Search found 1649 matches

by Mike W.
Mon Jun 17, 2019 10:26 am
Forum: Tech Forum
Topic: O2 sensor location
Replies: 5
Views: 261

Re: O2 sensor location

Very interesting info Mike, as always. I recently calculated my fuel economy and got about 15.5 L/ 100KM which I considered not too bad considering I just got my car running after 30 years. I drive with a fairly heavy foot in this car because its a lot of fun and I also do a fair bit of sitting in ...
by Mike W.
Sun Jun 16, 2019 12:10 pm
Forum: Tech Forum
Topic: O2 sensor location
Replies: 5
Views: 261

Re: O2 sensor location

My math says it's more like 14MPG, at least on US gallons. No, that's not the norm. Mostly highway should be more like 12l/100km or closer to 20MPG on US gallons. When my first E12 was our vacation car in the 90's I was getting 21-22 MPG, mostly highway, but some very slow in town traffic too. Assum...
by Mike W.
Sat Jun 15, 2019 11:40 am
Forum: Tech Forum
Topic: O2 sensor location
Replies: 5
Views: 261

Re: O2 sensor location

Your location suggests Belgium so no it would not have one, I'm fairly certain only US spec cars came with an O2 sensor. Even in E28s, only the "green" engine cars came with O2 sensors. On US spec cars they used a single downpipe from the manifolds to the cat and it was mounted in that downpipe, sev...
by Mike W.
Fri Jun 14, 2019 11:38 am
Forum: Tech Forum
Topic: Stall/cutout under load
Replies: 11
Views: 486

Re: Stall/cutout under load

I noticed when in the garage and foot flat on the gas and it drops down to 4000rpm, the fuel pressure gauge I have installed drops to near zero and then back up as the engine fires again. Our cars don't control the fuel pump though, just a simple relay with the AFM flap, Now I can't say why it's ha...
by Mike W.
Thu Jun 06, 2019 12:38 pm
Forum: Tech Forum
Topic: Stall/cutout under load
Replies: 11
Views: 486

Re: Stall/cutout under load

I actually had something very similar long ago on an 80 E24. Over half pedal and it would cut out. Turned out to be a broken wire going to the FI temp sensor up by the stat. Pull on the wires a bit to test. My break was hidden by the boot, but eventually I found it. It was the torquing action of the...
by Mike W.
Thu May 30, 2019 8:18 pm
Forum: Tech Forum
Topic: Idle Adjustments
Replies: 6
Views: 332

Re: Idle Adjustments

I'd set it at 2 or 3 turns open.
by Mike W.
Thu May 30, 2019 3:05 pm
Forum: Tech Forum
Topic: Idle Adjustments
Replies: 6
Views: 332

Re: Idle Adjustments

No, they're two different things. The mixture adjustment on the bottom is a AFM bypass, that air goes around the AFM flap, the volume adjustment on the side is metered air that does go thru the AFM and is measured. But the O2 sensor has a wide range of compensation and will correct what you do with ...
by Mike W.
Thu May 30, 2019 1:10 pm
Forum: Tech Forum
Topic: Idle Adjustments
Replies: 6
Views: 332

Re: Idle Adjustments

They were never known for a smooth idle, really they weren't even supposed to idle smooth. The O2 sensor always dithering, cycling up and down, up and down was a large part of it. It's best described as hunting. Not quite a miss, but hunting, never quite settling down. There were other cars that als...
by Mike W.
Mon May 06, 2019 11:18 am
Forum: Tech Forum
Topic: Crash/impact sensor location
Replies: 4
Views: 272

Re: Crash/impact sensor location

Try just above or to the left of the glove compartment, but accessible. But I believe it's a rollover sensor, not crash, and only operates in the event of it being on it's roof.
by Mike W.
Fri May 03, 2019 11:46 am
Forum: Tech Forum
Topic: VIN Plate and Rust Repair
Replies: 10
Views: 443

Re: VIN Plate and Rust Repair

Is it then the one that's about 2" X 3" and held on by what appear to be pop rivets? Kind of black and silver with the VIN stamped in? In that case I'd just drill out the pop rivets and rivet it on the new part.
by Mike W.
Thu May 02, 2019 10:51 pm
Forum: Tech Forum
Topic: VIN Plate and Rust Repair
Replies: 10
Views: 443

Re: VIN Plate and Rust Repair

The one that's stamped in the sheet metal? If you're in that far I'd cut it out and weld it into the new part. Easy compared to the rest of it. And it doesn't sound like there's any deception involved. I have heard of that being done to change VINs, which is not ok IMO, but you're keeping the same n...
by Mike W.
Mon Apr 29, 2019 1:00 pm
Forum: Tech Forum
Topic: Early e12 seat rails - similar chassis to..?
Replies: 10
Views: 458

Re: Early e12 seat rails - similar chassis to..?

Are sure both sides are the early style? My '79 had the later style on the drivers side and the early style on the passenger side. Regardless, and it's been a while, it seems like the seats were the same, mounting wise, just that the drivers side had the separate removable base allowing tilting of t...
by Mike W.
Thu Apr 25, 2019 10:35 pm
Forum: Tech Forum
Topic: Heater fan inop
Replies: 9
Views: 456

Re: Heater fan inop

It's a pain in the ass to take apart the console at all. So start by checking for voltage and ground, which should change, at the motor wires themselves. Usually they die by wear and rattle and squeal, but I've seen them die silent deaths too and just not work.
by Mike W.
Tue Mar 12, 2019 12:17 am
Forum: Tech Forum
Topic: Fuel/air mixture adjustments
Replies: 10
Views: 477

Re: Fuel/air mixture adjustments

Thanks Mike, I've looked at that and see it's exactly in the range when idling. But my understanding is the ECU only understands start up, idle, wide open throttle and adds fuel in relation to throttle opening. Isn't there a need to compensate for less potent fuel (compared to the late 70's) and fr...
by Mike W.
Fri Mar 08, 2019 10:16 pm
Forum: Tech Forum
Topic: Brakes and calipers
Replies: 2
Views: 231

Re: Brakes and calipers

You can't go to a significantly larger rotor with the stock calipers. Nothing else besides E12 (well, E3 also, but E12s have bigger brakes) fits E12s. Drill on down in Realoem to see what came on what. Likely your best and easiest upgrade will be to find brakes off a later E12 that are 280X22 front ...