Today I got the GS-911. This is a USB to BMW computer adapter and the associated software.
I ordered it last week for a few reasons:
- Double-check my diagnosis about the fuel pump
- Reset the “service engine soon” light after I replace the oil
- General maintenance
So, here’s what this has to say:
Yep. I guess I was right.
All the rest of the data is wicked cool too!
Of course I can’t really play a whole lot since the bike isn’t running… but I’m looking forward to using this in the future!
Every once in a great while the bike stalls on downshift. It happens once every 200-300 miles… I’m wondering what the fault code is for that? I wonder if it was the fuel pump starting the fail?
You know I’ve been trying to repair my motorcycle over the past couple of weeks. I’ve narrowed the problem down to what I’m pretty sure is the fuel pump being shorted out.
The problem arrises when I look at the parts fiche:
I went ahead and ordered part #1 — the entire fuel pump assembly. I didn’t want to dick around with fitting a new pump to the thing since that involved hoses and clamps that require more tools to buy. It winds up being maybe $40 more than the pump plus extra parts but it eliminates a lof of the uncertainly.
That’s not the problem.
Part #10 is the the part that worried me. It’s the fuel level sensor. It’s somehow attached to the pump.
Looking at this I was wondering how this all fits together with the pump and how it comes out, and more importantly, how it goes back together.
I was all ready to just go in blind and worried when I found the shop manual for my bike. (I had one for my earlier iteration of the bike — that one had a float instead of a new-fangled, and as it turns out fault-prone, electric sensor)
It seems that the business end of the sensor (#1 below) attaches to the fuel filler (#2) and the only interaction with the pump is the plug you see on the upper-right of the picture up there.
The only thing I have to do since I’m not screwing with the sensor strip is unplug #3 from the fuel pump assembly, swap in a new one, then plug the existing fuel sensor back in.
All I have to do is wait for the wrench (#1 above) to come in from the US warehouse. Booo… I ordered it on Thursday night and it’ll take 2-7 days (business days I’m presuming) to come in and then get shipped to me.
C’est la vie.
But knowing what I’m up against — or as the case me be not up against — is a nice thing. Now I’m just hoping my diagnosis is correct!
The Audi was almost 12 and a half years old. It lived a tough life in the Cleveland winters. The outer body doesn’t show it as much, but 12 years of salt has taken a toll. The rear shocks were pretty much shot as was bits of the electrical.
Today she was traded in for the Subaru Outback that you see up there.
We needed a car that was more reliable and could do a better job of hauling stuff around. The Subaru fit the bill while simultaneously being a car and a hauler. It’s not an SUV; it’s a wagon.
We considered something from BMW or Audi to be the replacement of the A6, but with our present situation of not really driving around that much neither of us thought that dumping extra cash into a car like that would be worth it for real.
We still have the leather seats and all the fun stuff… but we left the badge behind. Seeing that we might tow something in the future (something like a SylvanSport Go for instance) we got the bigger 3.6l engine.
So far, so good… I’m sure I’ll have more to say in the future.
A year ago we were mid-move. All of our stuff — well, most of it for the most part — was on a truck en route to a warehouse.
When the furniture, among other things, was finally delivered it came with mostly covered with scratches. We got the estimate for repair. The mover’s insurance paid it.
A few months ago we enlisted Gabel’s to fix it.
Today the result arrived back at the house.
Working with wood is an art form, more so when it comes to finishing it. These guys have it down. The furniture that came today was as good or better than when we got it the first time around.
From working a bit with wood I realize how hard it can be. It’s hard to get a smooth finish. An even finish. A finish that matches the rest of the wood. Knowing how to work with the specific species of wood (mostly cherry in our case). All sorts of questions, techniques, and experience.
I’m just happy we have our storage space back!
A year ago we were getting settled in the small apartment overlooking the Sound and the train. A year ago I just came home from my third day at Amazon.
It’s amazing how time flies.
We had two new people we were adding to the team — one intern and one full time — and we were doing introductions. It was a weekly team meeting and it was my turn. I realized then that I was at Amazon for one year and one day. (Right after another co-worker Andrei walked on his hands…)
It’s been a fun year.
It’s been a big year.
It’s been a stressful year.
It’s been a good year.
Tonight I tore into the bike again trying to root out the cause of the bike woes.
Online I heard a suggestion that the throttle position sensor might be screwed up. That was an easy check. I pulled the connector and threw the multimeter on it. It’s a simple potentiometer and simple to check with the ohmmeter. 4.3k rail to rail with the center tap going from 1.2k to 4.1k. Right around in spec.
Next up was the fuel pump again. Further tearing it up I got to the fuel pump.
1.1 ohm across the leads seems low, but the final test is current draw. I rigged up a janky setup and tested it.
For a brief instant I saw 15A on the Fluke. Thankfully it is specced to handle 20A for 30s so this wasn’t a problem. The 7.5A fuse inline fuse blew on cue.
The pump is, essentially, a dead short.
That would explain no gas getting pumped.
I guess I’m in the market for a new one now…
While I was down in California the fuel pump controller bypass cable arrived in the mail.
To recap, what this does is hook the fuel pump directly into power — more or less as direct as you can make things.
To verify that power is in fact there I double checked with the power on and the cable plugged into the aux power jack on the bike:
Sure enough, power is flowing. Looking on the bike seat you can see the controller I pulled off the bike. This one is a new-style one that’s fully potted.
It hooked up no problem…
The plug closest is the fuel level sensor plug. Hidden behind the bodywork is the fuel line itself.
Even with the fuel pump connected directly I didn’t get anything. I got brave and pulled the fuel line. If things were working I would get a fountain of raw gas shooting out the now vacant hole.
This pretty much rules out everything except the pump itself.
At this point I have to decide if I want to replace the pump myself. It’s a $150 part along with $100 of specialized tools. It’s still cheaper than the BMW-branded pump plus all the dealer markup.
Oh… and if I got a tow to get to the dealer…
Grrr… this is just my experience in the past two hours driving to the airport and getting to the gate. This is a rant. You may as well skip it.
So, driving from Newport Beach to John Wayne Airport in my rental I needed to get gas for my rental car. The first station I pulled up to didn’t have card readers on the pumps. Strange. Even in the boonies I found card readers. I go in to the office. Either cash — up front — or a credit card with a $2.50 up-charge (which I think it’s against the rules anyway)
Ok, next station.
Card declined at the reader… huh? Ok some fraud detect or something. Into the office.
“How much do you want to put in?”
“A full tank.”
“So how much? $50? $60?”
“It’s a rental I don’t know. A full tank.”
“I don’t care. $60.”
Like I said… just a rant.
I know I’m an odd bird.
I found out more about my oddness over the weekend. If someone gives me a good problem, there’s little I can do to not try to solve it. En’s uncle is the founder and CEO of Bambeck Systems, Inc. They make combustion control systems for industrial applications — they include things like refineries, paper mills and beer brewers in their portfolio.
He’s facing a couple of engineering challenges that I won’t go into great detail over. Most of these are things that I’ve never really pursued in any great depth before. But they are problems. I solve problems.
Thousands of hours of reading random crap, looking at designs and teardowns, reading wikipedia… they all come together to almost make it seem like I know what I’m talking about.
I have to say that I’ve never really thought I’d use anything read about materials science and manufacturing in real life. But I guess somehow it works.
Driving from John Wayne airport up to my brother’s place I noticed something on beside the highway.
On the way back down I took a picture of it.
I was of the understanding that crossfit is supposed to be anything but lax.