Search found 84 matches

by 528i-1981
Sat May 11, 2019 10:29 am
Forum: Tech Forum
Topic: Digital Clock Stuck at 1:00
Replies: 5
Views: 34

Re: Digital Clock Stuck at 1:00

This is what worked for me, yes. It would be great to have a second data point.
by 528i-1981
Thu May 09, 2019 9:45 pm
Forum: Tech Forum
Topic: Digital Clock Stuck at 1:00
Replies: 5
Views: 34

Re: Digital Clock Stuck at 1:00

Solved. I pulled the fuse in and out multiple times to no avail. I also fiddled with the hazard switch and it was working fine and did not affect the clock's situation. I disconnected and reconnected the negative lead a few times, but the clock remained stuck and unresponsive. I then connected the (...
by 528i-1981
Tue May 07, 2019 4:45 pm
Forum: Tech Forum
Topic: Digital Clock Stuck at 1:00
Replies: 5
Views: 34

Digital Clock Stuck at 1:00

The battery was disconnected for awhile and now the clock is stuck at 1:00 and unresponsive. Other boards (E21) report this problem and suggest pulling the fuse multiple times. Sounds unscientific. Others suggest disconnecting the battery negative terminal and touching it to the positive terminal to...
by 528i-1981
Tue May 07, 2019 4:27 am
Forum: Tech Forum
Topic: Crash/impact sensor location
Replies: 3
Views: 30

Re: Crash/impact sensor location

If you're crossing through the dash anyway, you could use the dummy button where the rear foglight switch goes for your switch. Unless your E12 is euro-spec. My US-spec car has two breakers mounted on the knee panel for the fog lights. You could use push-type mini-switches instead. Another place mig...
by 528i-1981
Mon May 06, 2019 4:23 am
Forum: Tech Forum
Topic: VIN Plate and Rust Repair
Replies: 9
Views: 79

Re: VIN Plate and Rust Repair

I visited the car this weekend and upon closer inspection the number is indeed stamped directly into the sheet metal of the wheel housing. It is not a separate piece after all, it was just evidently painted an aluminum gray at some point and I was deceived. That does raise the possibility, as Mike W...
by 528i-1981
Fri May 03, 2019 1:31 pm
Forum: Tech Forum
Topic: VIN Plate and Rust Repair
Replies: 9
Views: 79

Re: VIN Plate and Rust Repair

Under the front right wing I found some rust that was on its way to ugly. We're all friends here, so I'll open the kimono. https://i.ibb.co/6y9zyQP/E12-wheelhouse.jpg My body man says he's seen much worse especially around the strut towers. It wasn't at all obvious while replacing the struts. PS. N...
by 528i-1981
Fri May 03, 2019 1:04 pm
Forum: Tech Forum
Topic: VIN Plate and Rust Repair
Replies: 9
Views: 79

Re: VIN Plate and Rust Repair

No rivets visible. Appears to be bonded. It’s 5 3/32 x 11/16 (hat tip JCat). JCat's is the same as mine (also 1981). It’s not like the squarish replacement ones that CoupeKing sells for E3s or E9s with printing on it, which are cooler. This is a screencap from a video, so forgive the quality: https:...
by 528i-1981
Fri May 03, 2019 4:30 am
Forum: Tech Forum
Topic: VIN Plate and Rust Repair
Replies: 9
Views: 79

Re: VIN Plate and Rust Repair

Thanks Mike - the tag is definitely separate from the sheet metal, although it's thin and the stamping may also show up on the sheet metal under the tag. I'm not sure this is true for earlier E12s. I will try to have it cut out as you suggest and see if it can be cleaned up and/or if the tag, which ...
by 528i-1981
Tue Apr 30, 2019 5:42 am
Forum: Tech Forum
Topic: VIN Plate and Rust Repair
Replies: 9
Views: 79

Re: VIN Plate and Rust Repair

Update for posterity - US front wheelhouse NLA but Walloth Nesch has early E12 wheel housing that is not a direct replacement due to the various mount points etc, but entirely serviceable for the shock tower and upper lip. For the VIN plate I had a seller on Etsy hand-stamp an aluminum blank. It’s n...
by 528i-1981
Wed Apr 24, 2019 6:16 pm
Forum: Tech Forum
Topic: VIN Plate and Rust Repair
Replies: 9
Views: 79

VIN Plate and Rust Repair

Under the front right wing I found some rust that was on its way to ugly. I ordered a new wheel house from ECS Tuning and will have that welded in. The VIN plate is located on that section. That sucks for preserving originality and identity of the chassis. Any suggestions other than a Brother label-...
by 528i-1981
Mon Apr 22, 2019 2:39 pm
Forum: Tech Forum
Topic: Heater fan inop
Replies: 6
Views: 93

Re: Heater fan inop

Hi Dave - maybe this will help, maybe not. Electrical gremlins have myriad causes. The center console plug (8 pins I think, it also connects to the rear defogger switch) has a green wire with a brown stripe that brings power to the blower motor (that's the way it is on the 81 528, and I assume the s...
by 528i-1981
Fri Mar 15, 2019 4:38 am
Forum: Tech Forum
Topic: Fuel/air mixture adjustments
Replies: 10
Views: 153

Re: Fuel/air mixture adjustments

What are the failure modes of an O2 sensor? Does it die and return 0mv or just sit still at 0.45 mV (or some other value) and not react? This article was really helpful to me, understanding of course that the E12 has only one unheated O2 sensor and no OBDII. So, junk from the exhaust contaminates t...
by 528i-1981
Thu Mar 14, 2019 3:41 pm
Forum: Tech Forum
Topic: Fuel/air mixture adjustments
Replies: 10
Views: 153

Re: Fuel/air mixture adjustments

So this is basically a calibrated voltmeter, correct? What are the failure modes of an O2 sensor? Does it die and return 0mv or just sit still at 0.45 mV (or some other value) and not react? You should be able to verify that the O2 sensor itself is working by inducing a lean and a rich condition. I ...
by 528i-1981
Mon Mar 11, 2019 8:36 am
Forum: Tech Forum
Topic: Fuel/air mixture adjustments
Replies: 10
Views: 153

Re: Fuel/air mixture adjustments

If I understand the lambda control accurately, the O2 sensor doesn't care about these things individually. The sensor is just measuring O2 content as a proxy for the completeness of the combustion. The intake flow, exhaust resistance and fuel quality all impact what happens inside the cylinder and t...
by 528i-1981
Tue Feb 26, 2019 7:15 am
Forum: Tech Forum
Topic: Electrical Problem
Replies: 7
Views: 110

Re: Electrical Problem

That sounds right. A failed resistor would mean an open circuit (infinite resistance), so that can’t be it. During start, isn’t the ballast resistor bypassed to get full battery voltage to the coil? This would explain why the car turned over when cranking then dies when the key goes to “on”. This wo...