. Please, no off-topic posts.

Moderators: Mike W., Pierre

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Lenny D.
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Post by Lenny D. »

OK, y'all are forgiven... 8)

Be thankful for the epiphany. You could still be looking.....but I seem to remember posting something about throwing too many darts at a time without evaluating the outcome. Oh well...

Re: removing the female connectors - a) if they are secure, (i.e., they don't push back out of the housing when pulled on from the harness end), leave 'em alone. That is, upon inspecting the wire crimp for integrity, and making sure none of the wires are touching each other, etc. then I might begin to suspect a spot of compromised wire(s) from the tug (whole 'nother issue). b) if they are NOT secure, pull one back out of the housing. There is one tiny sliver of metal that protrudes from the connector. That is the only thing that secures the connector to the housing by way of a 'stop' inside the housing, and when the connector is inserted, it 'clicks' into place theoretically securing it under 'normal' circumstances - A 'one-time' deal. c) if they are just depressed, cheer them up with a slight bend to make them stick out farther and reinsert into the housing. d) if they are missing, broken (you must try and find the missing tang - look inside the housing; you don't want a sliver of metal hangin' 'round messin' up anything else), you must replace the connector - solder it onto the wire. Make sure the new one's little metal tangs are protruding nicely before insertion (hoo boy...) :mrgreen: You'll have to look at either another one inserted properly or look in the housing to see how to orient the little tab into the housing.

You can remove them from the housing by sticking something like a tiny jeweler's screwdriver into the housing to depress the tab enough to allow the connector to be extracted. Then of course, you risk breaking it altogether by having to bend it back out before inserting it (again). Or worse, having the tab be stressed just enough that upon insertion, it breaks inside the housing, leaving you with the same (or worse) condition, and another problem of wayward metal (and here's you thinking you did good by 'fixing' it; an example of the 20/20 foresight for which we should all spend a lifetime fine-tuning our glasses). :wink:

I would still quadruple check your wiper board integrity.

Good luck

A pic is worth a thousand words dept.:

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HTH

'80 528i
jayne58
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Joined: Thu Jul 23, 2009 11:14 pm
Location: orange county, CA

Post by jayne58 »

Hey guys,

I just read this thread and my car is a family member of Brian's, that is missing randomly. I tested the AFM grounding in my 81 528i and found out that it is not grounded to the body. For the sake of testing can I directly run a wire from the batt (-) to the AFM? I just want to make sure I don't fry the ever delicate AFM.

Jayne :(
1981 528i, 5 speed
2005 530i
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Pierre
Posts: 263
Joined: Tue Jan 06, 2009 11:02 pm
Location: Camarillo, CA

Post by Pierre »

jayne58 wrote:Hey guys,

I just read this thread and my car is a family member of Brian's, that is missing randomly. I tested the AFM grounding in my 81 528i and found out that it is not grounded to the body. For the sake of testing can I directly run a wire from the batt (-) to the AFM? I just want to make sure I don't fry the ever delicate AFM.

Jayne :(
Just run a wire from the AFM body to anywhere on the car body. You do not need to go all the way to the battery. The body is grounded to the battery negative anyway.
Pierre in Camarillo
76 530i (3.3), 69 2002 (M20), 74 tii, 75 2002, 79 323i, 84 733i, 84 323i (S52), 91 318is, 96 318ti (S52), 97 Z3, 01 540i, 02 330i, 02 1150RTP.
OO==00==OO
jayne58
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Joined: Thu Jul 23, 2009 11:14 pm
Location: orange county, CA

Post by jayne58 »

Thanks Pierre i will do it first thing tomorrow.
1981 528i, 5 speed
2005 530i
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1st 5er
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Re: Another attempt at final update

Post by 1st 5er »

grumpsjr wrote: So, we ran a ground wire from one of the airbox mounting bolts to the body. After 50 miles, no misfire, period.
Brian
Finally got around to installing this upgrade and it's either running better or my imagination is improving.
Time will tell which.

Has this turned out to be a permanent fix for others?
Sherman

TexFest LSB&F V

95 525iT (Her DD)
92 ///M5 (????)
91 ///M5 (T donor)
88 ///M5 (Das Beast)
86 535i (Snob)
79 528i (1st 5er)
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